PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS PI74LPT16952
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1OEBA 2OEBA
PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS
PI74LPT16952
Fast CMOS 3.3V 16-Bit Registered Transceivers
Product Features
Compatible with LCXand LVTfamilies products Supports Tolerant Mixed Signal Mode Operation Input Output connected Advanced Power CMOS Operation Excellent output drive capability: Balanced drives sink source) compatible with industry standard double-density pinouts ground bounce outputs Hysteresis inputs Industrial operating temperature range: -40°C +85°C Multiple center pins distributed Vcc/GND pins minimize switching noise Packages available: 56-pin wide plastic TSSOP 56-pin wide plastic SSOP
Product Description
Pericom Semiconductor's PI74LPT series logic circuits produced Company's advanced micron CMOS technology, achieving industry leading speed grades. PI74LPT16952 16-bit registered transceivers organized with sets eight D-type latches with separate input output controls each set. data flow from example, Ato-B Enable (xCEAB) input must enter data from xAx. data present port will clocked register when xCLKAB toggles from LOW-to-HIGH. xOEAB control performs output enable function port. Control data from similar, uses xCEAB, xCLKAB, xOEAB inputs. connecting control pins independent transceivers together, full 16-bit operation achieved. output buffers designed with Power-Off disable allowing "live insertion" boards when used backplane drivers. PI74LPT16952 driven from either 3.3V 5.0V devices allowing this device used translator mixed 3.3/5.0V system.
1CEBA
2CEBA
1CLKBA 1OEAB 1CEAB
2CLKBA 2OEAB 2CEAB
1CLKAB
2CLKAB
OTHER CHANNELS
OTHER CHANNELS
PS2076A 02/4/97
Product Description
Name xOEAB xOEBA xCEAB xCEBA xCLKAB xCLKBA Description A-to-B Output Enable Input (Active LOW) B-to-A Output Enable Input (Active LOW) A-to-B Clock Enable Input (Active LOW) B-to-A Clock Enable Input (Active LOW) A-to-B Clock Input B-to-A Clock Input A-to-B Data Inputs B-to-A 3-State Outputs B-to-A Data Inputs B-to-A 3-State Outputs Ground Power
Product Configuration
1OEAB 1CLKAB 1CEAB
PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS
Truth Table(1,2)
Inputs
XCEAB XCLKAB XOEAB
Outputs B(3) B(3) High
Notes: High Voltage Level Voltage Level Don't Care Irrelevant LOW-to-HIGH Transition High Impedance A-to-B data flow shown. B-to-A flow control same, except using xCEBA, xCLKBA, xOEBA. Level before indicated steady-state input conditions were established.
1OEBA 1CLKBA 1CEBA
56-PIN
2CEAB 2CLKAB 2OEAB
2CEBA 2CLKBA 2OEBA
PS2076A 02/4/97
PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS
Maximum Ratings
(Above which useful life impaired. user guidelines, tested.) Storage Temperature -55°C +125°C Ambient Temperature with Power Applied -40°C +85°C Supply Voltage Ground Potential (Inputs Only) -0.5V +7.0V Supply Voltage Ground Potential (Outputs Only) -0.5V +7.0V Input Voltage -0.5V +7.0V Output Current Power Dissipation .1.0W Note: Stresses greater than those listed under MAXIMUM RATINGS cause permanent damage device. This stress rating only functional operation device these other conditions above those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect reliability.
Electrical Characteristics (Over Operating Range, -40°C +85°C, 2.7V 3.6V)
Parameters IOZH IOZL IODH IODL Description Input HIGH Voltage (Input pins) Input HIGH Voltage (I/O pins) Input Voltage (Input pins) Input HIGH Current (Input pins) Input HIGH Current (I/O pins) Input Current (Input pins) Input Current (I/O pins) High Impedance Output Current (3-State Output pins) Clamp Diode Voltage Output HIGH Current Output Current Output HIGH Voltage Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic Level Min. -0.5 Typ(2) Max. -1.2 -110 -240 ±100 Units
Output Voltage
IOFF
Short Circuit Current(4) Power Down Disable Input Hysteresis
Max. 5.5V Max. Max. Max. Max. VOUT 5.5V Max. VOUT Min., 3.3V, VIL, 1.5V(3) 3.3V, VIL, 1.5V Min. -0.1 Vcc-0.2 3.0V 2.4(5) Min. =0.1 Max. VOUT VOUT 4.5V
Notes: Max. Min. conditions, appropriate value specified under Electrical Characteristics applicable device type. Typical values 3.3V, +25°C ambient maximum loading. more than output should shorted time. Duration test should exceed second. This parameter guaranteed tested. 0.6V rated current.
PS2076A 02/4/97
PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS
Power Supply Characteristics
Parameters Description ICCD Quiescent Power Supply Current Quiescent Power Supply Current Inputs HIGH Dynamic Power Supply(4) Test Conditions(1) Max. Max. Max., Outputs Open Toggling Duty Cycle Max., Outputs Open Duty Cycle Toggling Max., Outputs Open Duty Cycle Bits Toggling 0.6V(3) Min. Typ(2) Max. Units
Total Power Supply Current(6)
0.6V
0.6V
4.7(5)
Notes: Max. Min. conditions, appropriate value specified under Electrical Characteristics applicable device. Typical values 3.3V, +25°C ambient. driven input; other inputs GND. This parameter directly testable, derived Total Power Supply Calculations. Values these conditions examples formula. These limits guaranteed tested. =IQUIESCENT IINPUTS IDYNAMIC DHNT ICCD (fCP/2 fINI) Quiescent Current (ICCL, ICCH ICCZ) Power Supply Current High Input Duty Cycle Inputs High Number Inputs ICCD Dynamic Current Caused Input Transition Pair (HLH LHL) Clock Frequency Register Devices (Zero Non-Register Devices) Number Clock Inputs Input Frequency Number Inputs currents milliamps frequencies megahertz.
PS2076A 02/4/97
PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS
Switching Characteristics over Operating Range(1)
LPT16952A Com.
Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ Description Propagation Delay XCLKAB, XCLKBA XBX, Output Enable Time XOEBA, XOEAB XAX, Output Disable Time(4) XOEBA, XOEAB XAX, Set-up Time HIGH xAx, xCLKAB, xCLKBA Hold Time HIGH xAx, xCLKAB, xCLKBA Setup Time HIGH xCEAB, xCEBA xCLKAB, xCLKBA Hold Time HIGH xCEAB, xCEBA xCLKAB, xCLKBA Pulse Width HIGH(4) LOW, xCLKAB xCLKBA Output Skew(5) Conditions(2) Min.(3) Max. 10.0 10.5 10.0
LPT16952B Com.
Min.(3) Max.
LPT16952C Com.
Min.(3) Max. Units
tSK(o)
Notes: Propagation Delays Enable/Disable times with 3.3V ±0.3V, normal range. 2.7V, extended range, Propagation Delays Enable/Disable times should degraded 20%. test circuit wave forms. Minimum limits guaranteed tested Propagation Delays. This parameter guaranteed production tested. Skew between outputs, same package, switching same direction. This parameter guaranteed design.
Capacitance 25°C, MHz)
Parameters(1) COUT Description Input Capacitance Output Capacitance Test Conditions VOUT Typ. Max. Units
Note: This parameter determined device characterization production tested.
Pericom Semiconductor Corporation 2380 Bering Drive Jose, 95131 1-800-435-2336 (408) 435-1100 http://www.pericom.com
PS2076A 02/4/97
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