DS3234(2006) 데이터 시트보기 (PDF) - Maxim Integrated
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DS3234 Datasheet PDF : 20 Pages
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Extremely Accurate SPI Bus RTC with
Integrated Crystal and SRAM
AC ELECTRICAL CHARACTERISTICS
(VCC = 2.0V to 5.5V, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SCLK Clock Frequency
Data to SCLK Setup
SCLK to Data Hold
SCLK to CS Setup
SCLK to Data Valid (Note 6)
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
Reset Active Time
Oscillator Stop Flag (OSF) Delay
Temperature Conversion Time
SYMBOL
fSCL
tDC
tCDH
tCCS
tCDD
tCL
tCH
tR, tF
tCC
tCCH
tCWH
tCDZ
PBDB
tRST
tOSF
tCONV
CONDITIONS
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 7)
(Note 8)
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
POWER-SWITCH CHARACTERISTICS
(TA = -40°C to +85°C)
PARAMETER
SYMBOL
VCC Fall Time; VPF(MAX) to
VPF(MIN)
VCC Rise Time; VPF(MIN) to
VPF(MAX)
Recovery at Power-Up
tVCCF
tVCCR
tREC
(Note 9)
CONDITIONS
MIN TYP MAX UNITS
300
µs
0
µs
125
300
ms
CAPACITANCE
(TA = +25°C)
PARAMETER
Capacitance on All Input Pins
Capacitance on All Output Pins
SYMBOL
CIN
CIO
CONDITIONS
(Note 10)
Outputs high impedance (Note 10)
MIN TYP MAX UNITS
10
pF
10
pF
4 _____________________________________________________________________
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