參數(shù)資料
型號(hào): DS1672U-33
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi): Timer or RTC
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDSO8
封裝: 3 MM, MICRO, SOP-8
文件頁(yè)數(shù): 12/15頁(yè)
文件大小: 283K
代理商: DS1672U-33
DS1672
6 of 15
POWER-UP/POWER-DOWN CHARACTERISTICS
(TA = -40C to +85C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
VCC Detect to RST (VCC Falling)
tRPD
10
s
VCC Detect to RST (VCC Rising)
tRPU
250
ms
11
VCC Fall Time; VPF(MAX) to VPF(MIN)
tF
300
s
VCC Rise Time; VPF(MIN) to VPF(MAX)
tR
0
s
Note 11: If the
EOSC bit in the control register is set to logic 1, tRPU is equal to 250ms plus the startup time of the crystal oscillator.
Warning: Negative undershoots below –0.3V while the part is in battery-backed mode can cause
loss of data.
Figure 1. Timing Diagram
SCL
START
SDA
STOP
tBUF
REPEATED
START
tHD:STA
tLOW
tHD:STA
tHD:DAT
tSU:DAT
tHIGH
tSU:STA
tF
tSU:STO
Figure 2. Power-Up/Power-Down Timing
OUTPUTS
VCC
VPF(max)
INPUTS
HIGH IMPEDANCE
RST
DON'T CARE
VALID
RECOGNIZED
VALID
tRPD
VPF(min)
tF
tPD
tR
tRPU
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