SDA9253 Datasheet, PDF (12/25 Pages) Siemens Semiconductor Group – 2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM)

SDA 9253
AC Characteristics
V_DD = 5 V ± 10 %; T_A = 0 to 70 °C
Parameter
Symbol
Limit Values
Unit
min. typ. max.
Memory read or
t_RC
240
write cycle time
100000 ns
RE low time
t_RE
100
Serial port cycle
t_SC
30
time
RE precharge time t_RP
100
Address setup time t_AS
5
Address hold time t_AH
6
SCAD to RE
set-up time
t_ROS
3
RE to SCAD
hold time
t_ROH
10
RE to RA or RB
t_RRD
90
delay time
RA or RB to RE
t_RRL
lead time
RA to SCA
t_RSS
RB to SCB
set-up time
RA or RB
t_RPW
pulse width
RA to SCA
t_RSH
RB to SCB
hold time
– 30
0
10
15
100000 ns
100000 ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Test Condition
Operation with t_RC ≥ t_RCmin
ensures that 8-bit serial
data are shifted out within
one RE cycle taking
t_SC = t . _SCmin
See diagram 2, 3, 4, 6
See diagram 2, 3, 4, 6
See diagram 2 – 6
See diagram 2, 3, 4, 6
See diagram 2, 3, 4, 6
See diagram 2, 3, 4, 6
See diagram 2, 3, 4, 6
See diagram 2, 3, 4, 6
t_RRD and t_RRL are restrictive
operating parameters only
in memory read transfer
cycles.
See diagram 2, 3
See RE to RA or RB delay
time.
See diagram 2, 3
See diagram 2, 3
See diagram 2, 3
See diagram 2, 3
Semiconductor Group
12
1998-01-30