DS1302 Datasheet, PDF (11/13 Pages) Dallas Semiconductor – Trickle Charge Timekeeping Chip

CAPACITANCE
(T_A = +25°C)
PARAMETER
Input Capacitance
I/O Capacitance
DS1302 Trickle-Charge Timekeeping Chip
SYMBOL MIN TYP MAX UNITS
C_I
10
pF
C_I/O
15
pF
AC ELECTRICAL CHARACTERISTICS
(T_A = 0°C to +70°C or T_A = -40°C to +85°C.) (Note 1)
PARAMETER
SYMBOL
Data to CLK Setup
CLK to Data Hold
CLK to Data Delay
CLK Low Time
CLK High Time
CLK Frequency
CLK Rise and Fall
CE to CLK Setup
CLK to CE Hold
CE Inactive Time
CE to I/O High Impedance
SCLK to I/O High Impedance
t_DC
t_CDH
t_CDD
t_CL
t_CH
t_CLK
t_R, t_F
t_CC
t_CCH
t_CWH
t_CDZ
t_CCZ
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
V_CC = 2.0V
V_CC = 5V
CONDITIONS
(Note 6)
(Note 6)
(Notes 6, 7, 8)
(Note 6)
(Note 6)
(Note 6)
(Note 6)
(Note 6)
(Note 6)
(Note 6)
(Note 6)
MIN TYP MAX UNITS
200
50
280
70
1000
250
1000
250
DC
4
1
240
60
4
1
800
200
0.5
2.0
2000
500
280
70
280
70
ns
ns
ns
ns
ns
MHz
ns
μs
ns
μs
ns
ns
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Note 10:
Note 11:
Note 12:
Note 13:
Limits at -40°C are guaranteed by design and are not production tested.
All voltages are referenced to ground.
I_CC1T and I_CC2T are specified with I/O open, CE and SCLK set to a logic 0.
I_CC1A and I_CC2A are specified with the I/O pin open, CE high, SCLK = 2MHz at V_CC = 5V; SCLK = 500kHz, V_CC = 2.0V.
CE, SCLK, and I/O all have 40kΩ pulldown resistors to ground.
Measured at V_IH = 2.0V or V_IL = 0.8V and 10ns maximum rise and fall time.
Measured at V_OH = 2.4V or V_OL = 0.4V.
Load capacitance = 50pF.
I_CC1S and I_CC2S are specified with CE, I/O, and SCLK open.
V_CC = V_CC2, when V_CC2 > V_CC1 + 0.2V; V_CC = V_CC1, when V_CC1 > V_CC2.
V_CC2 = 0V.
V_CC1 = 0V.
Typical values are at +25°C.
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