SM55161A Austin Semiconductor, SM55161A Datasheet - Page 26

• Manufacturer Part Number: SM55161A
• Description: 262144 x 16 BIT VRAM MULTIPORT VIDEO RAM
• Manufacturer: Austin Semiconductor

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CAPACITANCE OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE
AND OPERATING FREE-AIR TEMPERATURE*
NOTES: *V
SWITCHING CHARACTERISTICS OVER RECOMMENDED RANGES OF
SUPPLY VOLTAGE AND OPERATING FREE-AIR TEMPERATURE
NOTES:
1. Switching times for RAM-port output are measured with a load equivalent to one TTL load and 50pF. Data-out reference level: V
Switching times for SAM-port output are measured with a load equivalent to one TTL load and 30pF. Serial-data out reference level: V
2V/0.8V.
2. For conditions shown as MIN/MAX, use the appropriate value specified in the timing requirements.
3. t
SMJ55161A
Rev. 1.6 03/05
Input capacitance, address inputs
Input capacitance, address-strobe inputs
Input capacitance, write-enable input
Input capacitance, serial clock
Input capacitance, serial enable
Input capacitance, special function
Input capacitance, transfer-register input
Output capacitance, SQ and DQ
Output capacitance, QSF
Access time from CASx\
Access time from column address
Access time from CASx\ high
Access time from RAS\
Access time of DQ from TRG\ low
Access time of SQ from SC high
Access time of SQ from SE\ low
Disable time, random output from CASx\ high
Disable time, random output from RAS\ high
Disable time, random output from TRG\ high
Disable time, random output from WE\ low
Disable time, serial output from SE\ high
dis(CH)
, t
dis(RH)
CC
, t
= 5V ±0.5V, and the bias on pins under test is 0V.
dis(G)
PARAMETER
PARAMETER
, t
dis(WL)
Austin Semiconductor, Inc.
, and t
dis(SE)
are specified when the output is no longer driven.
3
3
3
SYMBOL
SYMBOL
t
t
t
t
dis(WL)
C
t
t
t
dis(CH)
dis(RH)
t
dis(SE)
t
C
C
t
a(SQ)
dis(G)
t
a(CA)
a(CP)
t
a(SE)
C
C
a(G)
C
C
a(C)
a(R)
C
O(QSF)
C
i(TRG)
i(DSF)
i(RC)
i(SC)
i(SE)
O(O)
i(W)
i(A)
CONDITIONS
26
t
d(RLCL)
C
C
C
C
C
C
C
L
L
L
L
L
L
L
MIN
= 30 pF
= 30 pF
= 50 pF
= 50 pF
= 50 pF
= 50 pF
= 30 pF
= MAX
2
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
TYP
MIN
12
10
5
8
7
6
7
7
7
0
0
0
0
0
-70
MAX
17
35
40
70
17
20
17
17
17
17
17
15
MAX
10
10
10
10
10
10
10
15
12
MIN
0
0
0
0
0
-75
MAX
20
38
43
75
20
23
18
20
20
20
25
18
Production
UNIT
SM55161A
pF
pF
pF
pF
pF
pF
pF
pF
pF
MIN
0
0
0
0
0
1
VRAM
-80
OH
MAX
/V
20
40
45
80
20
25
20
20
20
20
25
20
OL
= 2V/0.8V.
OH
UNIT
/V
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
OL
=