DS1343_1112 Datasheet, PDF (3/20 Pages) Maxim Integrated Products – Low-Current SPI/3-Wire RTCs

Low-Current SPI/3-Wire RTCs
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = VCC(MIN) to +5.5V, VBAT = +1.3V to +5.5V, TA = -40°C to +85°C, unless otherwise noted.) (Notes 2, 3)
PARAMETER
Backup Current
(Note 7)
DS1343
DS1344
Input Leakage (CE, SERMODE,
SCLK, SDI)
SYMBOL
IBAT2
CONDITIONS
VBAT = 3V
VBAT = VBAT(MAX)
VBAT = 3V
VBAT = VBAT(MAX)
II
VIN = 0V to VCC
MIN TYP MAX
300
600
400
700
-0.1
+0.1
Output Leakage
(INT0, INT1, PF, SDO)
IO
CE = VIL, no alarms
-0.1
+0.1
Output Logic 1 (PF, SDO)
Output Logic 0, VOL = 0.4V
(INT0, INT1, PF, SDO)
Power-Fail Trip Point
Switchover Voltage
Trickle-Charger Resistors
IOH
IOL
VPF
VSW
R1
R2
R3
-3 or -33: VOH = 2.4V
VCC R VCC(MIN)
VBAT R 1.3V R VCC + 0.2V (Note 8)
-18
-3
-33
VBAT > VPF
VBAT < VPF
-1
3.0
250
1.51 1.6 1.71
2.45 2.6 2.70
2.70 2.88 3.0
VPF
VBAT > VCC
1
2
4
UNITS
nA
FA
FA
mA
mA
FA
V
V
kI
AC ELECTRICAL CHARACTERISTICS
(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted.) (Notes 2, 3)
PARAMETER
SCLK Frequency
Data to SCLK Setup
SCLK to Data Hold
SCLK to Data Delay
SCLK Low Time
SCLK High Time
SCLK Rise and Fall
CE to SCLK Setup
SCLK to CE Hold
CE Inactive Time
CE to Output High-Z
Oscillator Stop Flag (OSF) Delay
SYMBOL
fSCLK
tDC
tCDH
tCDD
tCL
tCH
tR, tF
tCC
tCCH
tCWH
tCDZ
tOSF
-18
-3 or -33
-18
-3 or -33
-18
-3 or -33
-18
-3 or -33
-18
-3 or -33
(Note 9)
CONDITIONS
MIN TYP MAX UNITS
DC
1
MHz
DC
4
30
ns
30
ns
160
ns
80
400
ns
110
400
ns
110
200
ns
400
ns
100
ns
500
ns
400
40
ns
25
100
ms
3