MA2901 Datasheet, PDF (9/13 Pages) Zarlink Semiconductor Inc – RADIATION HARD 4-BIT MICROPROCESSOR SLICE

MA2901
AC ELECTRICAL CHARACTERISTICS
Read-Modify-Write Cycle (from selection of A,B registers to end of a cycle 40ns
Maximum Clock Frequency to shift Q(50% duty cycle, I = 432 or 632)
25MHz
Minimum Clock LOW time
20ns
Minimum Clock HIGH time
20ns
Minimum Clock Period
40ns
Note: 1. These timings are applied during functional tests and are not routinely measured.
Figure 12: Cycle Time and Clock Characteristics
From Input
A,B Address
D
C_n
I_0,1,2
I_3,4,5
I_6,7,8
A Bypass ALU(I=2xx)
Clock
Note: All timings in ns
To Output
Y
F₃
C_n + 4 G,P
F=0
OVR RAM 0
Q0
RAM ₃
Q₃
65
55
60
55
70
65
65
-
55
40
50
50
65
55
55
-
60
40
35
-
55
35
50
-
70
50
55
55
70
55
65
-
60
45
50
45
65
50
65
-
45
-
-
-
-
-
30
30
45
-
-
-
-
-
-
-
55
50
55
50
50
55
55
35
Figure 13: Combinational Propagation Delays
Input
CP:
Set-up Time
Hold Time
Before H → L
After H → L
A,B Source Address
25
5
B Destination Address
25
No change
D
-
-
C_n
-
I_0,1,2
-
I_3,4,5
-
I_6,7,8
10
RAM_0,3, Q_0,3
-
MIL-STD-883, method 5005, subgroups 9, 10, 11
-
-
-
No change
-
Note: 1. VDD = 5V ±10%, over full operational temperature range
2. CL = 50 pF
Set-up Time
Before L → H
30
No change
40
40
45
45
No change
15
Figure 14: Set-up and Hold Times Relative to Clock (CP) Input
Hold Time
After L → H
-
5
0
0
0
0
10
10
8