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HD74HC91 PDF даташит

Спецификация HD74HC91 изготовлена ​​​​«Hitachi Semiconductor» и имеет функцию, называемую «8-bit Shift Register».

Детали детали

Номер произв HD74HC91
Описание 8-bit Shift Register
Производители Hitachi Semiconductor
логотип Hitachi Semiconductor логотип 

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HD74HC91 Даташит, Описание, Даташиты
HD74HC91
8-bit Shift Register
Description
This serial-in, serial-out, 8-bit shift register is composed of eight R-S master-slave flip-flops, input gating,
and a clock drive. Single-rail data and input control are gated through inputs A and B and an internal
inverter to form the complementary inputs to the first bit of the shift register. Drive for the internal
common clock line is provided by an inverting clock driver. This clock pulse inverter/driver causes these
circuits to shift information one bit on the positive edge of an input clock pulse.
Features
High Speed Operation: tpd (Data Word Input to Output) = 21 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 (Ta = 25°C)
Function Table
Inputs
tn
AB
HH
LX
XL
X : Irrelevant
tn : Reference bit time, clock low
tn + 8: Bit time after 8 low-to-high clock transitions
Outputs
tn + 8
QH
H
L
L
QH
L
H
H









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HD74HC91 Даташит, Описание, Даташиты
HD74HC91
Pin Arrangement
NC 1
NC 2
NC 3
NC 4
Vcc 5
NC 6
NC 7
QH QH
A
B
CK
(Top View)
14 QH
13 QH
12 A
11 B
Inputs
10 GND
9 Clock
8 NC
2









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HD74HC91 Даташит, Описание, Даташиты
HD74HC91
DC Characteristics
Item
Input voltage
Output voltage
Input current
Quiescent supply
current
Ta = 25°C
Ta = –40 to
+85°C
Symbol
VIH
VCC (V) Min Typ Max Min
2.0 1.5 — — 1.5
4.5 3.15 — — 3.15
Max
Unit
V
6.0 4.2 — — 4.2 —
VIL 2.0 — — 0.5 — 0.5 V
4.5 — — 1.35 — 1.35
6.0 — — 1.8 — 1.8
VOH 2.0 1.9 2.0 — 1.9 — V
4.5 4.4 4.5 — 4.4 —
6.0 5.9 6.0 — 5.9 —
4.5 4.18 — — 4.13 —
6.0 5.68 — — 5.63 —
VOL 2.0 — 0.0 0.1 — 0.1 V
4.5 — 0.0 0.1 — 0.1
6.0 — 0.0 0.1 — 0.1
4.5 — — 0.26 — 0.33
6.0 — — 0.26 — 0.33
Iin 6.0 — — ±0.1 — ±1.0 µA
ICC 6.0 — — 4.0 — 40 µA
Test Conditions
Vin = VIH or VIL IOH = –20 µA
IOH = –4 mA
IOH = –5.2 mA
Vin = VIH or VIL IOL = 20 µA
IOL = 4 mA
IOL = 5.2 mA
Vin = VCC or GND
Vin = VCC or GND, Iout = 0 µA
3










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