Philips Semiconductors

Product specification

74ABT899

9-bit dual latch transceiver with 8-bit parity

generator/checker (3-State)

1998 Jan 16

8

AC WAVEFORMS

An, APAR

(Bn, BPAR)

VM

tPLH

tPHL

VM

VM

VM

Bn, BPAR

(An, APAR)

SEL

1

INPUT

OUTPUT

SA00293

Waveform 1. Propagation Delay, An to Bn, Bn to An, APAR to BPAR, BPAR to APAR

An

(Bn)

tPLH

VM

VM

VM

BPAR

(APAR)

LEA

(LEB)

1

INPUT

OUTPUT

ODD/EVEN

0

SEL

0

tPHL

VM

ODD PARITY

EVEN PARITY

ODD PARITY

NOTE: Only even parity mode is shown, odd parity mode would be with ODD/EVEN = 1

SA00294

Waveform 2. Propagation Delay, An to BPAR or Bn to APAR

An

(Bn)

tPHL

VM

VM

VM

ERRA

(ERRB)

LEA

(LEB)

1

INPUT

OUTPUT

APAR

(BPAR)

0

ODD/EVEN

0

tPLH

VM

ODD PARITY

EVEN PARITY

ODD PARITY

NOTE: Only even parity mode is shown, odd parity mode would be with ODD/EVEN = 1

SA00295

Waveform 3. Propagation Delay, An to ERRA or Bn to ERRB