Datasheet
www.ti.com
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
GQL OR ZQL PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
21 3 4 65
K
GRD OR ZRD PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
21 3 4 65
SN54LVT16244B , , SN74LVT16244B
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS716E – MARCH 2000 – REVISED DECEMBER 2006
The 'LVT16244B devices are 16-bit buffers and line drivers designed for low-voltage (3.3-V) V
CC
operation, but
with the capability to provide a TTL interface to a 5-V system environment. These devices can be used as four
4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide true outputs and symmetrical
active-low output-enable ( OE) inputs.
When V
CC
is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.5 V, OE should be tied to V
CC
through a pullup resistor;
the minimum value of the resistor is determined by the current-sinking capability of the driver.
These devices are fully specified for hot-insertion applications using I
off
and power-up 3-state. The I
off
circuitry
disables the outputs, preventing damaging current backflow through the devices when they are powered down.
The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
TERMINAL ASSIGNMENTS
(1)
(56-Ball GQL/ZQL Package)
1 2 3 4 5 6
A 1 OE NC NC NC NC 2 OE
B 1Y2 1Y1 GND GND 1A1 1A2
C 1Y4 1Y3 V
CC
V
CC
1A3 1A4
D 2Y2 2Y1 GND GND 2A1 2A2
E 2Y4 2Y3 2A3 2A4
F 3Y1 3Y2 3A2 3A1
G 3Y3 3Y4 GND GND 3A4 3A3
H 4Y1 4Y2 V
CC
V
CC
4A2 4A1
J 4Y3 4Y4 GND GND 4A4 4A3
xxxxxx
xxxxxx
K 4 OE NC NC NC NC 3 OE
xxxxxx
xxxxxx (1) NC – No internal connection
TERMINAL ASSIGNMENTS
(1)
(54-Ball GRD/ZRD Package)
1 2 3 4 5 6
A 1Y1 NC 1 OE 2 OE NC 1A1
B 1Y3 1Y2 NC NC 1A2 1A3
C 2Y1 1Y4 V
CC
V
CC
1A4 2A1
D 2Y3 2Y2 GND GND 2A2 2A3
E 3Y1 2Y4 GND GND 2A4 3A1
F 3Y3 3Y2 GND GND 3A2 3A3
G 4Y1 3Y4 V
CC
V
CC
3A4 4A1
H 4Y3 4Y2 NC NC 4A2 4A3
J 4Y4 NC 4 OE 3 OE NC 4A4
(1) NC – No internal connection
2
Submit Documentation Feedback