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MC145406 Driver/Receiver
232-E CCITT V.28 (Formerly RS-232-D)
MC145406 silicon-gate CMOS that combines three drivers three receivers fulfill electrical specifications standards compatibility, slew-rate-limited output, 300- power-off source impedance, output typically switching within supply rails. receivers handle while presenting impedance. Hysteresis receivers aids reception noisy signals. combining both drivers receivers single CMOS chip, MC145406 provides efficient, low-power solutions 232-E V.28 applications. Drivers Supply Range 300- Power-Off Source Impedance Output Current Limiting Compatible Maximum Slew Rate V/µs Receivers Input Voltage Range When Input Impedance Hysteresis Input Switchpoint
SUFFIX PLASTIC CASE
SUFFIX CASE 751G
SUFFIX SSOP CASE 940B
BLOCK DIAGRAM
RECEIVER HYSTERESIS DRIVER LEVEL SHIFT
ASSIGNMENT
DRIVER RECEIVER
*Protection circuit
Motorola, Inc. 1995
1/95
MC145406
MAXIMUM RATINGS (Voltage polarities referenced GND)
Rating Supply Voltages (VDD VCC) Symbol (VSS (VDD (VCC 0.5) Tstg Value 13.5 13.5 Unit This device contains protection circuitry protect inputs against damage high static voltages electric fields; however, advised that normal precautions taken avoid application voltage higher than maximum rated voltages this high impedance circuit. proper operation, recommended that voltages pins constrained range VCC. Also, voltage should constrained (VSS VRx1-3 (VDD should constrained VTx1-3 VDD. Unused inputs must always tied appropriate logic voltage level (e.g., Ground Rx.)
Input Voltage Range Rx1-3 Inputs DI1-3 Inputs Current Power Dissipation Operating Temperature Range Storage Temperature Rate
ELECTRICAL CHARACTERISTICS (All polarities referenced 85°C)
Parameter Supply Voltage (VDD VCC) Quiescent Supply Current (Outputs unloaded, inputs low) Symbol 13.2 13.2 Unit
RECEIVER ELECTRICAL SPECIFICATIONS
(Voltage polarities referenced VCC, 85°C) Characteristic Input Turn-on Threshold VDO1-DO3 VOL, Input Turn-off Threshold VDO1-DO3 VOH, Input Threshold Hysteresis Input Resistance (VSS VRx1-Rx3 (VDD High-Level Output Voltage (VRx1-Rx3 (VSS V))* DO1-DO3 Low-Level Output Voltage (VRx1-Rx3 (VDD V))* DO1-DO3 0.01 0.02 Rx1-Rx3 Rx1-Rx3 Rx1-Rx3 Rx1-Rx3 Symbol Voff Von-Voff 1.35 0.75 1.80 1.00 2.35 1.25 Unit
This range input voltages specified 232-E cause receiver high logic state.
MC145406
ELECTRICAL SPECIFICATIONS (Voltage polarities referenced 85°C)
Characteristic Digital Input Voltage Logic Logic Input Current VDI1-DI3 DI1-DI3 DI1-DI3 10.0 10.3 Symbol Unit
Output High Voltage (VDI1-3 Logic Tx1-Tx3 12.0 12.0 Output Voltage* (VDI1-3 Logic Tx1-Tx3 12.0 12.0 Source Resistance (Figure VTx1-Tx3 Tx1-Tx3
Output Short-Circuit Current (VDD 12.0 12.0 Tx1-Tx3 Tx1-Tx3 shorted GND** Tx1-Tx3 shorted 15.0 V***
voltage specifications terms absolute values. Specification output shorted time. Should three driver outputs shorted simultaneously, device power dissipation limits will exceeded. This condition could exceed package limitations.
SWITCHING CHARACTERISTICS (VCC 85°C; Figures TAG) Drivers
Characteristic Propagation Delay Time Low-to-High High-to-Low Output Slew Rate Tx1-Tx3 Minimum Load Maximum Load 2500 Tx1-Tx3 tPLH tPHL V/µs Symbol Unit
Receivers
Characteristic Propagation Delay Time Low-to-High High-to-Low Output Rise Time Output Fall Time DO1-DO3 DO1-DO3 DO1-DO3 tPLH tPHL Symbol Unit
MC145406
DESCRIPTIONS
Positive Power Supply (Pin most positive power supply pin, which typically 12V.
Negative Power Supply (Pin most negative power supply pin, which typically Digital Power Supply (Pin digital supply pin, which connected logic power supply (maximum must less than equal Ground (Pin Ground return typically connected signal ground 232-E connector (Pin well logic power supply ground.
Rout
Figure Power-Off Source Resistance (Drivers)
DRIVERS DI1-DI3 Tx1-Tx3 tPHL tPLH
Rx1, Rx2, Receive Data Input (Pins These 232-E receive signal inputs whose voltages range from (VDD (VSS voltage between (VDD decoded space causes corresponding swing ground voltage between (VDD decoded mark causes swing VCC. actual turn-on input switchpoint typically biased above ground, includes 800mV hysteresis noise rejection. nominal input impedance open grounded input interpreted mark, forcing VCC. DO1, DO2, Data Output (Pins These receiver digital output pins, which swing from GND. space causes produce logic mark produces logic Each output capable driving LSTTL input load. DI1, DI2, Data Input (Pins 12,14) These high-impedance digital input pins drivers. compatibility accomplished biasing input switchpoint above GND. However, CMOS compatibility maintained well. Input voltage levels these pins must between GND. Tx1, Tx2, Transmit Data Output(Pins These 232-E transmit signal output pins, which swing toward VSS. logic input causes corresponding output swing toward VSS. logic causes output swing toward (the output voltages will slightly less than depending upon output load). Output slew rates limited maximum When MC145406 (VDD GND), minimum output impedance
RECEIVERS Rx1-Rx3 tPHL DO1-DO3 tPLH
Figure Switching Characteristics
DRIVERS Tx1-Tx3 tSLH SLEW RATE (SR) tSHL tSLH tSHL
Figure Slew-Rate Characterization
MC145406
APPLICATIONS INFORMATION
MC145406 been designed meet electrical specifications standards 232-E CCITT V.28. 232-E defines electrical physical interface between Data Communication Equipment (DCE) Data Terminal Equipment (DTE). connected using cable that typically carries leads. These leads, referred interchange circuits, allow transfer timing, data, control, test signals. Electrically this transfer requires level shifting between TTL/CMOS logic levels computer modem high voltage levels 232-E, which range from MC145406 provides necessary level shifting well meeting other aspects 232-E specification. DRIVERS defined specification, 232-E driver presents voltage between into load between logic driver input results voltage between logic results voltage between 15V. When operating MC145406 meets this requirement. When operating MC145406 drivers produce less than output (when terminated), which does meet 232-E specification. However, output voltages when using power supply high enough (around permit proper reception 232-E receiver, used applications where strict compliance 232-E required. Another requirement MC145406 drivers that they withstand short another driver 232-E cable. worst-case condition that permitted 232-E source that current limited MC145406 drivers withstand this condition momentarily. most short circuit conditions source driver will have series output impedance needed satisfy 232-E driver requirements. This will reduce short circuit current under which acceptable level MC145406 withstand. Unlike some other drivers, MC145406 drivers feature internally-limited output slew-rate that does exceed RECEIVERS 232-E receiver level-shift voltages range down TTL/CMOS logic levels voltage between defined mark produces logic DO1. voltage between space produces logic zero. While receiving these signals, inputs must present resistance between Nominally, input resistance Rx1-Rx3 inputs input threshold Rx1-Rx3 inputs typically biased above ground (GND) with typically hysteresis included improve noise immunity. bias forces appropriate logic when input open grounded called 232-E specification. Notice that logic levels applied inputs lieu normal 232-E signal levels. This might helpful situations where access modem computer through 232-E connector necessary with devices. However, important connect 232-E outputs (Tx1-Tx3) inputs since operates only, damaged high output voltage MC145406. outputs connected CMOS input (such input modem chip). These outputs will swing from ground, allowing designer operate pins from digital power supply. sections independently powered that logic 232-E signals POWER SUPPLY CONSIDERATIONS Figure shows technique guard against excessive device current. diode prevents excessive current from flowing through internal diode from when approximately This high current condition exist short period time during power up/down. Additionally, supply switched while supply impedance ground, diode will prevent current flow through internal diode. diode used voltage clamp, prevent from drifting positive VCC, event that power removed from (Pin 12). power removed, impedance from ground greater than approximately this will pulled internal circuitry causing excessive current pin. design, neither above conditions allowed exist, then diodes required. PROTECTION protection devices that have their pins accessible outside world essential. High static voltages applied pins when someone touches them either directly indirectly cause damage gate oxides transistor junctions coupling portion energy from power supply buses This coupling will usually occur through internal protection diodes. protecting shunt much energy ground possible before enters Figure shows technique which will clamp voltage approximately using MMVZ15VDLT1. residual voltage which appears supply pins shunted ground through capacitors C1-C3. This scheme provided protection interface part using human body model test.
MC145406
MMBZ15VDLT IN4001 CONNECTOR
MC145406
IN5818
Figure Power Supply Networks
MC145406
DTMF INPUT RDSI CDSI RTLA** Xout RxA1 MODE CCDA** 232-E DB-25 CONNECTOR 3.579 MC145406
MC145442/3
RxA2
RING
600:600
BYPASS BYPASS
CCDT
*Line protection circuit **Refer applications information values CCDA RTLA
Figure 300-Baud Modem with 232-E Interface
MC145406
MC34119 SPEAKER DRIVER
MC145412/13/16 PULSE/TONE DIALER
HOOKSWITCH
MC145503 FILTER/ CODEC
RINGING MC145426 UDLT
LINE INTERFACE (TRANSFORMER PROTECTION)
TWISTED PAIR
SYNC
CONNECTION EXTERNAL TERMINAL
MC145406 RS-232 DRIVER RECEIVER
MC145428 DATA INTERFACE
MC34129 SWITCHING POWER SUPPLY (ISOLATED)
LINE FILTER
Figure Line-Powered Voice/Data Telephone with Electrically Isolated 232-E Interface
MC145406
OUT4 OUT2 4.096 4.096 MC74HC74 2.048 MC74HC393 MC145406 MC14069UB OUT1 OUT3 OUT6 OUT5 MC145428 BRCLK RESET TDC/RDC MC145422 TxSO1 Vref STRAP CONNECTION DISCUSSED EIA-232-D SECTION 1000 RING
DB-25
Figure 80-kbps Limited Distance Modem with 232-E Interface (Master)
*For optional filtering. **TR1 should when this capacitor used.
MC145406
PACKAGE DIMENSIONS
SUFFIX CASE 648-08
-A16 NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: INCH. DIMENSION CENTER LEADS WHEN FORMED PARALLEL. DIMENSION DOES INCLUDE MOLD FLASH. ROUNDED CORNERS OPTIONAL. INCHES 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.070 0.100 0.050 0.008 0.015 0.110 0.130 0.295 0.305 0.020 0.040 MILLIMETERS 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 1.27 0.21 0.38 2.80 3.30 7.50 7.74 0.51 1.01
0.25 (0.010)
SEATING PLANE
STYLE
CATHODE CATHODE CATHODE CATHODE CATHODE CATHODE CATHODE CATHODE ANODE ANODE ANODE ANODE ANODE ANODE ANODE ANODE
STYLE
COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN GATE SOURCE GATE SOURCE GATE SOURCE GATE SOURCE
SUFFIX CASE 751G-02
-A16 NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DIMENSIONS INCLUDE MOLD PROTRUSION. MAXIMUM MOLD PROTRUSION 0.15 (0.006) SIDE. DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.13 (0.005) TOTAL EXCESS DIMENSION MAXIMUM MATERIAL CONDITION. MILLIMETERS 10.15 10.45 7.60 7.40 2.65 2.35 0.49 0.35 0.90 0.50 1.27 0.32 0.25 0.25 0.10 10.05 10.55 0.25 0.75 INCHES 0.400 0.411 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 0.010 0.012 0.004 0.009 0.395 0.415 0.010 0.029
0.25 (0.010)
0.25 (0.010)
SEATING PLANE
MC145406
SUFFIX CASE 940B-02
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS MEASURED PARTING LINE. MOLD FLASH PROTRUSIONS SHALL EXCEED 0.15 (0.006) SIDE. DIMENSION LENGTH TERMINAL SOLDERING SUBSTRATE. TERMINAL POSITIONS SHOWN REFERENCE ONLY. LEAD WIDTH DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.08 (0.003) TOTAL EXCESS LEAD WIDTH DIMENSION. MILLIMETERS 6.10 6.30 5.20 5.38 1.75 1.99 0.25 0.38 0.65 1.00 0.65 0.73 0.90 0.10 0.20 7.65 7.90 0.05 0.21 INCHES 0.240 0.248 0.205 0.212 0.069 0.078 0.010 0.015 0.026 0.039 0.026 0.029 0.035 0.004 0.008 0.301 0.311 0.002 0.008
0.250 (0.010)
NOTE
0.120 (0.005)
0.076 (0.003)
MC145406
Motorola reserves right make changes without further notice products herein. Motorola makes warranty, representation guarantee regarding suitability products particular purpose, does Motorola assume liability arising application product circuit, specifically disclaims liability, including without limitation consequential incidental damages. "Typical" parameters vary different applications. operating parameters, including "Typicals" must validated each customer application customer's technical experts. Motorola does convey license under patent rights rights others. Motorola products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure Motorola product could create situation where personal injury death occur. Should Buyer purchase Motorola products such unintended unauthorized application, Buyer shall indemnify hold Motorola officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that Motorola negligent regarding design manufacture part. Motorola registered trademarks Motorola, Inc. Motorola, Inc. Equal Opportunity/Affirmative Action Employer.
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MC145406
CODELINE PLACED HERE
*MC145406/D*
MC145406/D

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