Datasheet

SN74ALB16245
3.3-V ALB 16-BIT TRANSCEIVER
WITH 3-STATE OUTPUTS
SCBS678B – SEPTEMBER 1996 – REVISED JULY 1997
8–9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D Member of the Texas Instruments
Widebus  Family
D State-of-the-Art Advanced Low-Voltage
BiCMOS (ALB) Technology Design for 3.3-V
Operation
D Schottky Diodes on All Inputs to Eliminate
Overshoot and Undershoot
D Industry Standard ’16245 Pinout
D Distributed V
CC
and GND Pin Configuration
Minimizes High-Speed Switching Noise
D Flow-Through Architecture Optimizes PCB
Layout
D Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages
description
The SN74ALB16245 is a 16-bit transceiver
designed for high-speed, low-voltage (3.3-V) V
CC
operation. This device is intended to replace the
conventional transceiver in any speed-critical
path. The small propagation delay is achieved
using a unity gain amplifier on the input and
feedback resistors from input to output, which
allows the output to track the input with a small
offset voltage.
This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows data transmission from the
A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR)
input. The output-enable (OE
) input can be used to disable the device so that the buses are effectively isolated.
The SN74ALB16245 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
(each 8-bit section)
INPUTS
OE DIR
OPERATION
L L B data to A bus
L H A data to B bus
H X Isolation
DGG OR DL PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1DIR
1B1
1B2
GND
1B3
1B4
V
CC
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
V
CC
2B5
2B6
GND
2B7
2B8
2DIR
1OE
1A1
1A2
GND
1A3
1A4
V
CC
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
V
CC
2A5
2A6
GND
2A7
2A8
2OE
Copyright  1997, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Widebus is a trademark of Texas Instruments Incorporated.