DS3234 데이터 시트보기 (PDF) - Maxim Integrated
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DS3234 Datasheet PDF : 21 Pages
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DS3234
Extremely Accurate SPI Bus RTC
with Integrated Crystal and SRAM
Electrical Characteristics
(VCC = 2.0V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
SCLK Clock Frequency
Data to SCLK Setup
SCLK to Data Hold
SCLK to CS Setup
SCLK to Data Valid (Note 7)
SCLK Low Time
SCLK High Time
SCLK Rise and Fall
CS to SCLK Setup
SCLK to CS Hold
CS Inactive Time
CS to Output High Impedance
Pushbutton Debounce
fSCL
tDC
tCDH
tCCS
tCDD
tCL
tCH
tR, tF
tCC
tCCH
tCWH
tCDZ
PBDB
2.7V ≤ VCC ≤ 5.5V
2.0V ≤ VCC < 2.7V
2.7V ≤ VCC ≤ 5.5V
2.0V ≤ VCC < 2.7V
2.7V ≤ VCC ≤ 5.5V
2.0V ≤ VCC < 2.7V
2.7V ≤ VCC ≤ 5.5V
2.0V ≤ VCC < 2.7V
2.7V ≤ VCC ≤ 5.5V
2.0V ≤ VCC < 2.7V
(Note 8)
Reset Active Time
Oscillator Stop Flag (OSF) Delay
Temperature Conversion Time
tRST
tOSF
tCONV
(Note 9)
Power-Switch Characteristics
5(TA = -40°C to +85°C)
PARAMETER
SYMBOL
VCC Fall Time; VPF(MAX) to
VPF(MIN)
tVCCF
VCC Rise Time; VPF(MIN) to
VPF(MAX)
Recovery at Power-Up
tVCCR
tREC
(Note 10)
CONDITIONS
Capacitance
(TA = +25°C)
PARAMETER
Capacitance on All Input Pins
Capacitance on All Output Pins
SYMBOL
CIN
CIO
CONDITIONS
(Note 11)
Outputs high impedance (Note 11)
MIN TYP MAX UNITS
4
MHz
2
30
ns
30
ns
30
ns
80
ns
160
110
ns
220
110
ns
220
200
ns
400
ns
100
ns
200
400
ns
40
ns
250
ms
250
ms
100
ms
125
200
ms
MIN TYP MAX UNITS
300
µs
0
µs
125 300
ms
MIN TYP MAX UNITS
10
pF
10
pF
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