UNISONIC TECHNOLOGIES CO., LTD U74HCT640 CMOS IC OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SOP-20 DESCRIPTION The U74HCT640 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 B bus to the A bus. When OE is high, the buses are effectively isolated. When SSOP-20 OE is low, the buses are enable. TSSOP-20 FEATURES * Inputs are TTL-voltage compatible * Typical tPD of 12ns at 5.5V, CL=50pF * Low power consumption, ICC = 8μA (Max) at 5.5V * ±6mA output driver at 4.5V ORDERING INFORMATION Ordering Number Lead Free U74HCT640L-P20-R U74HCT640L-P20-T U74HCT640L-R20-R U74HCT640L-R20-T U74HCT640L-S20-R U74HCT640L-S20-T Halogen Free U74HCT640G-P20-R U74HCT640G-P20-T U74HCT640G-R20-R U74HCT640G-R20-T U74HCT640G-S20-R U74HCT640G-S20-T www.unisonic.com.tw Copyright © 2012 Unisonic Technologies Co., Ltd Package Packing TSSOP-20 TSSOP-20 SSOP-20 SSOP-20 SOP-20 SOP-20 Tape Reel Tube Tape Reel Tube Tape Reel Tube 1 of 6 QW-R502-684.B U74HCT640 CMOS IC PIN CONFIGURATION FUNCTION TABLE (each buffer) INPUTS OE DIR L L H L H X OPERATION B data to A bus A data to B bus Isolation LOGIC DIAGRAM (positive logic) OE DIR A1 B1 To seven other transceivers UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-684.B U74HCT640 CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -0.5~7 V Input Voltage VIN -0.5~7 V Output Voltage VOUT -0.5 ~ VCC+0.5 V Input Clamp Current (VIN<0) IIK ±20 mA Output Clamp Current (VOUT<0, or VOUT>VCC) IOK ±20 mA Output Current IOUT ±35 mA VCC or GND Current 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 CONDITIONS VCC VIH VCC = 4.5V to 5.5V VIL VCC = 4.5V to 5.5V VIN VOUT Δt/Δv VCC = 4.5V TA MIN 4.5 2 0 0 0 0 -40 TYP 5 MAX 5.5 0.8 VCC VCC 500 85 UNIT V V V V V ns/V °C TYP 4.499 4.30 0.001 0.17 MAX UNIT 0.1 0.26 V VIN = VCC or 0, VCC = 5.5V ±0.1 ±100 μA IOZ VOUT = VCC or 0, VCC = 5.5V ±0.01 ±0.5 μA ICC VIN=VCC or 0, IOUT = 0, VCC = 5.5V One input at 0.5V or 2.4V, other inputs at 0V or VCC, VCC =5.5V VIN = VCC or 0, VCC=4.5V to 5.5V 8 μA 1.4 2.4 mA 3 10 pF ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified) PARAMETER SYMBOL High-Level Output Voltage VOH Low-Level Output Voltage VOL Input Leakage Current (DIR or OE ) High-Impedance State Current (A or B) Quiescent Supply Current Additional Quiescent Supply Current Input Capacitance (DIR or OE ) II(LEAK) ΔICC CIN TEST CONDITIONS IOH = -20μA, VCC = 4.5V IOH = -6mA, VCC = 4.5V IOL = 20μA, VCC = 4.5V IOL = 6mA, VCC = 4.5V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 4.4 3.98 V 3 of 6 QW-R502-684.B U74HCT640 CMOS IC SWITCHING CHARACTERISTICS (TA =25°C) PARAMETER SYMBOL Propagation delay from A to B or B to A tPD Enable times from OE to A or B tEN Disable times from OE to A or B tDIS Output rise or fall time tT MIN TYP MAX UNIT 14 21 ns 12 18 27 35 ns 24 32 20 30 ns 18 26 9 12 ns 8 11 SWITCHING CHARACTERISTICS (TA =25°C) PARAMETER SYMBOL Propagation delay from A to B or B to A tPD Enable times from OE to A or B tEN Output rise or fall time tT TEST CONDITIONS VCC=4.5V, CL=50pF, RL=1kΩ VCC=5.5V, CL=50pF, RL=1kΩ VCC=4.5V, CL=50pF, RL=1kΩ VCC=5.5V, CL=50pF, RL=1kΩ VCC=4.5V, CL=50pF, RL=1kΩ VCC=5.5V, CL=50pF, RL=1kΩ VCC=4.5V, CL=50pF, RL=1kΩ VCC=5.5V, CL=50pF, RL=1kΩ TEST CONDITIONS VCC=4.5V, CL=150pF, RL=1kΩ VCC=5.5V, CL=150pF, RL=1kΩ VCC=4.5V, CL=150pF, RL=1kΩ VCC=5.5V, CL=150pF, RL=1kΩ VCC=4.5V, CL=150pF, RL=1kΩ VCC=5.5V, CL=150pF, RL=1kΩ MIN TYP MAX UNIT 17 27 ns 15 24 31 45 ns 28 41 17 42 ns 14 38 OPERATING CHARACTERISTICS (TA =25°C) PARAMETER Power dissipation capacitance SYMBOL TEST CONDITIONS CPD No load UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP 40 UNIT pF 4 of 6 QW-R502-684.B U74HCT640 CMOS IC TEST CIRCUIT AND WAVEFORMS VCC 5V±0.5V Input VIN tR, tF VCC ≤6ns TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH S1 Open VLOAD GND VM VLOAD CL RL VΔ VCC/2 VCC 50pF 150pF 1kΩ 0.5V 90% VCC 90% Input 10% 10% tR UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw tF 0V 5 of 6 QW-R502-684.B U74HCT640 CMOS IC TEST CIRCUIT AND WAVEFORMS(Cont.) VIN Input VM VM tPLH tPHL 0V 90% VM Output VOH 90% VM 10% 10% tR tF tPHL 90% Output VOL tPLH V M 10% 10% 90% VM tR tF Voltage Waveforms Propagation Delay and Output Transition Times VOH VOL VIN Input V V M M tPZL 0 V tPLZ VLOAD V Output M S1 at VLOAD tPZH VOL tPHZ V Output S1 at GND VOL+VΔ VOH+VΔ VOH M 0V Voltage Waveforms Enable and Disable Times Notes: 1. CL includes probe and jig capacitance. 2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, ZO = 50Ω, tR=6ns, tF=6ns. 3. tPLH and tPHL are the same as tPD . 4. tPLZ and tPHZ are the same as tDIS . 5. tPZH and tPZL are the same as tEN . UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R502-684.B