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DS1501WEN+ Datasheet(PDF) 6 Page - Maxim Integrated Products

Part # DS1501WEN+
Description  Y2K-Compliant Watchdog Real-Time Clocks
Download  21 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS1501WEN+ Datasheet(HTML) 6 Page - Maxim Integrated Products

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DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
6 of 21
Figure 4. Burst Mode Timing Waveform
A 0–A 4
DQ0 – DQ7
O E , W E , OR C E
13h
PW HIGH
PW LOW
POWER-UP/DOWN CHARACTERISTICS
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CE or WE at VIH Before Power-Fail
tPF
0
µs
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
VPF to RST High
tREC
35
200
ms
(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
OUTPUT LOAD
INPUT PULSE
LEVELS
TIMING MEASUREMENT
REFERENCE LEVELS
INPUT PULSE RISE
AND FALL TIMES
(Y) 50pF + 1TTL Gate
Input: 1.5V
(W) 25pF + 1 TTL Gate
0V to 3.0V for 5V
operation
Output: 1.5V
5ns


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