SDA9254-2 Datasheet, PDF (19/32 Pages) Siemens Semiconductor Group – 2.6 MBit Dynamic Sequential Access Memory for Television Applications (TV-SAM) with On-chip Noise Reduction Filter

SDA 9254-2
AC Characteristics (cont’d)
V_DD = 5 V ± 10 %; T_A = 0 to 70 °C
Parameter
Symbol
Limit Values
min. typ. max.
Refresh period
t_REF
16
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 0-11,
DLO 0 ... 3)
Unit Test Condition
ms Either 256 refresh cycles or
read/write cycles on 212
consecutive row addresses
have to be performed
within the 16 ms interval to
maintain data
ns Transition times are
measured between V_IH and
V_IL.
See diagram 1
ns See diagram 2
ns See diagram 2
ns See diagram 2
ns See diagram 3, 7
pF f = 1 MHz
pF f = 1 MHz
pF f = 1 MHz
Semiconductor Group
19
1998-01-16