Philips Semiconductors

Product specification

74ABT16501A

74ABTH16501A

18-bit universal bus transceiver (3-State)

2

1998 Feb 27

853-1788 19027

FEATURES

eliminate the need for external pull-up resistors to hold unused

inputs

and 200V per Machine Model

flip-flops to operate in clocked, transparent, and latched modes.

DESCRIPTION

The 74ABT16501A high-performance BiCMOS device combines low

static and dynamic power dissipation with high speed and high

output drive.

This device is an 18-bit universal transceiver featuring non-inverting

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

Data flow in each direction is controlled by output enable (OEAB and

OEBA), latch enable (LEAB and LEBA), and clock (CPAB and

CPBA) inputs. For A-to-B data flow, the device operates in the

transparent mode when LEAB is High. When LEAB is Low, the A

data is latched if CPAB is held at a High or Low logic level. If LEAB

is Low, the A-bus data is stored in the latch/flip-flop on the

Low-to-High transition of CPAB. When OEAB is High, the outputs

are active. When OEAB is Low, the outputs are in the

high-impedance state.

Data flow for B-to-A is similar to that of A-to-B but uses OEBA,

LEBA and CPBA. The output enables are complimentary (OEAB is

active High, and OEBA is active Low).

Active bus-hold circuitry is provided to hold unused or floating data

inputs at a valid logic level.

Two options are available, 74ABT16501A which does not have the

bus-hold feature and 74ABTH16501A which incorporates the

bus-hold feature.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

Propagation delay

An to Bn or Bn to An

2.2

1.8

ns

Input capacitance (Control pins)

3

pF

I/O pin capacitance

7

pF

Quiescent supply current

500

µA

Quiescent supply current

9

mA

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

OUTSIDE NORTH AMERICA

NORTH AMERICA

DWG NUMBER

56-Pin Plastic SSOP Type III

–40

°C to +85°C

74ABT16501A DL

BT16501A DL

SOT371-1

56-Pin Plastic TSSOP Type II

–40

°C to +85°C

74ABT16501A DGG

BT16501A DGG

SOT364-1

56-Pin Plastic SSOP Type III

–40

°C to +85°C

74ABTH16501A DL

BH16501A DL

SOT371-1

56-Pin Plastic TSSOP Type II

–40

°C to +85°C

74ABTH16501A DGG

BH16501A DGG

SOT364-1