SA3488 Datasheet, PDF (5/20 Pages) Sames – CMOS 256 X 256 DIGITAL SWITCHING MATRIX

SA3488
A.C. ELECTRICAL CHARACTERISTICS (T = 0 to 70°C, V = 5V ±5%)
amb
CC
All A.C. characteristics are valid 250µs after V_CC and clock have been applied. C_L is the max.
capacitive load and R_L the test pull up resistor.
Signal
CK
(clock)
SYNC
PCM input
Busses
PCM
Output
Busses
Symbol
t_CK
t_WL
t
WH
t_R
t_F
t_SL
t
HL
t_SH
t_WH
t_S
t_H
t_PDmin
t_PDmax
Parameter
Test Condition
Clock Period
Clock Low Level Width
Clock High Level Width
Rise Time
Fall Time
Low Level Setup Time
Low Level Hold Time
High Level Setup Time
High Level Width
Setup Time
Hold Time
Propagation time
CL = 50pf,R_L=2K
referred to CK low level
Propagation time
CL = 50pf,R_L=2K
referred to CK high level
Min.
230
100
100
80
40
80
t_CK
-5
45
45
Typ. Max. Unit
ns
ns
ns
25 ns
25 ns
ns
ns
ns
ns
ns
ns
ns
200 ns
RESET
WR
RD
t_SL Low Level Setup Time
100
t_HL Low Level Hold Time
50
t_SH High Level Setup Time
90
t_WH High Level Width
t_CK
t_WL Low Level Width
150
t_WH High Level Width
t_CK
t_REP Repetition Interval
t_REP = 40+2 t_{CK +}
see
between Active Pulses + t_{WL(CK) +}
formula
t_SH
High Level Setup Time + t_R(CK)
0
to Active Read Strobe
t_HH High Level Hold Time
20
from Active Read Strobe
t_R Rise Time
t_F
Fall Time
t_WL Low Level Width
180
t_WH High Level Width
t_CK
t_REP Repetition Interval
t_REP = 40+2 t_CK
see
between Active Pulses + t + t
WL
R
formula
t_SH High Level Setup Time
0
to Active Read Strobe
t
High Level Hold Time
20
HH
from Active Write Strobe
ns
ns
ns
ns
ns
ns
ns
ns
60 ns
60 ns
ns
ns
ns
ns
t_R Rise Time
t_F
Fall Time
60 ns
60 ns
sames
5