HD74LS374 Datasheet, PDF (1/8 Pages) Hitachi Semiconductor – Octal D-type Edge-triggered Flip-Flips(with three-state outputs)

HD74LS374
Octal D-type Edge-triggered Flip-Flops (with three-state outputs)
REJ03D0483–0200
Rev.2.00
Feb.18.2005
The HD74LS374, 8-bit register features totem-pole three-state outputs designed specifically for driving highly-
capacitive or relatively low-impedance loads. The high-impedance third state and increased high-logic-level drive
provide this register with the capability of being connected directly to and driving the bus lines in a bus-organized
system without need for interface or pull-up components. They are particularly attractive for implementing buffer
registers, I/O ports, bidirectional bus drivers, and working registers. The eight flip-flops are edge-triggered D-type flip-
flops. On the positive transition the clock, the Q outputs will be set to the logic states that ware setup at the D inputs.
Features
• Ordering Information
Part Name
Package Type
Package Code Package
(Previous Code) Abbreviation
HD74LS374P
DILP-20 pin
PRDP0020AC-B
(DP-20NEV)
P
HD74LS374FPEL SOP-20 pin (JEITA)
PRSP0020DD-B
(FP-20DAV)
FP
HD74LS374RPEL SOP-20 pin (JEDEC)
PRSP0020DC-A _RP
(FP-20DBV)
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
—
EL (2,000 pcs/reel)
EL (1,000 pcs/reel)
Pin Arrangement
Output
Control
1
1Q 2
1D 3
2D 4
2Q 5
3Q 6
3D 7
4D 8
4Q 9
GND 10
Q
OE
CK D
CK D
OE _Q
Q
OE
CK D
CK D
OE _Q
OE ^Q
CK D
CK D
OE _Q
OE ^Q
CK D
CK D
OE _Q
20 V_CC
19 _8Q
18 _8D
17 _7D
16 _7Q
15 _6Q
14 _6D
13 _5D
12 _5Q
11 Clock
(Top view)
Rev.2.00, Feb.18.2005, page 1 of 7