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PDF HD74HCT534 Data sheet ( Hoja de datos )
| Número de pieza | HD74HCT534 | |
| Descripción | Octal D-type Flip-Flops(with inverted 3-state outputs) | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
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HD74HCT374/HD74HCT534
Octal D-type Flip-Flops (with 3-state outputs)/
Octal D-type Flip-Flops (with inverted 3-state outputs)
Description
These device are positive edge triggered flip-flops. The difference between HD74HCT374 and
HD74HCT534 is only that the former is a true outputs and the latter is a false outputs. Data at the D inputs,
meeting the setup and hold time requirements, are transferred to the Q outputs on positive going transitions
of the clock (CK) input. When a high logic level is applied to the output control (OC) input, all outputs go
to a high impedance state, regardless of what signals are present at the other inputs and the state of the
storage elements.
Features
• LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility
• High Speed Operation: tpd (Clock to Q) = 15 ns typ (CL = 50 pF)
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: VCC = 4.5 to 5.5 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Output Control Clock
D
LH
LL
LL
X
HX
X
X : Irrelevant
Z : Off (high-impedance) state of a 3-state output.
HD74HCT374
Q
H
L
No change
Z
HD74HCT534
Q
L
H
No change
Z
1 page  
HD74HCT374/HD74HCT534
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = –40 to
+85°C
Test Conditions
Item
Maximum clock
frequency
Symbol Min Typ Max Min Max Unit VCC (V)
fmax — — 30 — 24 MHz 4.5
Propagation delay tPLH
time
t PHL
Output enable
t ZL
time
t ZH
Output disable
t LZ
time
t HZ
Setup time
t su
Hold time
th
Pulse width
tw
Output rise/fall
time
t TLH
t THL
Input capacitance Cin
— 12 28 — 35 ns 4.5
— 15 28 — 35
4.5
— 16 30 — 38 ns 4.5
— 15 30 — 38
4.5
— 13 30 — 38 ns 4.5
— 16 30 — 38
4.5
20 2 — 25 — ns 4.5
5 0 — 6 — ns 4.5
16 5 — 20 — ns 4.5
— 4 12 — 15 ns 4.5
— 5 10 — 10 pF —
Data to clock
Clock to data
Clock, output control
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet HD74HCT534.PDF ] | |
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