Rainbow Electronics DS1393 - Manual (Page 5)

DS1390/DS1391/DS1392/DS1393
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
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AC ELECTRICAL CHARACTERISTICS—3-WIRE INTERFACE
(V CC = V CC(MIN) to V CC(MAX) , T A = -40°C to +85°C.) (Note 1) (Figures 3, 4)
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 t CC (Note 13) 400 ns
SCLK to CS Hold t CCH (Note 13) 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 (Note 13, 14) 40 ns
AC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Pushbutton Debounce PB DB 160 200 ms
Reset Active Time t RST 160 200 ms
Oscillator Stop Flag (OSF) Delay t OSF (Note 16) 100 ms