Datasheet

DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
4 of 22
AC OPERATING CHARACTERISTICS
(DS1511: V
CC
= 3.3V ±10%, T
A
= 0°C to +70°C; DS1501: V
CC
= 3.3V ±10%, T
A
= -40°C to +85°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Read Cycle Time
t
RC
120
ns
Address Access Time
t
AA
120
ns
CE to DQ Low-Z
t
CEL
(Note 8)
5
ns
CE Access Time
t
CEA
120
ns
CE Data Off Time
t
CEZ
(Note 8)
40
ns
OE to DQ Low-Z (0°C to +85°C)
t
OEL
(Note 8)
5
ns
OE to DQ Low-Z (-40°C to 0°C)
t
OEL
(Note 8)
2
ns
OE Access Time
t
OEA
100
ns
OE Data-Off Time
t
OEZ
(Note 8)
35
ns
Output Hold from Address
t
OH
5
ns
Write Cycle Time
t
WC
120
ns
Address Setup Time
t
AS
0
ns
WE Pulse Width
t
WEW
100
ns
CE Pulse Width
t
CEW
110
ns
Data Setup Time
t
DS
80
ns
Data Hold Time
t
DH
5
ns
Address Hold Time
t
AH
5
ns
WE Data-Off Time
t
WEZ
(Note 8)
40
ns
Write Recovery Time
t
WR
15
ns
Pulse Width, OE, WE, or CE High
PW
HIGH
40
ns
Pulse Width, OE, WE, or CE Low
PW
LOW
100
ns
Figure 1. Read Cycle Timing
t
RC
t
CEA
t
OEA
t
CEL
t
OEL
t
OH
t
OEZ
t
AA
VALID
DQ0-DQ7
OE
CE
A0–A4
t
CEZ