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PDF HD74HC597 Data sheet ( Hoja de datos )
| Número de pieza | HD74HC597 | |
| Descripción | 8-bit Latch/Shift Register | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74HC597
8-bit Latch/Shift Register
Description
The HD74HC597 consists of an 8-bit storage latch feeding a parallel-in, serial-out 8-bit shift register. Both
the storage register and shift register have positive-edge triggered clocks. The shift register also has direct
load (from storage) and clear inputs.
Features
• High Speed Operation: tpd (SCK to QH’) = 14 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
RCK
X
X
SCK
X
X
X
X
SLoad
X
L
L
L
SCLR
X
H
H
L
X X HL
X HH
Function
Data loaded to input latches
Data loaded from inputs to shift register
Data transferred from input latches to shift register
Invalid logic, state of shift register indeterminate when signals
removed
Shift register cleared
Shift register clocked Qn = Qn – 1, QA = SER
1 page  
HD74HC597
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
——5 —
— — 27 —
Max Unit Test Conditions
4 MHz
21
6.0 — — 31 — 24
Propagation delay tPLH
time
t PHL
2.0 — — 175 — 220 ns SCK or SLoad or SCLR to QH’
4.5 — 14 35 — 44
6.0 — — 30 — 37
2.0 — — 210 — 265 ns RCK to QH’
4.5 — 17 42 — 53
6.0 — — 36 — 45
Removal time
t rem
2.0 100 — — 125 — ns
4.5 20 — – 25 —
6.0 17 — — 21 —
Setup time
tsu 2.0 100 — — 125 — ns RCK to SCK
4.5 20 — — 25 —
6.0 17 — — 21 —
2.0 100 — — 125 — ns SER to SCK
4.5 20 1 — 25 —
6.0 17 — — 21 —
2.0 100 — — 125 — ns Data to RCK
4.5 20 0 — 25 —
6.0 17 — — 21 —
Hold time
th 2.0 5 — — 5 — ns SCK to SA
4.5 5 — — 5 —
6.0 5 — — 5 —
2.0 5 — — 5 — ns LCK to Data
4.5 5 — — 5 —
6.0 5 — — 5 —
Pulse width tw 2.0 80 — — 100 — ns
4.5 16 7 — 20 —
6.0 14 — — 17 —
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet HD74HC597.PDF ] | |
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