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DS1305EN

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
DS1305
16 of 22
DC ELECTRICAL CHARACTERISTICS
(Over the operating range, unless otherwise specified.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Leakage I
LI
-100 +500 µA
Output Leakage I
LO
-1 1 µA
I
OL
= 1.5mA
V
CC
= 2.0V 0.4
Logic 0
Output
I
OL
= 4.0mA
V
OL
V
CC
= 5V 0.4
V
I
OH
= -0.4mA
V
CCIF
= 2.0V 1.6
Logic 1
Output
I
OH
= -1.0mA
V
OH
V
CCIF
= 5V 2.4
V
V
CC1
= 2.0V 0.425
V
CC1
Active Supply Current I
CC1A
V
CC1
= 5V 1.28
mA 2, 8
V
CC1
= 2.0V 25.3
V
CC1
Timekeeping Current
(Osc on)
I
CC1T
V
CC1
= 5V 81
A 1, 8, 12
V
CC1
= 2.0V 25
V
CC1
Standby Current
(Osc off)
I
CC1S
V
CC1
= 5V 80
A 6, 8, 12
V
CC2
= 2.0V 0.4
V
CC2
Active Supply Current I
CC2A
V
CC2
= 5V 1.2
mA 2, 9
V
CC2
= 2.0V 0.3
V
CC2
Timekeeping Current
(Osc on)
I
CC2T
V
CC2
= 5V 1
µA 1, 9, 12
V
CC2
= 2.0V 200
V
CC2
Standby Current
(Osc off)
I
CC2S
V
CC2
= 5V 200
nA 6, 9, 12
Battery Timekeeping Current I
BAT
V
BAT
= 3V 400 nA 10, 12
Battery Standby Current I
BATS
V
BAT
= 3V 200 nA 10, 12
V
CC
Trip Point V
CCTP
V
BAT
- 50
V
BAT
+
200
mV
R1 2
R2
4
Trickle Charge Resistors
R3
8
k
Trickle Charge Diode
Voltage Drop
V
TD
0.7 V
CAPACITANCE
(T
A
= +25C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance C
I
10 pF
Output Capacitance C
O
15 pF
DS1305
17 of 22
3-WIRE AC ELECTRICAL CHARACTERISTICS
(Over the operating range, unless otherwise specified.) (Figure 10 and Figure 11)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
V
CC
= 2.0V 200
Data to CLK Setup t
DC
V
CC
= 5V 50
ns 3,4
V
CC
= 2.0V 280
CLK to Data Hold t
CDH
V
CC
= 5V 70
ns 3,4
V
CC
= 2.0V 800
CLK to Data Delay t
CDD
V
CC
= 5V 200
ns 3,4,5
V
CC
= 2.0V 1000
CLK Low Time t
CL
V
CC
= 5V 250
ns 4
V
CC
= 2.0V 1000
CLK High Time t
CH
V
CC
= 5V 250
ns 4
V
CC
= 2.0V 0.6
CLK Frequency t
CLK
V
CC
= 5V DC 2.0
MHz 4
V
CC
= 2.0V 2000
CLK Rise and Fall t
R,
t
F
V
CC
= 5V 500
ns
V
CC
= 2.0V 4
CE to CLK Setup t
CC
V
CC
= 5V 1
s 4
V
CC
= 2.0V 240
CLK to CE Hold t
CCH
V
CC
= 5V 60
ns 4
V
CC
= 2.0V 4
CE Inactive Time t
CWH
V
CC
= 5V 1
s 4
V
CC
= 2.0V 280
CE to Output High-Z t
CDZ
V
CC
= 5V 70
ns 3,4
V
CC
= 2.0V 280
SCLK to Output High-Z t
CCZ
V
CC
= 5V 70
ns 3,4
DS1305
18 of 22
Figure 10. TIMING DIAGRAM: 3-WIRE READ DATA TRANSFER
Figure 11. TIMING DIAGRAM: 3-WIRE WRITE DATA TRANSFER
* I/O IS SDI AND SDO TIED TOGETHER.
* I/O IS SDI AND SDO TIED TOGETHER.
SERMODE = GND
SERMODE = GND
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

DS1305EN

Mfr. #:
Buy DS1305EN
Manufacturer:
Maxim Integrated
Description:
Real Time Clock Serial Alarm RTC 3-Wire
Lifecycle:
New from this manufacturer.
Delivery:
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