7LVC623APWDH datasheet(2/10 Pages) PHILIPS

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Philips Semiconductors

Product specification

74LVC623A

Octal transceiver with dual enable (3-State)

1998 Jul 29

853-2106 19803

FEATURES

• Wide supply voltage range of 1.2V to 3.6V

• In accordance with JEDEC standard no. 8-1A

• Flow-through pin-out architecture

• CMOS low power consumption

• Inputs accept voltages up to 5.5V

• Direct interface with TTL levels

• Output drive capability 50W transmission lines @ 85°C

DESCRIPTION

The 74LVC623A is a high performance, low-power, low-voltage

Si-gate CMOS device, superior to most advanced CMOS

compatible TTL families.

The 74LVC623A is an octal transceiver featuring non-inverting

3-State bus compatible outputs in both send and receive directions.

This octal bus transceiver is designed for asynchronous two-way

communication between data buses.

The control function implementation allows maximum flexibility in

timing. This device allows data transmission from the A bus to the B

bus or from the B bus to the A bus, depending upon the levels at the

enable inputs (OEAB, OEBA). The enable inputs can be used to

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

dual enable function configuration gives this transceiver the

capability to store data by simultaneous enabling of OEAB and

OEBA. Each output reinforces its input in this transceiver

configuration. Thus, when both control inputs are enabled and all

other data sources to the two sets of the bus lines are at high

impedance OFF-state, both sets of bus lines will remain at their last

states. The 8-bit codes appearing on the two sets of buses will be

identical.

The ‘623A’ is identical to the ‘620A’ but has true (non-inverting)

outputs.

QUICK REFERENCE DATA

GND = 0V; Tamb = 25°C; tr = tf v2.5 ns

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

tPHL/tPLH

Propagation delay

An to Bn; Bn to An

CL = 50pF

VCC = 3.3V

3.3

Input capacitance

5.0

CI/O

Input/output capacitance

CPD

Power dissipation capacitance per latch

Notes 1, 2

NOTES:

1. CPD is used to determine the dynamic power dissipation (PD in µW)

PD = CPD

VCC2 x fi )Σ (CL

VCC2

fo) where:

fi = input frequency in MHz; CL = output load capacity in pF;

fo = output frequency in MHz; VCC = supply voltage in V;

Σ (CL

VCC2

fo) = sum of the outputs.

2. The condition is VI = GND to VCC.

ORDERING AND PACKAGE INFORMATION

PACKAGES

TEMPERATURE RANGE

OUTSIDE NORTH

AMERICA

NORTH AMERICA

PKG. DWG. #

20-Pin Plastic SO

–40

°C to +85°C

74LVC623A D

SOT163-1

20-Pin Plastic SSOP Type II

–40

°C to +85°C

74LVC623A DB

SOT339-1

20-Pin Plastic TSSOP Type I

–40

°C to +85°C

74LVC623A PW

7LVC623APW DH

SOT360-1

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