Datasheet

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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
OE
To Seven Other Channels
1
11
3
2
CLK
1D
C1
1D
1Q
SN54LVC374A, SN74LVC374A
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS296N – JANUARY 1993 – REVISED MAY 2005
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.
ORDERING INFORMATION
T
A
PACKAGE
(1)
ORDERABLE PART NUMBER TOP-SIDE MARKING
PDIP – N Tube of 20 SN74LVC374AN SN74LVC374AN
QFN – RGY Reel of 1000 SN74LVC374ARGYR LC374A
Tube of 25 SN74LVC374ADW
SOIC – DW LVC374A
Reel of 2000 SN74LVC374ADWR
SOP – NS Reel of 2000 SN74LVC374ANSR LVC374A
–40°C to 85°C
SSOP – DB Reel of 2000 SN74LVC374ADBR LC374A
Tube of 70 SN74LVC374APW
TSSOP – PW Reel of 2000 SN74LVC374APWR LC374A
Reel of 250 SN74LVC374APWT
TVSOP – DGV Reel of 2000 SN74LVC374ADGVR LC374A
CDIP – J Tube of 20 SNJ54LVC374AJ SNJ54LVC374AJ
–55°C to 125°C CFP – W Tube of 85 SNJ54LVC374AW SNJ54LVC374AW
LCCC – FK Tube of 55 SNJ54LVC374AFK SNJ54LVC374AFK
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE (EACH FLIP-FLOP)
INPUTS
OUTPUT
Q
OE CLK D
L ↑ H H
L ↑ L L
L H or L X Q
0
H X X Z
LOGIC DIAGRAM (POSITIVE LOGIC)
2