¡ Semiconductor
MSM80C48/49/50, MSM80C35/39/40
AC Characteristics
(VCC=2.5V to 6V (*1), Ta=–40 to +85°C)
V
CC=5 V±±10
Variable clock
1 to ±± MHz
Parameter
Symbol ±± MHz Clock
Min. Max.
Unit
Min.
3.5t–170
2t–110
t–40
Max.
—
tLL
tAL
150
70
—
—
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ALE Pulse Width
—
Address Setup Time (up to ALE)
Address Hold Time (from ALE)
Bus Port Latch Data Setup Time (up to ALE Rising Edge)
Bus Port Latch Data Hold Time (from ALE Rising Edge)
Control Pulse Width (RD, WR)
Control Pulse Width (PSEN)
Data Setup Time (before WR)
Data Hold after Time (after WR)
Data Hold Time (after RD, PSEN)
RD to Data-in
tLA
50
—
—
tBL
110
90
—
2.5t –115
1.5 t–45
7t–155
6t–200
6t–155
2t–140
0
—
tLB
—
—
tCC1
tCC2
tDW
tWD
tDR
480
350
390
40
—
—
—
—
—
—
—
—
0
110
350
190
—
1.5t–30
5t–265
5t–265
—
tRD1
tRD2
tAW
tAD1
tAD2
tAFC1
tAFC2
tLAFC2
tLAFC1
tCA1
tCA2
tCP
—
—
—
—
PSEN to Data-in
300
—
6t–245
—
Address Setup to WR
730
460
—
12t–360
8t–265
—
Address Setup to Data-in
—
—
Address Setup to Instruction
Address Float to RD, WR
140
10
2t–40
10
—
—
Address Float to PSEN
60
—
t–30
—
Control Pulse Setup Time from ALE (PSEN)
Control Pulse Setup Time from ALE (RD, WR)
Control Pulse up to ALE (RD, WR, PROG)
Control Pulse up to ALE (PSEN)
Port Control Setup Time (up to PROG Falling Edge)
Port Control Hold Time (from PROG Falling Edge)
PROG to Input Data Valid
200
50
—
3t–75
1.5t–85
4.5t–90
2t–130
4t–260
—
—
—
—
320
50
—
—
—
—
tPC
100
—
—
—
tPR
650
140
—
9t–170
1.5t
—
tPF
0
0
Input Data Hold Time
tDP
250
40
6t–290
3t–230
10t–210
4.5–250
1.5t–120
—
Output Data Setup Time
tPD
—
—
Output Data Hold Time
tPP
700
160
15
—
—
PROG Pulse Width
tPL
—
—
Port 2 I/O Setup Time
tLP
—
—
Port 2 I/O Hold Time
tPV
—
510
—
4t+145
—
Port Output Data (from ALE)
T0 Cycle
tOPRR
tCY
270
1.36
3t
—
15t
—
Instruction Execution Time
Note : Control output : C =80pF
L
Bus output : C =150pF [for 20 pF (t , t
, t
)]
L
AL AFC1 AFC2
*1 Minimum operating voltage is dependent on frequency.
10/20
OKI [ OKI ELECTRONIC COMPONETS ]
