HD74HC180 PDF даташит
Спецификация HD74HC180 изготовлена «Hitachi Semiconductor» и имеет функцию, называемую «8-bit Odd/Even Parity Generator/Checker». |
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Детали детали
Номер произв | HD74HC180 |
Описание | 8-bit Odd/Even Parity Generator/Checker |
Производители | Hitachi Semiconductor |
логотип |
8 Pages
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HD74HC180
8-bit Odd/Even Parity Generator/Checker
Description
This universal, monolithic, 9-bit (8 data bits plus 1 parity bit) parity generator/checker features odd/even
outputs and control inputs to facilitate operation in either odd or even parity applications. Depending on
whether even or odd parity is being generated or checked, the even or odd inputs can be utilized as the
parity of 9th-bit input. The wordlength capability is easily expanded by cascading.
Features
• High Speed Operation:
• 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
∑ of H’s at A Thru H Even
Even
H
Odd H
Even
L
Odd L
XH
XL
Odd
L
L
H
H
H
L
Outputs
∑ Even
H
L
L
H
L
H
∑ Odd
L
H
H
L
L
H
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HD74HC180
Pin Arrangement
G1
Inputs
H2
Inputs
Even
Odd
3
4
Outputs
Σ
Even
Σ
Odd
5
6
GND 7
Logic Diagram
Even
Odd
A
B
C
G
HF
Even
E
Odd
Σ
Even
Σ
Odd
A
D
C
B
(Top view)
14 VCC
13 F
12 E
11 D
10 C
Inputs
9B
8A
D
E
F
G
H
Σ Even
Σ Odd
2
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HD74HC180
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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