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SN54LVTH16373 Datasheet(PDF) 2 Page - Texas Instruments

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Part No. SN54LVTH16373
Description  3.3-V ABT 16-BIT TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54LVTH16373 Datasheet(HTML) 2 Page - Texas Instruments

 
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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
GQL OR ZQL PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
2
1
3 4
6
5
K
SN54LVTH16373
,, SN74LVTH16373
3.3-V ABT 16-BIT TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS144P – MAY 1992 – REVISED NOVEMBER 2006
ORDERING INFORMATION (continued)
TA
PACKAGE(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
Tube
SNJ54LVTH16373WD
–55
°C to 125°C
CFP – WD
SNJ54LVTH16373WD
5962-9681001QXA
These devices can be used as two 8-bit latches or one 16-bit latch. When the latch-enable (LE) input is high, the
Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the levels set up at the
D inputs.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or
low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the
bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines
without interface or pullup components.
OE does not affect internal operations of the latch. Old data can be retained or new data can be entered while
the outputs are in the high-impedance state.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown
resistors with the bus-hold circuitry is not recommended.
When VCC 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 VCC 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 Ioff and power-up 3-state. The Ioff 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
1OE
NC
NC
NC
NC
1CLK
B
1Q2
1Q1
GND
GND
1D1
1D2
C
1Q4
1Q3
VCC
VCC
1D3
1D4
D
1Q6
1Q5
GND
GND
1D5
1D6
E
1Q8
1Q7
1D7
1D8
F
2Q1
2Q2
2D2
2D1
G
2Q3
2Q4
GND
GND
2D4
2D3
H
2Q5
2Q6
VCC
VCC
2D6
2D5
J
2Q7
2Q8
GND
GND
2D8
2D7
K
2OE
NC
NC
NC
NC
2CLK
(1)
NC – No internal connection
2
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