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HD74BC645A

Renesas
Part Number HD74BC645A
Manufacturer Renesas
Description Octal Bus Transceivers
Published Nov 7, 2014
Detailed Description HD74BC645A Octal Bus Transceivers With 3 State Outputs REJ03D0291–0200Z (Previous ADE-205-027 (Z)) Rev.2.00 Jul.16.2004 ...
Datasheet PDF File HD74BC645A PDF File

HD74BC645A
HD74BC645A

Overview
HD74BC645A Octal Bus Transceivers With 3 State Outputs REJ03D0291–0200Z (Previous ADE-205-027 (Z)) Rev.
2.
00 Jul.
16.
2004 Description The HD74BC645A provides high drivability and operation equal to or better than high speed bipolar standard logic IC by using Bi-CMOS process.
The device features low power dissipation that is about 1/5 of high speed bipolar logic IC.
When the frequency is 10 MHz.
The device has eight bus transceivers with three state outputs in a 20 pin package.
Each device has an active low enable input (G) and a direction control input, DiR.
When DiR is high, data flows from the A inputs to the B outputs.
When DiR is high, data flows from the B inputs to the A outputs.
When enable inputs (G) is high, disables both A and B ports by placing then in a high impedance.
Features • Input/Output are at high impedance state when power supply is off.
• Input pins can be open, when not used, owing to built in input pull up circuit.
• Input is TTL level.
• Wide operating temperature range Ta = –40 to +85°C.
• Ordering Information Part Name HD74BC645AFPEL Package Type Package Code FP Package Abbreviation Taping Abbreviation (Quantity) EL (2,000 pcs/reel) SOP-20 pin (JEITA) FP-20DAV Function Table Control Inputs G L L H H L X Z : : : : High level Low level Immaterial High impedance L H X DIR B data to A bus A data to B bus Z Operation Rev.
2.
00, Jul.
16.
2004, page 1 of 7 HD74BC645A Pin Arrangement DiR A1 A2 A3 A4 A5 A6 A7 A8 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC G B1 B2 B3 B4 B5 B6 B7 B8 (Top view) Absolute Maximum Ratings Item Supply voltage Input diode current Input voltage Output voltage VCC IIK VIN VOUT Symbol Rating –0.
5 to +7.
0 ±30 –0.
5 to +7.
5 –0.
5 to +7.
5 V mA V V Unit Off state output voltage VOUT(off) –0.
5 to +5.
5 V Storage temperature Tstg –65 to +150 °C Note: 1.
The absolute maximum ratings are values which must not individually be exceeded, and furthermore, no two of which may be realized at the same time.
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