sm55161a-80hkcm Austin Semiconductor, Inc., sm55161a-80hkcm Datasheet - Page 27

• Manufacturer Part Number: sm55161a-80hkcm
• Description: 262144 X 16 Bit Vram Multiport Video Ram
• Manufacturer: Austin Semiconductor, Inc.

TIMING REQUIREMENTS OVER RECOMMENDED RANGES OF SUPPLY
VOLTAGE AND OPERATING FREE-AIR TEMPERATURE
Cycle time, read
Cycle time, write
Cycle time, read-modify-write
Cycle time, page-mode read, write
Cycle time, page-mode read-modify-write
Cycle time, transfer read
Cycle time, serial clock
Pulse duration, CASx\ high
Pulse duration, CASx\ low
Pulse duration, RAS\ high
Pulse duration, RAS\ low
Pulse duration, WE\ low
Pulse duration, TRG\ low
Pulse duration, SC high
Pulse duration, SC low
Pulse duration, TRG\ high
Pulse duration, RAS\ low (page mode)
Setup time, column address before CASx\ low
Setup time, DSF before CASx\ low
Setup time, row address before RAS\ low
Setup time, WE\ before RAS\ low
Setup time, DQ before RAS\ low
Setup time, TRG\ high before RAS\ low
Setup time, DSF low before RAS\ low
Setup time, data valid before CASx\ low
Setup time, data valid before WE\ low
Setup time, read command, WE\ high before CASx\ low
Setup time, early-write command, WE\ low before CASx\ low
Setup time, WE\ low before CASx\ high, write
Setup time, WE\ low before RAS\ high, write
Hold time, column address after CASx\ low
Hold time, DSF after CASx\ low
Hold time, row address after RAS\ low
Hold time, TRG\ after RAS\ low
Hold time, write mask after RAS\ low
Hold time, DQ after RAS\ low (write-mask operation)
SMJ55161A
Rev. 1.6 03/05
2
PARAMETER
4
Austin Semiconductor, Inc.
3
SYMBOL
t
t
t
t
t
t
t
t
t
t
t
t
t
c(RDWP)
t
t
su(WMR)
su(WCH)
su(WRH)
t
t
t
su(DQR)
su(DWL)
su(WCL)
t
t
t
t
su(TRG)
h(CLCA)
t
h(RWM)
t
t
su(SFC)
su(SFR)
su(DCL)
t
t
w(TRG)
w(SCH)
t
h(RDQ)
c(TRD)
t
t
t
w(SCL)
w(RL)P
t
h(SFC)
t
h(TRG)
c(rdW)
su(CA)
su(RA)
t
w(WL)
w(GH)
t
w(CH)
w(RH)
t
c(SC)
w(CL)
w(RL)
su(rd)
h(RA)
c(W)
c(rd)
c(P)
27
MIN
124
124
170
130
35
74
20
10
15
50
70
10
17
20
70 100,000 75 100,000 80 100,000
15
17
10
12
10
12
12
12
7
7
0
0
0
0
0
0
0
0
0
0
0
-70
10,000
10,000
MAX
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
MIN
140
140
188
140
48
88
24
10
20
55
75
13
20
20
18
20
13
15
10
15
15
15
9
9
0
0
0
0
0
0
0
0
0
0
0
-75
10,000
10,000
MAX
1
MIN
150
150
200
150
50
90
30
10
20
60
80
15
20
10
10
20
20
20
15
15
10
15
15
15
0
0
0
0
0
0
0
0
0
0
0
-80
10,000
10,000
MAX
Production
SM55161A
UNIT
VRAM
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns