DS1501 Maxim, DS1501 Datasheet - Page 4

• Manufacturer Part Number: DS1501
• Description: The DS1501/DS1511 are full-function, year 2000-compliant real-time clock/calendars (RTCs) with an RTC alarm, watchdog timer, power-on reset, battery monitors, 256 bytes NV SRAM, and a 32
• Manufacturer: Maxim

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