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DS17285S-3 Datasheet(PDF) 2 Page - Dallas Semiconductor

Part # DS17285S-3
Description  3V/5V Real-Time Clock
Download  38 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS17285S-3 Datasheet(HTML) 2 Page - Dallas Semiconductor

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DS17285/DS17287
2 of 38
ORDERING INFORMATION
PART #
DESCRIPTION
DS17285XX-X RTC Chip
DS17287X-X
RTC Module; 24-pin DIP
PIN DESCRIPTION
X1
- Crystal Input
X2
- Crystal Output
RCLR
- RAM Clear Input
AD0–AD7 - Multiplexed Address/Data Bus
PWR
- Power-On Interrupt Output (Open Drain)
KS
- Kickstart Input
CS
- RTC Chip-Select Input
ALE
- RTC Address Strobe
WR
- RTC Write Data Strobe
RD
- RTC Read Data Strobe
IRQ
- Interrupt Request Output (Open Drain)
SQW
- Square-Wave Output
VCC
- +3V or +5V Main Supply
GND
- Ground
VBAT
- Battery + Supply
VBAUX
- Auxiliary Battery Supply
NC
- No Connect
DESCRIPTION
The DS17285/DS17287 are real-time clocks (RTCs) designed as successors to the industry standard
DS1285, DS1385, DS1485, DS1585, and DS1685 PC real-time clocks. These devices provide the
industry standard DS1285 clock function with either +3V or +5V operation. The DS17285 also
incorporates a number of enhanced features including a silicon serial number, power-on/off control
circuitry, 114 bytes of user NV SRAM plus 2kB of additional NV RAM, and 32.768kHz output for
sustaining power management activities.
3
+3V operating rang
5
+5V operating range
blank commercial temp range
N
industrial
3
+3V operating range
5
+5V operating range
blank commercial temp range
N
industrial temp range
blank 24-pin DIP
E
28- pin TSOP
S
24- pin SO


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