WS82C55A データシートの表示（PDF） - Wing Shing International Group
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WS82C55A Datasheet PDF : 25 Pages
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Timing Waveforms (Continued)
A0-A1,
CS
DATA
BUS
WR
tAW (7)
tWA (8)
tDW (10) tWD (11)
tWW (9)
FIGURE 30. WRITE TIMING
AC Test Circuit
V1
OUTPUT FROM
DEVICE UNDER
TEST
R1
TEST
POINT
R2
C1
(SEE NOTE)
NOTE: Includes STRAY and JIG Capacitance
Burn-In Circuits
F6
1
F7
2
F8
3
F9
4
F4
5
F3
6
GND
7
F0
8
F1
9
F10
10
F6
11
F7
12
F8
13
F9
14
F10
15
F6
16
F7
17
F8
18
F9
19
F10
20
NOTES:
1. VCC = 5.5V ± 0.5V
2. VIH = 4.5V ± 10%
3. VIL = -0.2V to 0.4V
4. GND = 0V
DIP
40
F11
39
F12
38
F13
37
F14
36
F2
35
F5
34
F15
33
F11
32
F12
31
F13
30
F14
29
F15
28
F11
27
F12
26
VCC
25
F13
C1
24
F14
23
F15
22
F11
21
F12
WS82C55A
A0-A1,
CS
RD
DATA
BUS
tAR (1)
tRR (3)
(4) tRD
VALID
HIGH IMPEDANCE
FIGURE 31. READ TIMING
tRA (2)
tDF (5)
AC Testing Input, Output Waveforms
INPUT
VIH + 0.4V
OUTPUT
VOH
1.5V
1.5V
VIL - 0.4V
VOL
AC Testing: All AC Parameters tested as per test circuits. Input RISE and
FALL times are driven at 1ns/V.
TEST CONDITION DEFINITION TABLE
TEST CONDITION
1
2
3
V1
1.7V
VCC
1.5V
R1
523Ω
2kΩ
750Ω
R2
Open
1.7kΩ
Open
C1
150pF
50pF
50pF
21
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