DS1501_09 Datasheet, PDF (3/22 Pages) Maxim Integrated Products – Y2K-Compliant Watchdog Real-Time Clocks

DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
DC ELECTRICAL CHARACTERISTICS
(V_CC = 0V; T_A = 0°C to +70°C; V_CC = 0V, T_A = -40°C to +85°C.)
PARAMETER
SYMBOL CONDITIONS
Battery Current, BB32 = 0, EOSC = 0
Battery Current, BB32 = 0, EOSC = 1
V_BAUX Current BB32 = 1, SQW Open
I_BAT1
I_BAT2
I_BAUX
(Note 7)
(Note 7)
(Note 7)
MIN TYP MAX UNITS
0.27 1.0
μA
0.01 0.1
μA
2
μA
CRYSTAL SPECIFICATIONS*
PARAMETER
Nominal Frequency
Series Resistance
Load Capacitance
SYMBOL
f_O
ESR
C_L
CONDITIONS
MIN TYP MAX UNITS
32.768
kHz
45
kΩ
6/12.5
pF
*The crystal, traces, and crystal input pins should be isolated from RF generating signals. Refer to Application Note 58: Crystal Considerations
for Dallas Real-Time Clocks for additional specifications.
AC OPERATING CHARACTERISTICS
(V_CC = 5V ±10%, T_A = 0°C to +70°C; V_CC = 5V ±10%, T_A = -40°C to +85°C.)
PARAMETER
SYMBOL
CONDITIONS
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
t_RC
t_AA
t_CEL
t_CEA
t_CEZ
t_OEL
t_OEL
t_OEA
t_OEZ
t_OH
t_WC
t_AS
t_WEW
t_CEW
t_DS
t_DH
t_AH
t_WEZ
t_WR
PW_HIGH
PW_LOW
(Note 8)
(Note 8)
(Note 8)
(Note 8)
(Note 8)
(Note 8)
MIN TYP MAX UNITS
70
ns
70
ns
5
ns
70
ns
25
ns
5
ns
2
ns
35
ns
25
ns
5
ns
70
ns
0
ns
50
ns
55
ns
30
ns
5
ns
0
ns
25
ns
15
ns
20
ns
70
ns
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