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HD74HC194のメーカーはHitachi Semiconductorです、この部品の機能は「4-bit Bidirectional Universal Shift Register」です。 |
部品番号 | HD74HC194 |
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部品説明 | 4-bit Bidirectional Universal Shift Register | ||
メーカ | Hitachi Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとHD74HC194ダウンロード(pdfファイル)リンクがあります。 Total 8 pages
HD74HC194
4-bit Bidirectional Universal Shift Register
Description
This bidirectional shift register is designed to incorporate virtually all of the features a system designer may
want in a shift register. It features parallel inputs, parallel outputs, right shift and left shift serial inputs,
operating mode control inputs, and a direct overriding clear line. The register has four distinct modes of
operation: parallel (broadside) load, shift right (in the direction QA toware QD); shift left; inhibit clock (do
nothing).
Synchronous parallel loading is accomplished by applying the four bits of data and taking both mode
control inputs, S0 and S1, high. The data are loaded into their respective flip-flops and appear at the outputs
after the positive transition of the clock input. During loading, serial data flow is inhibited. Shift right is
accomplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low. Serial
data for this mode is entered at the shift right data input. When S0 is low and S1 is high, data shifts left
synchronously and new data is entered at the shift left serial input. Clocking of the flip-flops is inhibited
when both mode control inputs are low. The mode control inputs should be changed only when the clock
input is high.
Features
• High Speed Operation: tpd (Clock to Q) = 12 ns typ (CL = 50 pF)
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max
1 Page Pin Arrangement
HD74HC194
Clear
Shift
Right
Serial-Input
1
2
A3
B4
Parallel
Inputs C 5
D6
Shift
Left 7
Serial-Input
GND 8
Timing Diagram
R CLR QA
A QB
B QC
C QD
D CK
L S1
S0
(Top view)
16 VCC
15 QA
14 QB
Parallel
13 QC Outputs
12 QD
11 Clock
10 S1
Mode Control
9 S0
Clock
Mode
Control
Inputs
S0
S1
Clear
Serial
Data
Inputs
R
L
A
Parallel
Data
Inputs
B
C
D
QA
QB
Outputs
QC
QD
H
L
H
L
Clear Load
Shift Right
Shift Left
Inhibit
Clear
3
3Pages HD74HC194
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = –40 to
+85°C
Item
Maximum clock
frequency
Symbol
f max
VCC (V)
2.0
4.5
Min Typ Max Min
——6 —
— — 30 —
Max Unit
5 ns
24
6.0 — — 35 — 28
Propagation delay tPHL
time
2.0 — — 140 — 175 ns
4.5 — 12 28 — 35
6.0 — — 24 — 30
tPLH 2.0 — — 140 — 175 ns
4.5 — 12 28 — 35
6.0 — — 24 — 30
tPHL 2.0 — — 150 — 190 ns
4.5 — 13 30 — 38
6.0 — — 26 — 33
Pulse width tw 2.0 80 — — 100 — ns
4.5 16 6 — 20 —
6.0 14 — — 17 —
Setup time
tsu 2.0 100 — — 125 — ns
4.5 20 7 — 25 —
6.0 17 — — 21 —
2.0 150 — — 187 — ns
4.5 30 17 — 37 —
6.0 25 — — 31 —
Hold time
th 2.0 0 — — 0 — ns
4.5 0 –4 — 0 —
6.0 0 — — 0 —
Removal time
t rem
2.0 25 — — 31 — ns
4.5 5 1 — 6 —
6.0 4 — — 5 —
Output rise/fall
time
t TLH
t THL
2.0 — — 75 — 95 ns
4.5 — 5 15 — 19
6.0 — — 13 — 16
Input capacitance Cin — — 5 10 — 10 pF
Test Conditions
Clock to Q
Clear to Q
Clock or Clear
A, B, C or D to Clock
Mode controls to Clock
Any input
Clear inactive to Clock
6
6 Page | |||
ページ | 合計 : 8 ページ | ||
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PDF ダウンロード | [ HD74HC194 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
HD74HC190 | Synchronous Up/Down Decade/4-bit Binary Counter(Single Clock Line) | Hitachi Semiconductor |
HD74HC191 | Synchronous Up/Down Decade/4-bit Binary Counter(Single Clock Line) | Hitachi Semiconductor |
HD74HC192 | Synchronous Up/Down Decade/4-bit Binary Counter(Dual Clock Line) | Hitachi Semiconductor |
HD74HC193 | Synchronous Up/Down Decade/4-bit Binary Counter(Dual Clock Line) | Hitachi Semiconductor |