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MC74VHC245DT

Octal Bus Transcei

ON Semiconductor 

ON Semiconductort

Octal Bus Transceiver

The MC74VHC245 is an advanced high speed CMOS octal bus

transceiver fabricated with silicon gate CMOS technology. It achieves

high speed operation similar to equivalent Bipolar Schottky TTL

while maintaining CMOS low power dissipation.

It is intended for two−way asynchronous communication between

data buses. The direction of data transmission is determined by the

level of the DIR input. The output enable pin (OE) can be used to

disable the device, so that the buses are effectively isolated.

All inputs are equipped with protection circuits against static

discharge.

• High Speed: tPD = 4.0ns (Typ) at VCC = 5V

• Low Power Dissipation: ICC = 4μA (Max) at TA = 25°C

• High Noise Immunity: VNIH = VNIL = 28% VCC

• Power Down Protection Provided on Inputs

• Balanced Propagation Delays

• Designed for 2V to 5.5V Operating Range

• Low Noise: VOLP = 1.2V (Max)

• Pin and Function Compatible with Other Standard Logic Families

• Latchup Performance Exceeds 300mA

• ESD Performance: HBM > 2000V; Machine Model > 200V

• Chip Complexity: 308 FETs or 77 Equivalent Gates

w These devices are available in Pb−free package(s). Specifications herein

apply to both standard and Pb−free devices. Please see our website at

www.onsemi.com for specific Pb−free orderable part numbers, or

contact your local ON Semiconductor sales office or representative.

APPLICATION NOTES

• Do not force a signal on an I/O pin when it is an active output,

damage may occur.

• All floating (high impedance) input or I/O pins must be fixed by

means of pull up or pull down resistors or bus terminator ICs.

• A parasitic diode is formed between the bus and VCC terminals.

Therefore, the VHC245 cannot be used to interface 5V to 3V systems

directly.

MC74VHC245

DW SUFFIX

20−LEAD SOIC WIDE PACKAGE

CASE 751D−05

DT SUFFIX

20−LEAD TSSOP PACKAGE

CASE 948E−02

M SUFFIX

20−LEAD SOIC EIAJ PACKAGE

CASE 967−01

ORDERING INFORMATION

MC74VHCXXXDW SOIC WIDE

MC74VHCXXXDT TSSOP

MC74VHCXXXM

SOIC EIAJ

© Semiconductor Components Industries, LLC, 2006

1

March, 2006 − Rev. 5

Publication Order Number:

MC74VHC245/D

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