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TMS55166 Datasheet(PDF) 35 Page - Texas Instruments

Part # TMS55166
Description  262144 BY 16-BIT MULTIPORT VIDEO RAM
PDF  70 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS55166 Datasheet(HTML) 35 Page - Texas Instruments

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TMS55165, TMS55166, TMS55175, TMS55176
262144 BY 16-BIT MULTIPORT VIDEO RAM
SMVS463 – DECEMBER 1995
35
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (see Note 7)
PARAMETER
TEST
ALT.
’551xx-60
’551xx-70
UNIT
PARAMETER
CONDITIONS †
SYMBOL
MIN
MAX
MIN
MAX
UNIT
ta(C)
Access time, DQx from CAS low
td(RLCL) = MAX
tCAC
17
20
ns
ta(CA)
Access time, DQx from column address
td(RLCL) = MAX
tAA
30
35
ns
ta(CP)
Access time, DQx from CAS high
td(RLCL) = MAX
tCPA
35
40
ns
ta(G)
Access time, DQx from TRG low
tOEA
15
20
ns
ta(R)
Access time, DQx from RAS low
td(RLCL) = MAX
tRAC
60
70
ns
ta(SE)
Access time, SQx from SE low
CL = 30 pF
tSEA
12
15
ns
ta(SQ)
Access time, SQx from SC high
CL = 30 pF
tSCA
15
20
ns
tdis(CH)
Disable time, random output from CAS high
(see Note 8)
CL = 50 pF
tOFF
3
15
3
20
ns
tdis(G)
Disable time, random output from TRG high
(see Note 8)
CL = 50 pF
tOEZ
3
15
3
20
ns
tdis(RH)
Disable time, random output from RAS high
(see Note 8)
CL = 50 pF
3
15
3
20
ns
tdis(SE)
Disable time, serial output from SE high (see Note 8)
CL = 30 pF
tSEZ
3
10
3
20
ns
tdis(WL)
Disable time, random output from WEx low
(see Note 8)
CL = 30 pF
tWEZ
0
15
0
20
ns
† For conditions shown as MIN / MAX, use the appropriate value specified in the timing requirements.
NOTES:
7. Switching times for RAM-port output are measured with a load equivalent to 1 TTL load and 50 pF. Data out reference level:
VOH / VOL = 2 V/0.8 V. Switching times for SAM-port output are measured with a load equivalent to 1 TTL load and 30 pF. Serial-data
out reference level: VOH / VOL = 2 V/0.8 V.
8. tdis(CH), tdis(RH), tdis(G), tdis( WL ), and tdis(SE) are specified when the output is no longer driven.



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