MO SEL VITELIC
MSU2051/U2031
Operating Conditions
Symbol
Description
Min.
0
Typ.
25
Max.
70
Unit
°C
Remarks
t
A
Ambient temperature under bias
Supply voltage
V CC3
V CC5
f osc 16
f osc 25
f osc 40
2.7
4.5
3.0
16
3.0
5.0
16
4.5
5.5
16
V
U20x1L
V
U20x1S, U20x1C
U20x1i16
Oscillator Frequency
MHz
MHz
MHz
25
25
U20x1i25
25
40
40
U20x1i40
AC Characteristics
(16/25/40 MHz, operating conditions; CL for Port 0, ALE and PSEN Outputs=150pF; CL for all OtherOutputs=80pF)
f osc 16
Valid
Cycle
RD/WRT
RD/WRT
RD/WRT
RD
Variable f osc
Parameter
Min. Typ. Max
Min.
Typ.
Max.
Unit Remarks
Symbol
T LHLL
T AVLL
T LLAX
T LLIV
ALE pulse width
115
43
nS
nS
nS
2xT - 10
T - 20
Address Valid to ALE low
Address Hold after ALE low
ALE low to Valid Instruction In
ALE low to #PSEN low
#PSEN pulse width
53
T - 10
240
4xT - 10 nS
RD
53
nS
T LLPL
T PLPH
T PLIV
T - 10
RD
173
177
0
nS
3xT - 10 nS
nS
3xT - 15
#PSEN low to Valid Instruction In
Instruction Hold after #PSEN
Instruction Float after #PSEN
Address to Valid Instruction In
#PSEN low to Address Float
#RD pulse width
RD
T PXIX
RD
0
RD
87
T + 25 nS
5xT - 20 nS
10 nS
nS
T PXIZ
RD
292
10
T AVIV
T PLAZ
T RLRH
T WLWH
T RLDV
T RHDX
T RHDZ
T LLDV
T AVDV
T LLYL
T AVYL
T QVWH
T QVWX
T WHQX
T RLAZ
T YHLH
T CHCL
T CLCX
T CLCH
T CHCX
T, T CLCL
RD
RD
365
365
302
0
6xT - 10
6xT - 10
#WR pulse width
WRT
RD
nS
#RD low to Valid Data in
Data Hold after #RD
5xT - 10 nS
nS
RD
0
Data Float after #RD
RD
145
490
542
2xT + 20 nS
8xT - 10 nS
9xT - 20 nS
3xT + 10 nS
nS
ALE low to Valid Data In
Address to Valid Data In
ALE low to #WR or #RD low
RD
RD
RD/WRT
178
230
403
38
197
3xT - 10
4xT - 20
7xT - 35
T - 25
Address Valid to #WR or #RD low RD/WRT
Data Valid to #WR High
Data Valid to #WR transition
Data hold after #WR
#RD low to Address Float
#WR or #RD high to ALE high
Clock fall time
WRT
WRT
WRT
RD
nS
nS
73
nS
T + 10
5
nS
RD/WRT
53
72
T + 10 nS
T - 10
nS
nS
nS
nS
nS
Clock low time
Clock rise time
Clock high time
Clock period
63
1/ fosc
Rev. 1.0 February 1998
7
MOSEL [ MOSEL VITELIC, CORP ]
