HD74HC590 PDF даташит
Спецификация HD74HC590 изготовлена «Hitachi Semiconductor» и имеет функцию, называемую «8-bit Binary Counter/Register (with 3-state outputs)». |
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Детали детали
Номер произв | HD74HC590 |
Описание | 8-bit Binary Counter/Register (with 3-state outputs) |
Производители | Hitachi Semiconductor |
логотип |
11 Pages
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HD74HC590
8-bit Binary Counter/Register (with 3-state outputs)
Description
This device each contains an 8-bit binary counter that feeds an 8-bit storage register. The storage register
has parallel outputs. Separate clocks are provided for both the binary counter and storage register. The
binary counter features a direct clear input CCLR and a count enable input CCKEN. For cascading a ripple
carry output RCO is provided. Expansion is easily accomplished by tying RCO of the first stage to CCKEN
of the second stage, etc.
Both the counter and register clocks are positive-edge triggered. If the user wishes to connect both clocks
together, the counter state will always be one count ahead of the register, Internal circuitry prevents
clocking from the clock enable.
Features
• High Speed Operation: tpd (RCK to Q) = 18.5 ns typ (CL = 50 pF)
• High Output Current: Fanout of 15 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)
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HD74HC590
Function Table
Inputs
G
H
L
X
X
X
X
X
X
RCK
X
X
X
X
X
X
CCLR
X
X
X
X
L
H
H
H
CCKEN
X
X
X
X
X
L
L
H
CCK
X
X
X
X
X
X
Function
Q output disabled
Q output enabled
Contents of counter stored to register
No change in register
Counter clear
Count up
No count
No count
RCO = QA’•QB’•QC’•QD’•QE’•QF’•QG’•QH’• (CCKEN) (QA’ to QH’: Output of Internal Counter)
Pin Arrangement
QB 1
QC 2
QD 3
QE 4
QF 5
QG 6
QH 7
GND 8
(Top view)
16 VCC
15 QA
14 C
13 RCK
12 CCKEN
11 CCK
10 CCLR
9 RCO
2
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Absolute Maximum Ratings
Item
Supply voltage range
Input voltage
Output voltage
Output current
DC current drain per VCC, GND
DC input diode current
DC output diode current
Power Dissipation per package
Storage temperature
Symbol
VCC
VIN
VOUT
I OUT
ICC, IGND
I IK
I OK
PT
Tstg
HD74HC590
Rating
–0.5 to +7.0
–0.5 to VCC + 0.5
–0.5 to VCC + 0.5
±35
±75
±20
±20
500
–65 to +150
Unit
V
V
V
mA
mA
mA
mA
mW
°C
3
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DataSheet26.com | 2020 | Контакты | Поиск |