SN54LVC373A_07 Datasheet, PDF (1/24 Pages) Texas Instruments – OCTAL TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS

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SN54LVC373A, SN74LVC373A
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCAS295S – JANUARY 1993 – REVISED MAY 2005
FEATURES
• Operate From 1.65 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Max t_pd of 6.8 ns at 3.3 V
• Typical V_OLP (Output Ground Bounce) < 0.8 V
at V_CC = 3.3 V, T_A = 25°C
• Typical V_OHV (Output V_OH Undershoot) > 2 V at
V_CC = 3.3 V, T_A = 25°C
• Support Mixed-Mode Signal Operation on All
Ports (5-V Input/Output Voltage With
3.3-V V_CC)
• I_off Supports Partial-Power-Down Mode
Operation
• Latch-Up Performance Exceeds 250 mA Per
JESD 17
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
ABC
SN54LVC373A . . . J OR W PACKAGE
SN74LVC373A . . . DB, DGV, DW, N,
NS, OR PW PACKAGE
(TOP VIEW)
SN74LVC373A . . . RGY PACKAGE
(TOP VIEW)
SN54LVC373A . . . FK PACKAGE
(TOP VIEW)
OE 1
1Q 2
1D 3
2D 4
2Q 5
3Q 6
3D 7
4D 8
4Q 9
GND 10
20 V_CC
19 8Q
18 8D
17 7D
16 7Q
15 6Q
14 6D
13 5D
12 5Q
11 LE
1
1Q 2
1D 3
2D 4
2Q 5
3Q 6
3D 7
4D 8
4Q 9
10
20
19 8Q
18 8D
17 7D
16 7Q
15 6Q
14 6D
13 5D
12 5Q
11
3 2 1 20 19
2D ₄
18 8D
2Q 5
17 7D
3Q 6
16 7Q
3D 7
15 6Q
4D 8
14 6D
9 10 11 12 13
DESCRIPTION/ORDERING INFORMATION
The SN54LVC373A octal transparent D-type latch is designed for 2.7-V to 3.6-V V_CC operation, and the
SN74LVC373A octal transparent D-type latch is designed for 1.65-V to 3.6-V V_CC operation.
While 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 logic 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 the high-impedance state. In the high-impedance state, the outputs neither load nor drive the
bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines
without interface or pullup components.
OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered
while the outputs are in the high-impedance state.
These devices are fully specified for partial-power-down applications using I_off. The I_off circuitry disables the
outputs, preventing damaging current backflow through the devices when they are powered down.
To ensure the high-impedance state during power up or power down, 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.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1993–2005, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are
tested unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.