DS1385 Datasheet, PDF (14/20 Pages) Dallas Semiconductor – RAMified Real Time Clock 4K x 8

DS1385/DS1387
4K X 8 AC TIMING CHARACTERISTICS
PARAMETER
SYMBOL MIN
Address Setup Time
Address Hold Time
Data Setup Time
Data Hold Time
Output Enable Access Time
Write Pulse Width
OER Pulse Width
OER to Output in High Z
AS0, AS1 Pulse Width
AS0, AS1 High to OER Low
AS0, AS1 High to WER Low
t_AS
55
t_AH
0
t_DS
75
t_DH
0
t_OEA
t_WP
200
t_RP
200
t_OEZ
t_ASP
75
t_ASO
20
t_ASW
20
(0°C to 70°C; V_CC = 5V + 10%)
TYP
MAX
UNITS NOTES
ns
ns
ns
ns
200
ns
7
ns
ns
50
ns
ns
ns
ns
BUS TIMING FOR READ CYCLE TO 4K X 8 NV SRAM
WER = V_IH
AS0
t_ASP
AS1
OER
t_ASP
t_ASO
t_RP
AD0–AD7
t_AH
t_AS
t_AS
t_AH
LOW ADDRESS VALID
UPPER ADDRESS VALID
t_OEA
t_OEZ
DATA OUT
VALID
012496 14/20