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HC374 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 HC374
部品説明 Tri-State Octal D-Type Flip-Flops
メーカ RCL Semiconductors
ロゴ RCL Semiconductors ロゴ 



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HC374 Datasheet, HC374 PDF,ピン配置, 機能
Preliminary Specification
RCL Semiconductors Ltd.
Tri–State Octal D-Type Flip-Flops (Edge Triggered)
HC374
GENERAL DESCRIPTION
HC374 is fabricated in the high-speed silicon
gate CMOS technology. It has the high noise
immunity and low power consumption of standard
CMOS integrated circuits. It also offers speeds
comparable to low power Schottky devices
(LS-TTL).
These 8-bit flip-flops with 3-state outputs are
specifically designed for driving highly capacitive
or relatively low-impedance loads. They are
particularly suitable for implementing buffer
registers, I/O ports, bi-directional bus drivers, and
working registers.
HC374 has octal positive edge triggered
D-type flip-flops. On the positive transition of
the clock (CK) input, data at the inputs D,
meeting the setup and hold time requirement,
are transferred to the Q outputs.
FEATURES
• Wide operating supply voltage range: 2-6V
• Output Drive at VDD = 5V : ±6mA
• Typical propagation delay: 14ns
• Low input current: < 1µA
• Low quiescent supply current: 80µA maximum
• Octal D-type flip-flops in a single package
• Full Parallel access for Loading
An output-enable input (OE) places the
eight outputs in either a normal logic state (H
or L 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 pull-up
components.
OE does not affect the internal operation
of the flip-flops. Old data can be retained or
new data can be entered while the outputs
are in the high-impedance state.
OE should be tied to VDD through a pull-up
resistor to ensure the high-impedance state during
power up or power down,; the minimum value of
the resistor is determined by the current-sinking
capability of the driver.
LOGIC DIAGRAM
D1
3
D1
D2
4
D2
D3
7
D3
D4
8
D4
D5
13
D5
D6
14
D6
D7
17
D7
D8
18
D8
CK 11
C1 C2 C3 C4 C5 C6 C7 C8
1
OE
2
56
9
12 15
16 19
Q1
Q2 Q3
Q4
Q5 Q6
Q7 Q8
3 Dai Fu Street, Tai Po Industrial Estate, Tai Po, N.T. , Hong Kong.
Tel : (852)-26659229 Fax : (852)-26652201
1
070209
Free Datasheet http://www.Datasheet4U.com

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