English
Language : 

SDA9253 Datasheet, PDF (13/25 Pages) Siemens Semiconductor Group – 2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM)
SDA 9253
AC Characteristics (cont’d)
VDD = 5 V ± 10 %; TA = 0 to 70 °C
Parameter
Symbol
Limit Values
min. typ. max.
WT to RE lead time tWRL
30
RE to WT lead time tRWL
50
Output buffer turn- tOFF
0
20
off delay
WT to SCB delay tWTD
0
time
WT to SCB lead
tWTL
15
time
WT pulse width
tWTP
10
OEA to output A
tOAA
25
access time
OEB to output B
tOBA
25
access time
Access time from tCAA
25
SCA
Access time from tCBA
25
SCB
Data input set-up tDS
5
time to SCB
Data input hold time tDH
6
to SCB
Unit Test Condition
ns
tWRL and tRWL are restrictive
operating parameters only
in memory write transfer
cycles. In that case tWRL
applies if the write transfer
from shifter C to latch C
occurs before the rising
edge of RE. Otherwise tRWL
has to be satisfied.
See diagram 4
ns See WT to RE lead time
ns
tOFF (max) defines the time
at which the output
achieves the open-circuit
condition and is not
referenced to output
voltages levels.
ns See diagram 4
ns See diagram 4
ns See diagram 4
ns See diagram 2, 5
ns See diagram 3, 5
ns See diagram 2
ns See diagram 3
ns See diagram 5
ns See diagram 5
Semiconductor Group
13
1998-01-30