Siemens SAB 80515 Series, User Manual, Page: 253 / 270

Device Specifications
Semiconductor Group 253
AC Characteristics
V
CC
= 5 V
±
10%;
V
SS
= 0 V (
C
L
for Port 0, ALE and PSEN outputs = 100 pF;
C
L
for all outputs = 80 pF);
T
A
= 0 to 70 °C for SAB 80C515/80C535
T
A
= – 40 to 85 °C for SAB 80C515/80C535-T40/85
Parameter Symbol Limit values Unit
12 MHz clock Variable clock
1/
t
CLCL
= 3.5 MHz to 12 MHz
min. max. min. max.
Program Memory Characteristics
ALE pulse width
t
LHLL
127 – 2
t
C LCL
– 40 – ns
Address setup to ALE
t
AVLL
53 –
t
C LCL
– 30 – ns
Address hold after ALE
t
LLAX
48 –
t
C LCL
– 35 – ns
ALE to valid instruction
in
t
LLIV
– 233 – 4
t
C LCL
– 100 ns
ALE to PSEN
t
LLPL
58 –
t
C LCL
– 25 – ns
PSEN pulse width
t
PLPH
215 3
t
C LCL
– 35 ns
PSEN to valid instruction
in
t
PLIV
– 150 – 3
t
C LCL
– 100 ns
Input instruction hold
after PSEN
t
PXIX
0 – 0
–
ns
Input instruction float
after PSEN
t
PXIZ
1)
– 63
–
t
C LCL –
20 ns
Address valid after
PSEN
t
PXAV
1
)
75
t
C LCL
– 8 ns
Address to valid instruc-
tion in
t
A VIV
– 302
–
5
t
C LCL –
115 ns
Address float to PSEN
t
A ZPL
0 – 0
–
ns
1)
Interfacing the SAB 80C515 to devices with float times up to 75 ns is permissible.
This limited bus contention will not cause any damage to port 0 drivers.
*