Datasheet

SN74GTLPH32945
32-BIT LVTTL-TO-GTLP BUS TRANSCEIVER
SCES293B OCTOBER 1999 REVISED AUGUST 2001
3–256
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
terminal assignments
123 4 56
A 1A2 1A1 1DIR 1OE 1B1 1B2
B 1A4 1A3 GND GND 1B3 1B4
C 1A6 1A5 1V
CC
1BIAS V
CC
1B5 1B6
D 1A8 1A7 GND GND 1B7 1B8
E 2A2 2A1 GND GND 2B1 2B2
F 2A4 2A3 1V
CC
1V
REF
2B3 2B4
G 2A6 2A5 GND GND 2B5 2B6
H 2A7 2A8 2DIR 2OE 2B8 2B7
J 3A2 3A1 3DIR 3OE 3B1 3B2
K 3A4 3A3 GND GND 3B3 3B4
L 3A6 3A5 2V
CC
2BIAS V
CC
3B5 3B6
M 3A8 3A7 GND GND 3B7 3B8
N 4A2 4A1 GND GND 4B1 4B2
P 4A4 4A3 2V
CC
2V
REF
4B3 4B4
R 4A6 4A5 GND GND 4B5 4B6
T 4A7 4A8 4DIR 4OE 4B8 4B7
ORDERING INFORMATION
T
A
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
–40°C to 85°C LFBGA – GKE Tape and reel SN74GTLPH32945KR GM45
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
functional description
The SN74GTLPH32945 is a medium-drive (50 mA), 32-bit bus transceiver partitioned as four 8-bit segments
and is designed for asynchronous communication between data buses. The device transmits data from the
A port to the B port or from the B port to the A port, depending on the logic level at the direction-control (DIR)
input. OE
can be used to disable the device so the buses are effectively isolated. Data polarity is noninverting.
For A-to-B data flow, when OE
is low and DIR is high, the B outputs take on the logic value of the A inputs. When
OE
is high, the outputs are in the high-impedance state.
The data flow for B to A is similar to that of A to B, except OE
and DIR are low.
FUNCTION TABLE
INPUTS
OE DIR
OUTPUT MODE
H X Z Isolation
L L B data to A port
L H A data to B port
True transparent
PRODUCT PREVIEW
GKE PACKAGE
(TOP VIEW)
123456
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T