DS1302 Trickle-Charge Timekeeping Chip
CAPACITANCE
(TA = +25°C)
PARAMETER
Input Capacitance
I/O Capacitance
SYMBOL
CI
MIN
TYP
10
MAX
UNITS
pF
pF
CI/O
15
AC ELECTRICAL CHARACTERISTICS
(TA = 0°C to +70°C or TA = -40°C to +85°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VCC = 2.0V
200
Data to CLK Setup
tDC
tCDH
tCDD
tCL
(Note 6)
ns
VCC = 5V
50
VCC = 2.0V
VCC = 5V
280
70
CLK to Data Hold
CLK to Data Delay
CLK Low Time
(Note 6)
ns
ns
VCC = 2.0V
VCC = 5V
800
200
(Notes 6, 7, 8)
(Note 6)
VCC = 2.0V
VCC = 5V
1000
250
ns
VCC = 2.0V
VCC = 5V
1000
250
CLK High Time
tCH
(Note 6)
ns
VCC = 2.0V
VCC = 5V
0.5
2.0
CLK Frequency
tCLK
tR, tF
tCC
(Note 6)
MHz
ns
DC
VCC = 2.0V
VCC = 5V
2000
500
CLK Rise and Fall
CE to CLK Setup
CLK to CE Hold
VCC = 2.0V
VCC = 5V
4
1
(Note 6)
(Note 6)
(Note 6)
(Note 6)
µs
VCC = 2.0V
VCC = 5V
240
60
4
tCCH
tCWH
tCDZ
ns
VCC = 2.0V
VCC = 5V
CE Inactive Time
CE to I/O High Impedance
µs
1
VCC = 2.0V
280
70
280
70
ns
V
CC = 5V
VCC = 2.0V
VCC = 5V
SCLK to I/O High Impedance
tCCZ
(Note 6)
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:
Limits at -40°C are guaranteed by design and are not production tested.
All voltages are referenced to ground.
I
CC1T and ICC2T are specified with I/O open, CE and SCLK set to a logic 0.
I
CC1A and ICC2A are specified with the I/O pin open, CE high, SCLK = 2MHz at VCC = 5V; SCLK = 500kHz, VCC = 2.0V.
CE, SCLK, and I/O all have 40kΩ pulldown resistors to ground.
Measured at VIH = 2.0V or VIL = 0.8V and 10ns maximum rise and fall time.
Measured at VOH = 2.4V or VOL = 0.4V.
Load capacitance = 50pF.
I
V
CC1S and ICC2S are specified with CE, I/O, and SCLK open.
CC = VCC2, when VCC2 > VCC1 + 0.2V; VCC = VCC1, when VCC1 > VCC2
VCC2 = 0V.
CC1 = 0V.
Typical values are at +25°C.
.
V
Note 13:
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DALLAS [ DALLAS SEMICONDUCTOR ]
