sae81c80a Infineon Technologies Corporation, sae81c80a Datasheet - Page 21

• Manufacturer Part Number: sae81c80a
• Description: Cmos Dual-port Ram
• Manufacturer: Infineon Technologies Corporation

AC Characteristics
The AC characteristics apply throughout the operating range
Parameter
Read cycle time
Write cycle time
ALE pulse width
Address setup to ALE low
Address hold after ALE low
RD pulse width
WR pulse width
ALE low to RD or WR active
Data hold after RD high
ALE low to valid data out
RD low to data valid
(only scheduling registers)
Valid data in after WR low
WR low to ALE high
Data setup before WR high
Data hold after WR high
Delay RD low to both chip select active
Delay WR low to both chip select active
Set-up of chip select to RD
Set-up of chip select to WR
*) For deselection
Semiconductor Group
*)
*)
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
CYR
CYW
LHLL
AVLL
LLAX
RLRH
WLWH
LLWL
RHDX
LLDV
RLDV
DVWL
WLLH
QVWH
WHQX
RLCH
WLCH
CLRL
CLWL
21
min.
300 +
440 +
40
30
40
120
120
30
0
–
–
–
150
30
30
–
–
0
0
Limit Values
t
t
LHLL
LHLL
T
A
= 25 C.
max.
–
–
–
–
–
–
–
–
30
290
2
30
–
–
–
20
20
–
–
t
OSC
SAE 81C80 A
+ 20
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns