74ALVT16652 datasheet(2/14 Pages) PHILIPS

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Philips Semiconductors

Product specification

74ALVT16652

2.5V/3.3V 16-bit bus transceiver/register

(3-State)

1998 Feb 13

853-1854 18962

FEATURES

• 16–bit bus interface

• 5V I/O Compatible

• 3-State buffers

• Output capability: +64mA/-32mA

• TTL input and output switching levels

• Input and output interface capability to systems at 5V supply

• Bus-hold data inputs eliminate the need for external pull-up

resistors to hold unused inputs

• Live insertion/extraction permitted

• Power-up reset

• Power-up 3-State

• No bus current loading when output is tied to 5V bus

• Latch-up protection exceeds 500mA per JEDEC JC40.2 Std 17

• ESD protection exceeds 2000V per MIL STD 883 Method 3015

and 200V per Machine Model

DESCRIPTION

The 74ALVT16652 is a high-performance BiCMOS product

designed for VCC operation at 2.5V or 3.3V with I/O compatibility up

to 5V. The device can be used as two 8-bit transceivers or one

16-bit transceiver.

Complimentary output-enable (OEAB and OEBA) inputs are

provided to control the transceiver functions. Select-control (SAB

and SBA) inputs are provided to select whether real-time or stored

data is transferred. A Low-input level selects real-time data, and a

High input level selects stored data. The circuitry used for select

control eliminates the typical decoding glitch that occurs in a

multiplexer during the transition between stored and real-time data.

Data on the A or B bus, or both, can be stored in the internal

flip-flops by Low-to-High transitions at the appropriate clock (CPAB

or CPBA) inputs regardless of the levels on the select-control or

output-enable inputs. When SAB and SBA are in real-time transfer

mode, it is possible to store data without using the internal D-type

flip-flops by simultaneously enabling OEAB and OEBA. In this

configuration, each output reinforces its input. Thus, when all other

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

each set of bus lines remains at its last level configuration.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

SYMBOL

PARAMETER

Tamb = 25°C

2.5V

3.3V

UNIT

tPLH

tPHL

Propagation delay

nAx to nBx or nBx to nAx

CL = 50pF

2.0

2.1

1.5

1.6

CIN

Input capacitance DIR, OE

VI = 0V or VCC

CI/O

I/O pin capacitance

VI/O = 0V or VCC

ICCZ

Total supply current

Outputs disabled

µA

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

OUTSIDE NORTH AMERICA

NORTH AMERICA

DWG NUMBER

56-Pin Plastic SSOP Type III

–40

°C to +85°C

74ALVT16652 DL

AV16652 DL

SOT371-1

56-Pin Plastic TSSOP Type II

–40

°C to +85°C

74ALVT16652 DGG

AV16652 DGG

SOT364-1

LOGIC SYMBOL (IEEE/IEC)

EN1(BA)

EN2(AB)

43D

11D 12

1 12

EN7(BA)

EN8(AB)

G10

C11

G12

SW00158

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