74ABT16841 Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Lista de partido

74ABT16841

20-bit bus interface latch (3-State)

Philips Electronics 

Philips Semiconductors

20-bit bus interface latch (3-State)

Product specification

74ABT16841A

74ABTH16841A

FEATURES

• High speed parallel latches

• Live insertion/extraction permitted

• Extra data width for wide address/data paths or buses carrying

parity

• Power-up 3-State

• 74ABTH16841A incorporates bus-hold data inputs which

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

inputs

• Power-up reset

• Ideal where high speed, light loading, or increased fan-in are

required with MOS microprocessors

• Output capability: +64mA/–32mA

• Latch-up protection exceeds 500mA per Jedec Std 17

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

and 200V per Machine Model

DESCRIPTION

The 74ABT16841A Bus interface latch is designed to provide extra

data width for wider data/address paths of buses carrying parity.

The 74ABT16841A consists of two sets of ten D-type latches with

3-State outputs. The flip-flops appear transparent to the data when

Latch Enable (nLE) is High. This allows asynchronous operation, as

the output transition follows the data in transition. On the nLE

High-to-Low transition, the data that meets the setup and hold time

is latched.

Data appears on the bus when the Output Enable (nOE) is Low.

When nOE is High the output is in the High-impedance state.

Two options are available, 74ABT16841A which does not have the

bus-hold feature and 74ABTH16841A which incorporates the

bus-hold feature.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

tPLH

tPHL

CIN

COUT

ICCZ

ICCL

Propagation delay

nDx to nQx

Input capacitance

Output capacitance

Quiescent supply current

CONDITIONS

Tamb = 25°C; GND = 0V

CL = 50pF; VCC = 5V

VI = 0V or VCC

VO = 0V or VCC; 3-State

Outputs disabled; VCC = 5.5V

Outputs LOW; VCC = 5.5V

TYPICAL UNIT

3.1

2.2

ns

4

pF

7

pF

500

µA

10

mA

ORDERING INFORMATION

PACKAGES

56-Pin Plastic SSOP Type III

56-Pin Plastic TSSOP Type II

56-Pin Plastic SSOP Type III

56-Pin Plastic TSSOP Type II

TEMPERATURE RANGE OUTSIDE NORTH AMERICA

–40°C to +85°C

74ABT16841A DL

–40°C to +85°C

74ABT16841A DGG

–40°C to +85°C

74ABTH16841A DL

–40°C to +85°C

74ABTH16841A DGG

NORTH AMERICA

BT16841A DL

BT16841A DGG

BH16841A DL

BH16841A DGG

DWG NUMBER

SOT371-1

SOT364-1

SOT371-1

SOT364-1

PIN DESCRIPTION

PIN NUMBER

55, 54, 52, 51, 49, 48, 47, 45, 44, 43

42, 41, 40, 38, 37, 36, 34, 33, 31, 30

2, 3, 5, 6, 8, 9, 10, 12, 13, 14

15, 16, 17, 19, 20, 21, 23, 24, 26, 27

1, 28

56, 29

4, 11, 18, 25, 32, 39, 46, 53

7, 22, 35, 50

SYMBOL

1D0 – 1D9

2D0 – 2D9

1Q0 – 1Q9

2Q0 – 2Q9

1OE, 2OE

1LE, 2LE

GND

VCC

Data inputs

FUNCTION

Data outputs

Output enable inputs (active-Low)

Latch enable inputs (active rising edge)

Ground (0V)

Positive supply voltage

1998 Feb 27

2

853-1797 19025

Share Link: