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U74AHC640 Dataheets PDF



Part Number U74AHC640
Manufacturers Unisonic Technologies
Logo Unisonic Technologies
Description OCTAL BUS TRANSCEIVERS
Datasheet U74AHC640 DatasheetU74AHC640 Datasheet (PDF)

UNISONIC TECHNOLOGIES CO., LTD U74HC640 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS „ DESCRIPTION The U74AHC640 is a octal bus transceivers with 3-state outputs. It is designed for asynchronous two-way communication between data buses. Depending on the direction-control (DIR) input, data are transmitted from the A bus to the B bus or from the B bus to the A bus. When OE is high, the buses are effectively isolated. When OE is low, the buses are enable. „ FEATURES * Wide Supply Voltage Range from .

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UNISONIC TECHNOLOGIES CO., LTD U74HC640 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS „ DESCRIPTION The U74AHC640 is a octal bus transceivers with 3-state outputs. It is designed for asynchronous two-way communication between data buses. Depending on the direction-control (DIR) input, data are transmitted from the A bus to the B bus or from the B bus to the A bus. When OE is high, the buses are effectively isolated. When OE is low, the buses are enable. „ FEATURES * Wide Supply Voltage Range from 2V to 6V * Typical tPD of 8ns at 6V, CL=50pF * Low Power Consumption, ICC = 8μA (Max) at 5.5V * ±7.8mA Output Driver at 6V CMOS IC „ ORDERING INFORMATION Ordering Number Lead Free Halogen Free U74AHC640L-R20-R U74AHC640G-R20-R U74AHC640L-R20-T U74AHC640G-R20-T Package SSOP-20 SSOP-20 Packing Tape Reel Tube www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd 1 of 7 QW-R126-008.A U74HC640 „ PIN CONFIGURATION DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 „ FUNCTION TABLE OE L L H INPUTS DIR L H X „ LOGIC DIAGRAM OE 20 VCC 19 OE 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 CMOS IC OPERATION B data to A bus A data to B bus Isolation DIR A1 B1 To seven other transceivers UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R126-008.A U74HC640 CMOS IC „ ABSOLUTE MAXIMUM RATING (unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -0.5~7 V Input Voltage VIN -0.5~7 V Output Voltage Input Clamp Current (VIN<0) VOUT IIK -0.5~VCC +0.5 ±20 V mA Output Clamp Current (VOUT<0, or VOUT>VCC) IOK ±20 mA Output Current VCC or GND Current IOUT ±35 mA ICC ±70 mA Storage Temperature TSTG -65 ~ +150 °C Note: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. „ RECOMMENDED OPERATING COMDITIONS PARAMETER Supply Voltage High-Level Input Voltage Low-Level Input Voltage Input Voltage Output Voltage Input Transition Rise or Fall Rate Operating Temperature SYMBOL VCC VIH VIL VIN VOUT Δt/Δv TA CONDITIONS VCC = 2V VCC = 4.5V VCC = 6V VCC = 2V VCC = 4.5V VCC = 6V VCC = 2V VCC = 4.5V VCC = 6V MIN 2 1.5 3.15 4.2 TYP 5 0 0 -40 „ ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified) MAX UNIT 6V V 0.5 1.35 1.8 VCC VCC 1000 500 400 85 V V V ns/V °C PARAMETER High-Level Output Voltage Low-Level Output Voltage Input Leakage Current(DIR or OE ) High-Impedance State Current (A or B) Quiescent Supply Current Input Capacitance (DIR or OE ) SYMBOL VOH VOL II(LEAK) IOZ ICC CIN TEST CONDITIONS IOH = -20μA, VCC = 2V IOH = -20μA, VCC = 4.5V IOH = -20μA, VCC = 6V IOH = -6mA, VCC = 4.5V IOH = -7.8mA, VCC = 6V IOL = 20μA, VCC = 2V IOL = 20μA, VCC = 4.5V IOL = 20μA, VCC = 6V IOL = 6mA, VCC = 4.5V IOL = 7.8mA, VCC = 6V VIN = VCC or 0, VCC = 6V VOUT = VCC or 0, VCC = 6V VIN=VCC or 0,IOUT=0,VCC=6V VIN=VCC or 0,VCC=2V to 6V MIN 1.9 4.4 5.9 3.98 5.48 TYP 1.998 4.499 5.999 4.3 5.8 0.002 0.001 0.001 0.17 0.15 ±0.1 ±0.01 3 MAX 0.1 0.1 0.1 0.26 0.26 ±100 ±0.5 8 10 UNIT V V μA μA μA pF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R126-008.A U74HC640 „ SWITCHING CHARACTERISTICS (TA =25°C) CL=50pF, RL=1kΩ PARAMETER Propagation Delay from A to B or B to A Enable Times from OE to A or B Disable Times from OE to A or B Output Rise or fall Time CL=150pF, RL=1kΩ PARAMETER Propagation Delay from A to B or B to A Enable Times from OE to A or B OUTPUT rise or fall Time SYMBOL tPD tEN tDIS tT TEST CONDITIONS VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V SYMBOL tPD tEN tT TEST CONDITIONS VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V „ OPERATING CHARACTERISTICS (TA =25°C) PARAMETER Power Dissipation Capacitance SYMBOL TEST CONDITIONS CPD No load CMOS IC MIN TYP MAX UNIT 29 105 10 21 ns 8 18 109 230 27 46 ns 20 39 40 150 18 30 ns 16 26 20 60 8 12 ns 6 10 MIN TYP MAX UNIT 44 190 14 38 ns 11 33 124 315 31 63 ns 23 54 45 210 17 42 ns 13 36 TYP UNIT 40 pF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R126-008.A U74HC640 „ TEST CIRCUIT AND WAVEFORMS CMOS IC VCC 3.3V±0.3V 5V±0.5V Input VIN tR, tF VCC ≤3ns VCC ≤3ns TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH S1 Open VLOAD GND VM VCC/2 VCC/2 VLOAD VCC VCC CL 50pF 150pF 50pF 150pF RL 1kΩ 1kΩ Input 90% 90% VCC 10% tR 10% 0V tF Voltage Waveforms Input Rise and Fall Times VΔ 0.3V 0.5V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 7 QW-R126-008.A U74HC640 „ TEST CIRCUIT AND WAVEFORMS(Cont.) CMOS IC Input VM tPLH VIN VM 0V tPHL Output 10% tPHL tR 90% VM 90% VM 10% tPLH tF VOH VOL Output 90% VM 10% tF 10% 90% VM VOH VOL tR Voltage Waveforms Propagation Delay and Output Transition Times Input VM tPZL VM t.


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