Download

PDF Abstract Text:

+5 V Powered CMOS RS-232 Drivers / Receivers ADM223 / ADM230L­ADM241L

ADM232L TYPICAL OPERATING CIRCUIT

+5 V Powered CMOS RS-232 Drivers / Receivers ADM223 / ADM230L-ADM241L
ADM232L TYPICAL OPERATING CIRCUIT
+5V INPUT 1 C1+ 3 C1- +5V TO +10V VOLTAGE DOUBLER VCC 16 V+ 2 V- 6 1µF 6.3V 1µF 16V 1µF 6.3V 1µF 6.3V
4 C2+ +10V TO -10V VOLTAGE INVERTER 5 C2- 11 10 12 9 GND 15 T1 T2 R1 R2
1µF 16V T1OUT T2OUT R1IN R2IN
TTL / CMOS INPUTS
T1IN T2IN
RS-232 OUTPUTS
TTL / CMOS OUTPUTS
R1OUT R2OUT
RS-232 INPUTS
ADM232L
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Table I. Selection Table
Part Number ADM223 ADM230L ADM231L ADM232L ADM233L ADM234L ADM235L ADM236L ADM237L ADM238L ADM239L ADM241L REV. 0
Power Supply Voltage +5 V +5 V +5 V & +7.5 V to +13.2 V +5 V +5 V +5 V +5 V +5 V +5 V +5 V +5 V & +7.5 V to +13.2 V +5 V
External Capacitors 4 4 2 4 None 4 None 4 4 4 2 4
Low Power Shutdown (SD) Yes (SD) Yes No No No No Yes Yes No No No Yes
TTL Three-State EN Yes (EN) No No No No No Yes Yes No No Yes Yes
No. of Pins 28 20 14 16 20 16 24 24 24 24 24 28
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617 / 329-4700 Fax: 617 / 326-8703
ADM223 / ADM230L-ADM241L-SPECIFICATIONS
Parameter Output Voltage Swing VCC Power Supply Current V+ Power Supply Current Shutdown Supply Current Input Logic Threshold Low, VINL Input Logic Threshold High, VINH Logic Pull-Up Current RS-232 Input Voltage Range RS-232 Input Threshold Low RS-232 Input Threshold High RS-232 Input Hysteresis RS-232 Input Resistance TTL / CMOS Output Voltage Low, VOL TTL / CMOS Output Voltage High, VOH TTL / CMOS Output Leakage Current Output Enable Time (TEN) Output Disable Time (TDIS) Propagation Delay Instantaneous Slew Rate1 Transition Region Slew Rate Output Resistance RS-232 Output Short Circuit Current
NOTE 1 Sample tested to ensure compliance. Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS
This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operaion sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
REV. 0
ADM223 / ADM230L-ADM241L
ORDERING GUIDE
Model ADM223 ADM223AR ADM223ARS Temperature Range -40°C to +85°C -40°C to +85°C Package Option R-28 RS-28 Model ADM230L ADM230LJN ADM230LJR ADM230LAN ADM230LAR ADM230LAQ ADM233L ADM233LJN ADM233LAN Temperature Range 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 0°C to +70°C -40°C to +85°C Package Option N-20 R-20 N-20 R-20 Q-20 N-20 N-20 Model ADM231L ADM231LJN ADM231LJR ADM231LAN ADM231LAR ADM231LAQ ADM234L ADM234LJN ADM234LJR ADM234LAN ADM234LAR ADM234LAQ ADM237L ADM237LJN ADM237LJR ADM237LAN ADM237LAR ADM237LAQ ADM241L ADM241LJR ADM241LAR ADM241LJRS ADM241LARS Temperature Range 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C Package Option N-14 R-16 N-14 R-16 Q-14 N-16 R-16 N-16 R-16 Q-16 N-24 R-24 N-24 R-24 Q-24 R-28 R-28 RS-28 RS-28
ADM232L ADM232LJN ADM232LJR ADM232LAN ADM232LAR ADM232LAQ
0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C
N-16 R-16 N-16 R-16 Q-16 N-24A N-24A D-24
ADM235L ADM235LJN 0°C to +70°C ADM235LAN -40°C to +85°C ADM235LAQ -40°C to +85°C
ADM236L ADM236LJN ADM236LJR ADM236LAN ADM236LAR ADM236LAQ ADM239L ADM239LJN ADM239LJR ADM239LAN ADM239LAR ADM239LAQ
0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -40°C to +85°C
N-24 R-24 N-24 R-24 Q-24 N-24 R-24 N-24 R-24 Q-24
ADM238L ADM238LJN ADM238LJR ADM238LAN ADM238LAR ADM238LAQ
0°C to +70°C 0°C to +70°C 40°C to +85°C -40°C to +85°C -40°C to +85°C
N-24 R-24 N-24 R-24 Q-24
CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADM223 / ADM230L-ADM241L features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
ESD SENSITIVE DEVICE
REV. 0
ADM223 / ADM230L-ADM241L
+5V INPUT
T3OUT T1OUT T2OUT T2IN T1IN GND VCC C1+ V+ C1-
20 T4OUT 19 T5IN
1µF 6.3V 8 C1+ +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER VCC 7 V+ 9 1µF 6.3V 1µF
10 C1- 11 C2+ 12 C2- 5
ADM230L
TOP VIEW (Not to Scale)
T5OUT T4IN T3IN V- C2- C2+
TTL / CMOS INPUTS
1µF 16V
T1IN T2IN
T1OUT T2OUT T3OUT T4OUT RS-232 OUTPUTS
T3IN T4IN
Figure 1. ADM230L DIP / SOIC Pin Configuration
T5IN NC
T5OUT SD
ADM230L
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT
Figure 2. ADM230L Typical Operating Circuit
C1+ C1- V- T2OUT R2IN R2OUT T2IN 1 2 3 14 V+ 13 VCC
ADM231L
4 5 6 7 TOP VIEW (Not to Scale)
12 GND 11 10 9 8 T1OUT R1IN R1OUT T1IN
1µF 16V 2 C- 1 C+ 13 VCC +12V TO -12V VOLTAGE CONVERTER V+ 14 V- 3 +7.5V TO 13.2V 1µF 16V +5V INPUT 1µF
T1IN 8 T1 11
C1+ C1- V- T2OUT R2IN R2OUT T2IN NC
V+ VCC GND T1OUT
TTL / CMOS INPUTS T2IN 7 T2 4
T1OUT T2OUT R1IN
RS-232 OUTPUTS
R1OUT TTL / CMOS OUTPUTS R2OUT
ADM231L
TOP VIEW (Not to Scale)
RS-232 INPUTS 6 GND 12 R2 5 R2IN
12 R1IN 11 10 9 R1OUT T1IN NC
ADM231L
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 4. ADM231L Typical Operating Circuit (DIP Pinout) Figure 3. ADM231L DIP & SOIC Pin Configurations
REV. 0
ADM223 / ADM230L-ADM241L
+5V INPUT
C1+ V+ C1- C2+ C2- V- T2OUT R2IN
16 VCC 15 14 GND T1OUT R1IN R1OUT T1IN T2IN R2OUT
1µF 6.3V
+5V TO +10V VOLTAGE DOUBLER
1µF 6.3V
1µF 16V
+10V TO -10V VOLTAGE INVERTER
1µF 16V
ADM232L
TOP VIEW (Not to Scale)
T1IN TTL / CMOS INPUTS T2IN
T1OUT T2OUT R1IN
RS-232 OUTPUTS
R1OUT TTL / CMOS OUTPUTS R2OUT
RS-232 INPUTS R2 8 R2IN
ADM232L
Figure 5. ADM232L DIP / SOIC Pin Configuration
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 6. ADM232L Typical Operating Circuit
+5V INPUT
T2IN T1IN R1OUT R1IN T1OUT GND VCC C1+ GND C2-
R2OUT R2IN T2OUT V- C2- C2+ V+ C1- V- C2+
T1IN TTL / CMOS INPUTS T2IN
T1OUT T2OUT R1IN
RS-232 OUTPUTS
R1OUT TTL / CMOS OUTPUTS R2OUT DO NOT MAKE CONNECTIONS TO THESE PINS INTERNAL -10V POWER SUPPLY INTERNAL +10V POWER SUPPLY
ADM233L
TOP VIEW (Not to Scale)
RS-232 INPUTS R2 19 R2IN
C2+ 11 C2+ 15 C2- 10 C2- 16 GND 6 GND 9
ADM233L
Figure 7. ADM233L DIP Pin Configuration
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 8. ADM233L Typical Operating Circuit
REV. 0
ADM223 / ADM230L-ADM241L
+5V INPUT 1µF 6.3V 7 C1+ 9 C1- 10 C2+ 11 C2- 4 3 +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER VCC V+ 6 8 1µF 6.3V 1µF
T1OUT T2OUT T2IN T1IN GND VCC C1+ V+
T3OUT T4OUT T4IN T3IN V- C2- C2+ C1-
T4IN TTL / CMOS INPUTS T2IN 1µF 16V
1µF 16V
ADM234L
TOP VIEW (Not to Scale)
T1OUT T2OUT RS-232 OUTPUTS T3OUT T4OUT
ADM234L
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT
Figure 9. ADM234L DIP / SOIC Pin Configuration
Figure 10. ADM234L Typical Operating Circuit
+5V INPUT 1µF 12 VCC T1IN 8 T1 T2 3 T1OUT T2OUT T3OUT T4OUT RS-232 OUTPUTS
T4OUT T3OUT T1OUT T2OUT R2IN R2OUT T2IN T1IN R1OUT
R3IN R3OUT T5IN
TTL / CMOS INPUTS
T2IN T3IN T4IN
ADM235L
TOP VIEW (Not to Scale)
T5OUT R1IN R2IN R3IN R4IN RS-232 INPUTS
T5OUT R4IN R4OUT T4IN T3IN R5OUT R5IN
TTL / CMOS OUTPUTS R1OUT R2OUT R3OUT R4OUT
R1IN 10 GND 11 VCC 12
R5OUT
GND 11
ADM235L
Figure 11. ADM235L DIP Pin Configuration
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 12. ADM235L Typical Operating Circuit
REV. 0
ADM223 / ADM230L-ADM241L
+5V INPUT 10 C1+ 12 C1- 13 C2+ 14 C2- 7 VCC 9 V+ 11 1µF 6.3V +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER 1µF 6.3V
T3OUT T1OUT T2OUT R1IN R1OUT T2IN T1IN GND VCC C1+
T4OUT
23 R2IN 22 R2OUT
1µF 16V
1µF 16V T1OUT T2OUT RS-232 OUTPUTS
21 SD 20 EN T4IN
TTL / CMOS INPUTS
T1IN T2IN T3IN T4IN R1OUT TTL / CMOS OUTPUTS R2OUT
ADM236L
TOP VIEW (Not to Scale)
T3OUT T4OUT R1IN R2IN RS-232 INPUTS
18 T3IN 17 R3OUT
16 R3IN 15 14 13 V- C2- C2+
V+ 11 C1- 12
R3OUT EN
R3IN SD
ADM236L
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 13. ADM236L DIP / SOIC Pin Configuration Figure 14. ADM236L Typical Operating Circuit
+5V INPUT 10 C1+ 12 C1- 13 C2+ 14 C2-
1µF 6.3V
+5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER
1µF 6.3V
T3OUT T1OUT T2OUT R1IN R1OUT T2IN T1IN GND VCC C1+
T4OUT
1µF 16V
23 R2IN 22 21 20 R2OUT T5IN T5OUT T4IN
TTL / CMOS INPUTS T2IN T3IN T4IN T1IN
1µF 16V T1OUT T2OUT RS-232 OUTPUTS
ADM237L
TOP VIEW (Not to Scale)
T3OUT T4OUT T5OUT R1IN R2IN
18 T3IN 17 R3OUT
T5IN R1OUT TTL / CMOS OUTPUTS R2OUT
16 R3IN 15 14 13 V- C2- C2+
V+ 11 C1- 12
RS-232 INPUTS
R3OUT
ADM237L
Figure 15. ADM237L DIP / SOIC Pin Configuration
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 16. ADM237L Typical Operating Circuit
REV. 0
ADM223 / ADM230L-ADM241L
+5V INPUT 1µF 6.3V 10 C1+ 12 C1- 13 C2+ 14 C2- 5 +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER VCC 9 V+ 11 1µF 6.3V 1µF
T2OUT T1OUT R2IN R2OUT T1IN R1OUT R1IN GND VCC C1+
T3OUT
23 R3IN 22 21 20 R3OUT
1µF 16V
1µF 16V T1OUT T2OUT RS-232 OUTPUTS
T4IN T4OUT T3IN
TTL / CMOS INPUTS T2IN T3IN T4IN R1OUT R2OUT 18 T2 1 24
ADM238L
TOP VIEW (Not to Scale)
T3OUT T4OUT R1IN R2IN RS-232 INPUTS
18 T2IN 17 R4OUT
16 R4IN 15 14 13 V- C2- C2+
TTL / CMOS OUTPUTS
V+ 11 C1- 12
R3OUT R4OUT
R3IN R4IN
ADM238L
Figure 17. ADM238L DIP / SOIC Pin Configuration
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 18. ADM238L Typical Operating Circuit
+5V INPUT 1µF VCC 4 V+ 5 V- 8 1µF 16V T1IN TTL / CMOS INPUTS T2IN T3IN R1OUT R2OUT TTL / CMOS OUTPUTS 24 23 T1 19 20 13 T1OUT T2OUT RS-232 OUTPUTS +7.5V TO +13.2V INPUT
R1OUT R1IN GND VCC V+ C+ C- V- R5IN R5OUT R4OUT
1µF 16V
C1+ C1-
+12V TO -12V VOLTAGE INVERTER
23 T2IN 22 21 20 R2OUT R2IN T2OUT T1OUT R3IN R3OUT T3IN
ADM239L
TOP VIEW (Not to Scale)
T3OUT R1IN R2IN RS-232 INPUTS
15 NC 14 13 EN T3OUT
R3OUT R4OUT
R3IN R4IN
R5OUT EN
R5IN NC
ADM239L
Figure 19. ADM239L DIP / SOIC Pin Configuration
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 20. ADM239L Typical Operating Circuit
REV. 0
ADM223 / ADM230L-ADM241L
+5V INPUT 1µF 16V 12 C1 + 14 C1 - 15 C2 + 16 C2 - 7 6 +5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER VCC 11 V+ 13 V- 17 1µF 6.3V 1µF
T3OUT T1OUT T2OUT R2IN R2OUT T2IN T1IN R1OUT R1IN
28 T4OUT 27 R3IN 26 R3OUT
T1IN T2IN T3IN 1µF 16V
1µF 16V
25 SD 24 EN 23 R4IN
TTL / CMOS INPUTS
T1OUT T2OUT RS-232 OUTPUTS
ADM241L
TOP VIEW (Not to Scale)
R4OUT T4IN T3IN R5OUT
T4IN R1OUT R2OUT TTL / CMOS OUTPUTS 28 9
T3OUT T4OUT R1IN R2IN RS-232 INPUTS
GND 10 VCC 11 C1+ 12 V+ 13 C1- 14
18 R5IN 17 V-
R3OUT R4OUT 26 22 R3 R4 27 23 18 25 R3IN R4IN
16 C2- 15 C2+
R5OUT EN
R5IN SD
GND 10
ADM241L
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 21. ADM241L SOIC / SSOP Pin Configuration Figure 22. ADM241L Typical Operating Circuit
T3OUT T1OUT T2OUT R2IN R2OUT T2IN T1IN R1OUT R1IN
28 T4OUT 27 R3IN 26 R3OUT
1µF 16V
+5V TO +10V VOLTAGE DOUBLER +10V TO -10V VOLTAGE INVERTER
VCC 11 V+ 13 V- 17
1µF 6.3V
1µF 16V
25 SD 24 EN 23 R4IN
TTL / CMOS INPUTS
T1IN T2IN T3IN T4IN R1OUT R2OUT TTL / CMOS OUTPUTS
T1OUT T2OUT RS-232 OUTPUTS
ADM223
TOP VIEW (Not to Scale)
R4OUT T4IN T3IN R5OUT
T3OUT T4OUT R1IN R2IN RS-232 INPUTS
GND 10 VCC 11 C1+ 12 V+ 13 C1- 14
18 R5IN 17 V-
R3OUT R4OUT 27 23 R3IN R4IN
16 C2- 15 C2+
R5OUT EN
R5IN SD
GND 10
ADM223
INTERNAL 400k PULL-UP RESISTOR ON EACH TTL / CMOS INPUT INTERNAL 5k PULL-DOWN RESISTOR ON EACH RS-232 INPUT NOTE: RECEIVERS R4 AND R5 REMAIN ACTIVE IN SHUTDOWN.
Figure 23. ADM223 SOIC / SSOP Pin Configuration Figure 24. ADM223 Typical Operating Circuit
REV. 0
ADM223 / ADM230L-ADM241L
PIN FUNCTION DESCRIPTION
Mnemonic VCC V+ V- GND C+ C- C1+
TIN TOUT RIN ROUT EN / EN
Table I. ADM235L, ADM236L, ADM241L Truth Table
Table II. ADM223 Truth Table
Status Normal Operation Normal Operation Shutdown
Transmitters T1-T5 Enabled Enabled Disabled
Receivers R1-R5 Enabled Disabled Disabled
SD EN Status 0 0 1 1 0 1 0 1 Shutdown Shutdown Normal Operation Normal Operation
Transmitters Receivers T1-T4 R1-R3 R4, R5 Disabled Disabled Enabled Enabled Disabled Disabled Disabled Enabled Disabled Enabled Disabled Enabled
REV. 0
ADM223 / ADM230L-ADM241L
VOUT (1 O / P LOADED)
VOUT (ALL O / Ps LOADED) 6
4 3.0 4.0 VCC - V 5.0
Figure 25. Charge Pump V+, V- vs. Current
Figure 27. Transmitter Output Voltage vs. VCC
10 TOUT HIGH
SLEW RATE - V / µs
6 TOUT LOW 4
CAPACITIVE LOAD - pF
Figure 26. Transmitter Slew Rate vs. Load Capacitance
Figure 28. Transmitter Output Voltage vs. Current
300 V- (UNLOADED)
V+, V- IMPEDANCE -
V- (LOADED)
V+ (UNLOADED) 100 V+ (LOADED)
Figure 29. Charge Pump Impedance vs. VCC
REV. 0
ADM223 / ADM230L-ADM241L
Figure 30. Charge Pump, V+, V- Exiting Shutdown
Figure 31. Transmitter Output Loaded Slew Rate
Figure 32. Transmitter Output Unloaded Slew Rate
GENERAL INFORMATION
CIRCUIT DESCRIPTION
The internal circuitry in the ADM230L-ADM241L consists of three main sections. These are: (a) A charge pump voltage converter (b) RS-232 to TTL / CMOS receivers (c) TTL / CMOS to RS-232 transmitters
Charge Pump DC-DC Voltage Converter
INTERNAL OSCILLATOR
Figure 33. Charge-Pump Voltage Doubler
REV. 0
ADM223 / ADM230L-ADM241L
INTERNAL OSCILLATOR
Figure 34. Charge-Pump Voltage Inverter
Capacitors C3 and C4 are used to reduce the output ripple. Their values are not critical and can be reduced if higher levels of ripple are acceptable. The charge pump capacitors C1 and C2 may also be reduced at the expense of higher output impedance on the V+ and V- supplies. The V+ and V- supplies may also be used to power external circuitry if the current requirements are small.
Transmitter (Driver) Section
Enable Input The ADM235, ADM239, ADM241L and ADM223 feature an enable input used to enable or disable the receiver outputs. The enable input is active low on the ADM235L, ADM239L, ADM241L and active high on the ADM223. Refer to Tables I and II. When disabled, all receiver outputs are placed in a high impedance state. This function allows the outputs to be connected directly to a microprocessor data bus. It can also be used to allow receivers from different devices to share a common data line. The timing diagram for the enable function is shown in Figure 35.
3V EN 0V TEN 3.5V ROUT 0.8V TDIS VOH - 0.1V VVOL + 0.1V
Receiver Section
POLARITY OF EN IS REVERSED FOR ADM223.
Figure 35. Enable Timing
APPLICATION HINTS Driving Long Cables
In accordance with the EIA-232-E standard, long cables are permissible provided that the total load capacitance does not exceed 2500 pF. For longer cables which do exceed this, then it is possible to trade off baud rate vs. cable length. Large load capacitances cause a reduction in slew rate, and hence the maximum transmission baud rate is decreased. The ADM230L-ADM241L are designed so that the slew rate reduction with increasing load capacitance is minimized. For the receivers, it is important that a high level of noise immunity be inbuilt so that slow rise and fall times do not cause multiple output transitions as the signal passes slowly through the transition region. The ADM230L-ADM241L have 0.5 V of hysteresis to guard against this. This ensures that, even in noisy environments, error-free reception can be achieved.
High Baud Rate Operation
Shutdown (SD)
The ADM223, ADM230L, ADM235L, ADM236L and ADM241L feature a control input that may be used to disable the part and reduce the power consumption to less than 5 µW. This is very useful in battery operated systems. During shutdown the charge pump is turned off, the transmitters are disabled and all receivers except R4 and R5 on the ADM223 are put into a high-impedance disabled state. Receivers R4 and R5 on the ADM223 remain enabled during shutdown. This feature allows monitoring external activity such as ring indicator monitoring while the device is in a low power shutdown mode. The shutdown control input is active high on all parts except the ADM223 where it is active low. Refer to Tables I and II.
REV. 0
ADM223 / ADM230L-ADM241L
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
14-Lead Plastic DIP (N-14)
14 PIN 1 1 0.795 (20.19) 0.725 (18.42) 0.210 (5.33) 0.200 (5.05) 0.125 (3.18) 0.022 (0.558) 0.014 (0.356) 0.100 (2.54) BSC 0.070 (1.77) 0.045 (1.15) 0.060 (1.52) 0.015 (0.38) 7
14-Lead Cerdip (Q-14)
14 PIN 1 7 0.780 (19.81) 0.300 (7.62) REF 0.163 (4.14) 0.133 (3.378) 8 0.271 (6.89) 0.240 (6.09)
0.125 (3.17) MIN 0.02 (0.5) 0.016 (0.406) 0.11 (2.79) 0.099 (2.28) 0.06 (1.52) 0.05 (1.27)
SEATING PLANE
16-Lead Plastic DIP (N-16) 16-Lead Cerdip (Q-16)
16 PIN 1 1 0.840 (21.33) 0.745 (18.93) 0.210 (5.33) 0.200 (5.05) 0.125 (3.18) 0.060 (1.52) 0.015 (0.38) 8 0.325 (8.25) 0.300 (7.62) 0.195 (4.95) 0.115 (2.93) 9 0.280 (7.11) 0.240 (6.10)
PIN 1 1 0.780 (19.81) 0.163 (4.14) 0.133 (3.378) 8 0.300 (7.62) REF 16 9 0.271 (6.89) 0.240 (6.09)
0.125 (3.17) MIN 0.02 (0.5) 0.016 (0.406) 0.11 (2.79) 0.099 (2.28) 0.06 (1.52) 0.05 (1.27)
0.100 (2.54) BSC
SEATING PLANE
16-Lead SOIC (R-16)
0.050 (1.27) BSC
REV. 0
ADM223 / ADM230L-ADM241L
20-Lead Plastic DIP (N-20)
20 PIN 1 1 10 11 0.280 (7.11) 0.240 (6.10)
PIN 1 1 10 0.97 (24.64) 0.935 (23.75) 0.32 (8.128) 0.29 (7.366) 0.18 (4.57) 0.125 (3.18) 0.011 (0.28) 0.009 (0.23) SEATING PLANE 15 ° 0° 20
20-Lead Cerdip (Q-20)
1.060 (26.90) 0.925 (23.50) 0.210 (5.33) 0.200 (5.05) 0.125 (3.18) 0.022 (0.558) 0.014 (0.356) 0.100 (2.54) BSC 0.070 (1.78) 0.045 (1.15) 0.060 (1.52) 0.015 (0.38) 0.150 (3.81)
SEATING PLANE
LEAD NO. 1 IDENTIFIED BY DOT OR NOTCH
20-Lead SOIC (R-20)
24-Lead Ceramic DIP (D-24)
0.4193 (10.65) 0.3937 (10.00) PIN 1 1 10
0.0291 (0.74) x 45 ° 0.0098 (0.25)
0.0500 (1.27) BSC
SEATING PLANE
24-Lead Plastic DIP (N-24)
24-Lead Plastic DIP (N-24A)
24 13 0.55 (13.97) 0.53 (13.47) 1 1.25 (31.75) 1.24 (31.5) 0.2 (5.08) MAX 0.175 (4.45) 0.12 (3.05) 0.02 (0.508) 0.015 (0.381) 0.16 (4.07) 0.14 (3.56) 12 0.606 (15.4) 0.594 (15.09)
SEATING PLANE 0.02 (0.5) 0.016 (0.41) 0.11 (2.79) 0.09 (2.28) 0.07 (1.78) 0.05 (1.27)
SEATING PLANE
NOTES 1. LEAD NO. 1 IDENTIFIED BY DOT OR NOTCH 2. PLASTIC LEADS WILL BE EITHER SOLDER DIPPED OR TIN PLATED IN ACCORDANCE WITH MIL-M-38510 REQUIREMENTS.
REV. 0
24-Lead Cerdip (Q-24)
24 PIN 1 1 1.290 (32.77) MAX 0.225 (5.715) MAX 0.125 (3.175) MIN 0.180 (4.572) MAX SEATING PLANE 0.070 (1.778) 15° 0.021 (0.533) 0.110 (2.794) 0.065 (1.651) 0.020 (0.508) 0.015 (0.381) 0.090 (2.286) 0.055 (1.397) 0° TYP TYP TYP 1. LEAD NO. 1 IDENTIFIED BY DOT OR NOTCH. 2. CERDIP LEADS WILL BE EITHER TIN PLATED OR SOLDER DIPPED IN ACCORDANCE WITH MIL-M-38510 REQUIREMENTS. 0.012 (0.305) 0.008 (0.203) TYP 12 0.320 (8.128) 0.290 (7.366) 13 0.295 (7.493) MAX
28-Lead SOIC (R-28)
0.05 (1.27) BSC
1. LEAD NO. IDENTIFIED BY A DOT. 2. SOICLEADS WILL BE EITHER TIN PLATED OR SOLDER DIPPED IN ACCORDANCE WITH MIL-M-38510 REQUIREMENTS.
24-Lead SOIC (R-24)
28-Lead SSOP (RS-28)
0.05 (1.27) BSC
0.0256 (0.65) BSC
1. LEAD NO. 1 IDENTIFIED BY A DOT. 2. SOIC LEADS WILL BE EITHER TIN PLATED OR SOLDER DIPPED IN ACCORDANCE WITH MIL-M-38510 REQUIREMENTS
1. LEAD NO. 1 IDENTIFIED BY A DOT. 2. LEADS WILL BE EITHER TIN PLATED OR SOLDER DIPPED IN ACCORDANCE WITH MIL-M-38510 REQUIREMENTS
PRINTED IN U.S.A.
C1900-18-4 / 94