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HD74HC640

Renesas
Part Number HD74HC640
Manufacturer Renesas
Description Octal Bus Transceivers
Published Apr 4, 2016
Detailed Description HD74HC640, HD74HC643 Octal Bus Transceivers (with 3-state outputs) REJ03D0637-0200 (Previous ADE-205-517) Rev.2.00 Mar...
Datasheet PDF File HD74HC640 PDF File

HD74HC640
HD74HC640

Overview
HD74HC640, HD74HC643 Octal Bus Transceivers (with 3-state outputs) REJ03D0637-0200 (Previous ADE-205-517) Rev.
2.
00 Mar 30, 2006 Description Each device has an active enable G and a direction control input, DIR.
When DIR is high, data flows from the A inputs to the B outputs.
When DIR is low, data flows from the B inputs to the A outputs.
The HD74HC640 transfers inverted data from one bus to other and the HD74HC643 transfers inverted data from the A bus to the B bus and true data from the B bus to the A bus.
Features • High Speed Operation: tpd = 12 ns typ (CL = 50 pF) • High Output Current: Fanout of 15 LSTTL Loads • Wide Operating Voltage: VCC = 2 to 6 V • Low Input Current: 1 µA max • Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) • Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation HD74HC640P DILP-20 pin PRDP0020AC-B (DP-20NEV) P HD74HC640FPEL SOP-20 pin (JEITA) PRSP0020DD-B (FP-20DAV) FP HD74HC640RPEL SOP-20 pin (JEDEC) HD74HC643RPEL PRSP0020DC-A RP (FP-20DBV) Note: Please consult the sales office for the above package availability.
Taping Abbreviation (Quantity) — EL (2,000 pcs/reel) EL (1,000 pcs/reel) Function Table Control Inputs G DIR LL LH HX H : high level L : low level X : irrelevant HD74HC640 B data to A bus A data to B bus Isolation Operation HD74HC643 B data to A bus A data to B bus Isolation Rev.
2.
00 Mar 30, 2006 page 1 of 10 HD74HC640, HD74HC643 Pin Arrangement HD74HC640 HD74HC643 DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 (Top View) 20 VCC 19 Enable G 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 (Top View) 20 VCC 19 Enable G 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 Rev.
2.
00 Mar 30, 2006 page 2 of 10 HD74HC640, HD74HC643 Logic Diagram HD74HC640 G DIR A VCC VCC B HD74HC643 G DIR A To 7 Other Inverters To 7 Other Inverters VCC VCC B To 7 Other Inverters To 7 Other Inverter...


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