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DS1501WN+ Datasheet(PDF) 6 Page - Maxim Integrated Products

Part # DS1501WN+
Description  Y2K-Compliant Watchdog Real-Time Clocks
Download  22 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS1501WN+ Datasheet(HTML) 6 Page - Maxim Integrated Products

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DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
6 of 22
Figure 4. Burst Mode Timing Waveform
A 0–A 4
DQ0 – DQ7
O E , W E , OR C E
13h
PW HIG H
PW LOW
POWER-UP/DOWN CHARACTERISTICS
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
tPF
0
μs
CE or WE at V
IH Before Power-Fail
VCC Fall Time: VPF(MAX) to VPF(MIN)
tF
300
μs
VCC Fall Time: VPF(MIN) to VSO
tFB
10
μs
VCC Rise Time: VPF(MIN) to VPF(MAX)
tR
0
μs
tREC
35
200
ms
VPF to RST High
(TA = +25°C)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Expected Data-Retention Time
(Oscillator On)
tDR
(Note 9)
10
Years
CAPACITANCE
(TA = +25°C)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Capacitance on All Input Pins
CIN
10
pF
Capacitance on
IRQ, PWR, RST, and DQ
Pins
CIO
10
pF
AC TEST CONDITIONS
INPUT PULSE
LEVELS
TIMING MEASUREMENT
REFERENCE LEVELS
INPUT PULSE RISE
AND FALL TIMES
OUTPUT LOAD
(Y) 50pF + 1TTL Gate
Input: 1.5V
0V to 3.0V for 5V
operation
Output: 1.5V
5ns
(W) 25pF + 1 TTL Gate


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