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HD74LS374P Datasheet

Octal D-type Edge-triggered Flip-Flops

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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 VCC
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


Renesas Electronics Components Datasheet

HD74LS374P Datasheet

Octal D-type Edge-triggered Flip-Flops

No Preview Available !

HD74LS374
Function Table
Inputs
Output control
Clock
D
L
H
L
L
L
L
X
H
X
X
Notes: H; high level, L; low level, X; irrelevant
; transition from low to high level
Q0; level of Q before the indicated steady state input conditions were established
Z; off (high-impedance) state of a three state output
Block Diagram
1Q
2Q
3Q
4Q
5Q
6Q
7Q
Outputs
Q
H
L
Q0
Z
8Q
Q
Q
Q
Q
Q
Q
Q
Q
D CK D CK D CK D CK D CK D CK D CK D CK
Output 1D
2D
3D
4D
5D
6D
7D
8D Clock
Control
Absolute Maximum Ratings
Item
Symbol
Ratings
Supply voltage
VCC
7
Input voltage
VIN
7
Power dissipation
PT
400
Storage temperature
Tstg
–65 to +150
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item
Symbol
Min
Supply voltage
VCC
4.75
Output voltage
VOH
Output current
IOH
IOL
Operating temperature
Topr
–20
“H” Level
15
Clock pulse width
tw
“L” Level
15
Data setup time
Data hold time
tsu
20
th
0
Typ
Max
5.00
5.25
5.5
–2.6
24
25
75
Unit
V
V
mW
°C
Unit
V
V
mA
mA
°C
ns
ns
ns
ns
Rev.2.00, Feb.18.2005, page 2 of 7


Part Number HD74LS374P
Description Octal D-type Edge-triggered Flip-Flops
Maker Renesas
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HD74LS374P Datasheet PDF






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