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Aeroflex Circuit Technology - Octal D-Type Flip-Flops

Numéro de référence UT54ACTS374
Description Octal D-Type Flip-Flops
Fabricant Aeroflex Circuit Technology 
Logo Aeroflex Circuit Technology 





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UT54ACTS374 fiche technique
Standard Products
UT54ACS374/UT54ACTS374
Octal D-Type Flip-Flops with Three-State Outputs
Datasheet
November 2010
www.aeroflex.com/logic
FEATURES
‰ 8 latches in a single package
‰ Three-state bus-driving true outputs
‰ Full parallel access for loading
‰ 1.2μ CMOS
- Latchup immune
‰ High speed
‰ Low power consumption
‰ Single 5 volt supply
‰ Available QML Q or V processes
‰ Flexible package
- 20-pin DIP
- 20-lead flatpack
‰ UT54ACS374 - SMD 5962-96590
‰ UT54ACTS374 - SMD 5962-96591
DESCRIPTION
The UT54ACS374 and the UT54ACTS374 are non-inverting
octal D type flip-flops with three-state outputs designed for driv-
ing highly capacitive or relatively low-impedance loads. The
device is suitable for buffer registers, I/O ports, and bidirectional
bus drivers.
The eight flip-flops are edge triggered D-type flip-flops. On the
positive transition of the clock the Q outputs will follow the data
(D) inputs.
An output-control input (OC) places the eight outputs in either
a normal logic state (high or low logic level) or a high-impedance
state. The high-impedance third state and increased drive pro-
vide the capability to drive the bus line in a bus-organized system
without the need for interface or pull-up components.
The output control OC does not affect the internal operations of
the flip-flops. Old data can be retained or new data can be en-
tered while the outputs are off.
The devices are characterized over full military temperature
range of -55°C to +125°C.
FUNCTION TABLE
INPUTS
OUTPUT
OC CLK nD nQ
L HH
L LL
L L X nQ0
H X XZ
PINOUTS
20-Pin DIP
Top View
OC 1 20
1Q 2 19
1D 3 18
2D 4 17
2Q 5 16
3Q 6 15
3D 7 14
4D 8 13
4Q 9 12
VSS 10 11
VDD
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
20-Lead Flatpack
Top View
OC
1Q
1D
2D
2Q
3Q
3D
4D
4Q
VSS
LOGIC SYMBOL
(1)
OC
(11)
CLK
EN
C1
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
VDD
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
1D (3)
2D (4)
3D (7)
4D (8)
5D (13)
6D (14)
7D (17)
8D (18)
1D
(2)
(5)
1Q
2Q
(6) 3Q
(9) 4Q
(12) 5Q
(15) 6Q
(16) 7Q
(19) 8Q
Note:
1. Logic symbol in accordance with ANSI/IEEE Std 91-1984 and IEC
Publication 617-12.
1

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