Philips Semiconductors

Product specification

74ABT16260

74ABTH16260

12-bit to 24-bit multiplexed D-type latches (3-State)

2

1998 Feb 10

853-2048-18945

FEATURES

exceeds 200V using machine model (C = 200pF, R = 0).

JESD-17.

switching noise.

need for external pull-up resistors.

– 56-pin plastic Shrink Small-Outline Package (SSOP)

– 56-pin plastic Thin Shrink Small-Outline Package (TSSOP)

DESCRIPTION

The 74ABT16260/74ABTH16260 is a 12-bit to 24-bit multiplexed

D-type latch used in applications where two separate data paths

must be multiplexed onto, or demultiplexed from, a single data path.

Typical applications include multiplexing and/or demultiplexing of

address and data information in microprocessor or bus-interface

applications. This device is alto useful in memory-interleaving

applications.

Three 12-bit I/O ports (A1–A12, 1B1–1B12, and 2B1–2B12) are

available for address and/or data transfer. The output enable (OE1B,

OE2B, and OEA) inputs control the bus transceiver functions. The

OE1B and OE2B control signals also allow bank control in the A to

B direction.

Address and/or data information can be stored using the internal

storage latches. The latch enable (LE1B, LE2B, LEA1B, and

LEA2B) inputs are used to control data storage. When the latch

enable input is high, the latch is transparent. When the latch enable

input goes low, the data present at the inputs is latched and remains

latched until the latch enable input is returned high.

To ensure the high-impedance state during power-up or

the minimum value of the resistor is determined by the current

sinking capability of the driver.

The 74ABTH incorporates the bus hold feature. The 74ABT does

not include bus hold feature. Both parts are available in 56-pin

SSOP and TSSOP.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

Propagation delay

C =50 pF

2.8

ns

nAx to nBx

nBx to nAx

2.5

ns

Input capacitance

4

pF

Output capacitance

6

pF

Total supply current

Outputs disabled

100

µA

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

OUTSIDE NORTH AMERICA

NORTH AMERICA

DWG NUMBER

56-Pin Plastic SSOP Type III

–40

°C to +85°C

74ABT16260 DL

BT16260 DL

SOT371-1

56-Pin Plastic TSSOP Type II

–40

°C to +85°C

74ABT16260 DGG

BT16260 DGG

SOT364-1

56-Pin Plastic SSOP Type III

–40

°C to +85°C

74ABTH16260 DL

BH16260 DL

SOT371-1

56-Pin Plastic TSSOP Type II

–40

°C to +85°C

74ABTH16260 DGG

BH16260 DGG

SOT364-1

PIN DESCRIPTION

PIN NUMBER

SYMBOL

FUNCTION

8, 9, 10, 12, 13, 14, 15, 16, 17, 19, 20, 21

An

Data inputs/outputs (A)

23, 24, 26, 31, 33, 34, 36, 37, 38, 40, 41, 42

1Bn

Data inputs/outputs (B1)

6, 5, 3, 54, 52, 51, 49, 48, 47, 45, 44, 43

2Bn

Data inputs/outputs (B2)

1, 29, 56

OEA, OE1B, OE2B

Output enable input (active low)

2, 27, 30, 55

LE1B, LE2B, LEA1B, LEA2B

Latch enable inputs