DS1390 Datasheet, PDF (5/24 Pages) Maxim Integrated Products – Low-Voltage SPI/3-Wire RTCs with Trickle Charger

Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
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
SCLK Frequency (Note 13)
Data to SCLK Setup
SCLK to Data Hold
SCLK to Data Valid (Notes 13,
14, 15)
SCLK Low Time (Note 13)
SCLK High Time (Note 13)
SCLK Rise and Fall
CS to SCLK Setup
SCLK to CS Hold
CS Inactive Time (Note 13)
CS to Output High Impedance
SYMBOL
f_SCLK
t_DC
t_CDH
t_CDD
t_CL
t_CH
t_R, t_F
t_CC
t_CCH
t_CWH
t_CDZ
CONDITION
2.7V ≤ V_CC ≤ 5.5V
1.71V ≤ V_CC ≤ 1.89V
(Notes 13, 14)
(Notes 13, 14)
2.7V ≤ V_CC ≤ 5.5V
1.71V ≤ V_CC ≤ 1.89V
2.7V ≤ V_CC ≤ 5.5V
1.71V ≤ V_CC ≤ 1.89V
2.7V ≤ V_CC ≤ 5.5V
1.71V ≤ V_CC ≤ 1.89V
(Note 13)
(Note 13)
2.7V ≤ V_CC ≤ 5.5V
1.71V ≤ V_CC ≤ 1.89V
(Note 13, 14)
MIN TYP MAX UNITS
4
MHz
1
30
ns
30
ns
80
ns
160
110
ns
400
110
ns
400
200
ns
400
ns
100
ns
400
ns
500
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
Pushbutton Debounce
Reset Active Time
Oscillator Stop Flag (OSF) Delay
SYMBOL
PB_DB
t_RST
t_OSF
(Note 16)
CONDITIONS
MIN TYP MAX UNITS
160
200
ms
160
200
ms
100
ms
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