HD74HC620_15 Datasheet, PDF (8/14 Pages) Renesas Technology Corp – Octal Bus Transceivers (with inverted 3-state outputs)

HD74HC620, HD74HC623
Switching Characteristics (C_L = 50 pF, Input t_r = t_f = 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
—
Ta = 25°C
Min Typ Max
— — 100
— 12 20
— — 17
— — 150
— 12 30
— — 26
— — 150
— 16 30
— — 26
— — 60
— 4 12
— — 10
— 5 10
Ta = –40 to +85°C
Min
Max Unit
—
125 ns
—
25
—
21
—
190 ns
—
38
—
33
—
190 ns
—
38
—
33
—
75
ns
—
15
—
13
—
10
pF
Test Circuit
HD74HC620
VCC
VCC
Test Conditions
Input
Pulse Generator
Zout = 50 Ω
GBA
GAB
S1
A1
B1
Output
1 kΩ _S2
C_L =
50 pF
OPEN
GND
V_CC
TEST
t_PLH / t _PHL
t_ZH/ t _HZ
t_ZL / t _LZ
S2
OPEN
GND
V_CC
Notes : 1. C_L includes probe and jig capacitance.
2. A2–B2, A3–B3, A4–B4, A5–B5, A6–B6, A7–B7, A8–B8 are identical to above load circuit.
3. S1 is a input / output swich.
Rev.2.00 Mar 30, 2006 page 6 of 11