SDA9251-2X Datasheet, PDF (14/23 Pages) Siemens Semiconductor Group – 868352-Bit Dynamic Sequential Access Memory for Television Applications (TV-SAM)

SDA 9251-2X
AC Characteristics (cont’d)
V_CC = 5 V ± 10 %; T_A = 0 to 70 °C
Parameter
Symbol
Limit Values
min. typ. max.
Refresh period
t_REF
8
Transition time
t_T
2
10
(rise/fall)
L-serial clock time t_SCL
10
H-serial clock time t_SCH
10
Hold time from SCA t_CAH
6
Hold time from SCB t_CBH
6
Input capacitance C_{I 1}
7
(SCA, SCB)
Input capacitance C_{I 2}
5
(all other pins)
Output capacitance C_Q
7
(SQA 0-3, SQB 0-3)
Unit
ms
ns
ns
ns
ns
ns
pF
pF
pF
Test Condition
Either 256 refresh cycles
or read/write cycles on 212
consecutive row
addresses have to be
performed within the 8 ms
interval to maintain data
Transition times are
measured between V_IH
and V_IL.
See diagram 1
See diagram 2
See diagram 2
See diagram 2
See diagram 3
f = 1 MHz
f = 1 MHz
f = 1 MHz
Semiconductor Group
172