Datasheet

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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
GQL OR ZQL PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
21 3 4 65
K
abc
GRD OR ZRD PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
21 3 4 65
SN74ALVC164245
16-BIT 2.5-V TO 3.3-V/3.3-V TO 5-V LEVEL-SHIFTING TRANSCEIVER
WITH 3-STATE OUTPUTS
SCAS416P – MARCH 1994 – REVISED NOVEMBER 2005
The logic levels of the direction-control (DIR) input and the output-enable ( OE) input activate either the B-port
outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data
from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the
A-port outputs are activated. The input circuitry on both A and B ports always is active and must have a logic
HIGH or LOW level applied to prevent excess I
CC
and I
CCZ
.
TERMINAL ASSIGNMENTS
(1)
(56-Ball GQL/ZQL Package)
1 2 3 4 5 6
A 1DIR NC NC NC NC 1 OE
B 1B2 1B1 GND GND 1A1 1A2
C 1B4 1B3 V
CCB
V
CCA
1A3 1A4
D 1B6 1B5 GND GND 1A5 1A6
E 1B8 1B7 1A7 1A8
F 2B1 2B2 2A2 2A1
G 2B3 2B4 GND GND 2A4 2A3
H 2B5 2B6 V
CCB
V
CCA
2A6 2A5
J 2B7 2B8 GND GND 2A8 2A7
K 2DIR NC NC NC NC 2 OE
abc (1) NC – No internal connection
TERMINAL ASSIGNMENTS
(1)
(54-Ball GRD/ZRD Package)
1 2 3 4 5 6
A 1B1 NC 1DIR 1 OE NC 1A1
B 1B3 1B2 NC NC 1A2 1A3
C 1B5 1B4 V
CCB
V
CCA
1A4 1A5
D 1B7 1B6 GND GND 1A6 1A7
E 2B1 1B8 GND GND 1A8 2A1
F 2B3 2B2 GND GND 2A2 2A3
G 2B5 2B4 V
CCB
V
CCA
2A4 2A5
H 2B7 2B6 NC NC 2A6 2A7
J 2B8 NC 2DIR 2 OE NC 2A8
(1) NC – No internal connection
xxxxx
xxxxx
xxxxx
xxxxx
FUNCTION TABLE
(1)
(EACH 8-BIT SECTION)
CONTROL INPUTS OUTPUT CIRCUITS
OPERATION
OE DIR A PORT B PORT
L L Enabled Hi-Z B data to A bus
L H Hi-Z Enabled A data to B bus
H X Hi-Z Hi-Z Isolation
(1) Input circuits of the data I/Os always are active.
2