Rainbow Electronics DS1393 - Manual (Page 3)

DS1390/DS1391/DS1392/DS1393
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
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RECOMMENDED DC OPERATING CONDITIONS (continued)
(V CC = V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at nominal supply voltage and T A = +25°C,
unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
-33 115 175
-3 80 125
V CC Standby Current
(Note 11)
I CCS
-18 60 100
µA
V BACKUP Leakage Current
(V BACKUP = 3.7V,
V CC = V CC(MAX) )
I BACKUPLKG 15 100 nA
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 0V, V
BACKUP
= 3.7V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V BACKUP Current OSC On,
SQW Off
I BACKUP1 (Note 12) 500 1000 nA
V BACKUP Current OSC On,
SQW On (32kHz)
I
BACKUP2
(Note 12) 600 1150 nA
V BACKUP Current OSC On,
SQW On, V BACKUP = 3.0V,
T A = +25°C
I BACKUP3 (Note 12) 600 1000 nA
V BACKUP Current, OSC Off
(Data Retention)
I BACKUPDR (Note 12) 25 100 nA
AC ELECTRICAL CHARACTERISTICS—SPI INTERFACE
(V CC = V CC(MIN) to V CC(MAX) , T A = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
2.7V ≤ V
CC
≤ 5.5V 4
SCLK Frequency (Note 13) f SCLK
1.71V ≤ V
CC
≤ 1.89V 1
MHz
Data to SCLK Setup t DC (Notes 13, 14) 30 ns
SCLK to Data Hold t CDH (Notes 13, 14) 30 ns
2.7V ≤ V
CC
≤ 5.5V 80 SCLK to Data Valid
(Notes 13, 14, 15)
t CDD
1.71V ≤ V
CC
≤ 1.89V 160
ns
2.7V ≤ V
CC
≤. 5.5V 110
SCLK Low Time (Note 13) t CL
1.71V ≤ V
CC
≤ 1.89V 400
ns
2.7V ≤ V
CC
≤ 5.5V 110
SCLK High Time (Note 13) t CH
1.71V ≤ V
CC
≤ 1.89V 400
ns
SCLK Rise and Fall t R , t F 200 ns
CS to SCLK Setup (Note 13) t CC 400 ns
SCLK to CS Hold (Note 13) t CCH 100 ns
2.7V ≤ V
CC
≤. 5.5V 400
CS Inactive Time (Note 13) t CWH
1.71V ≤ V
CC
≤ 1.89V 500
ns
CS to Output High Impedance t CDZ (Notes 13, 14) 40 ns