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HD74HC620 Datasheet, PDF (6/12 Pages) Hitachi Semiconductor – Octal Bus Transceivers(with inverted 3-state outputs) | |||
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HD74HC620, HD74HC623
Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Item
Propagation delay
time
Output enable
time
Output disable
time
Output rise/fall
time
Input capacitance
Symbol VCC (V)
tPLH
2.0
tPHL
4.5
6.0
tZH
2.0
tZL
4.5
6.0
tHZ
2.0
tLZ
4.5
6.0
tTLH
2.0
tTHL
4.5
6.0
Cin
â
Ta = 25°C
Min Typ Max
â â 100
â 12 20
â â 17
â â 150
â 12 30
â â 26
â â 150
â 16 30
â â 26
â â 60
â 4 12
â â 10
â 5 10
Ta = â40 to +85°C
Min
Max Unit
â
125 ns
â
25
â
21
â
190 ns
â
38
â
33
â
190 ns
â
38
â
33
â
75
ns
â
15
â
13
â
10
pF
Test Circuit
HD74HC620
VCC
VCC
Test Conditions
Input
Pulse Generator
Zout = 50 â¦
GBA
GAB
S1
A1
B1
Output
1 k⦠S2
CL =
50 pF
OPEN
GND
VCC
TEST
tPLH / t PHL
tZH/ t HZ
tZL / t LZ
S2
OPEN
GND
VCC
Notes : 1. CL includes probe and jig capacitance.
2. A2âB2, A3âB3, A4âB4, A5âB5, A6âB6, A7âB7, A8âB8 are identical to above load circuit.
3. S1 is a input / output swich.
Rev.2.00 Mar 30, 2006 page 6 of 11
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