82C55A
Timing Waveforms (Continued)
A0-A1,
CS
A0-A1,
CS
tWA (8)
tRA (2)
tDF (5)
tAW (7)
tAR (1)
tRR (3)
DATA
BUS
RD
tDW (10)
tWD (11)
(4) tRD
DATA
BUS
WR
VALID
HIGH IMPEDANCE
tWW (9)
FIGURE 30. WRITE TIMING
FIGURE 31. READ TIMING
AC Test Circuit
AC Testing Input, Output Waveforms
V1
INPUT
OUTPUT
VIH + 0.4V
VOH
1.5V
1.5V
R1
OUTPUT FROM
DEVICE UNDER
TEST
VIL - 0.4V
VOL
TEST
POINT
AC Testing: All AC Parameters tested as per test circuits. Input RISE and
FALL times are driven at 1ns/V.
R2
C1
(SEE NOTE)
TEST CONDITION DEFINITION TABLE
TEST CONDITION
V1
R1
R2
C1
NOTE: Includes STRAY and JIG Capacitance
1
2
3
1.7V
523Ω
2kΩ
Open
1.7kΩ
Open
150pF
50pF
50pF
V
CC
1.5V
750Ω
Burn-In Circuits
MD82C55A CERDIP
MR82C55A CLCC
F6
F7
F8
1
2
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
F11
F12
F13
3
F9
F4
F3
F14
F2
4
44
43 42 41 40
6
5
4
3
2
1
5
GND
F0
7
39
38
37
36
35
34
33
32
31
30
29
F5
6
F5
8
7
GND
F0
F15
F11
9
F15
8
10
11
12
13
14
15
16
17
F1
F11
F12
F1
F10
F6
9
F12
F13
F14
F15
F11
F12
F10
10
11
12
13
14
15
16
17
18
19
20
F6
F13
F7
F8
F9
F14
F15
F11
F12
F7
F8
F9
F10
F6
V
CC
F10
F6
F13
F14
F15
F11
F12
18 19 20 21 22 23 24 25 26 27 28
C1
F7
F8
C1
F9
F10
NOTES:
NOTES:
1. V
= 5.5V ± 0.5V
1. C1 = 0.01µF minimum
CC
2. VIH = 4.5V ± 10%
3. VIL = -0.2V to 0.4V
4. GND = 0V
2. All resistors are 47kΩ ± 5%
3. f0 = 100kHz ± 10%
4. f1 = f0 ÷ 2; f2 = f1 ÷ 2; . . . ; f15 = f14 ÷ 2
21
HARRIS [ HARRIS CORPORATION ]
