DS1501：Y2K-Compliant Watchdog Real-Time Clocks
The DS1501/DS1511 are full-function, year 2000-compliant real-time clock/calendars (RTCs) with an RTC alarm, watchdog timer, power-on reset, battery monitors, 256 bytes NV SRAM, and a 32.768kHz output. User access to all registers within the DS1501/DS1511 is accomplished with a byte-wide interface, as shown in Figure 8. The RTC registers contain century, year, month, date, day, hours, minutes, and seconds data in 24-hour binary-coded decimal (BCD) format. Corrections for day of month and leap year are made automatically.
Key Features
| DS1501, DS1511: Typical Operating Circuit Applications/Uses
|
DataSheet
| title | Download file |
|---|---|
| DS1501-DS1511 Data Sheet | DS1501-DS1511.pdf |
| Errata DS1501 | 1501A6.pdf |
| Errata DS1501 | 1501A7.pdf |
Parametrics
| Part Number | Interface | VSUPPLY (V) | CL (pF) | Memory Type | Memory Size (Bytes) | Time of Day Alarms | Functions | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|
| See Notes | |||||||||
| DS1501 | Bytewide | 3.3 5 | 6 12.5 | NV SRAM | 256 | 1 | RTC Watchdog Timekeeper | PDIP(W)/28 SOIC(W)/28 TSOP/28 | $4.63 @1k |
| DS1511 | - | EDIP/28 | $10.38 @1k | ||||||
Quality and Environmental Data
Ordering Information
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| DS1501W+ | NRND | PDIP(W),;28 pin;592.6 mm² | 0°C to +70°C | Lead Free | |
| DS1501WE | No Longer Available | DS1501WE+ | TSOP,;28 pin;109.8 mm² | 0°C to +70°C | No |
| DS1501WE+ | No Longer Available | TSOP,;28 pin;109.8 mm² | 0°C to +70°C | Lead Free | |
| DS1501WE+T&R | No Longer Available | TSOP,;28 pin;109.8 mm² | 0°C to +70°C | Lead Free | |
| DS1501WE/T&R | No Longer Available | DS1501WE+T&R | TSOP,;28 pin;109.8 mm² | 0°C to +70°C | No |
| DS1501WEN | No Longer Available | DS1501WEN+ | TSOP,;28 pin;109.8 mm² | -40°C to +85°C | No |
| DS1501WEN+ | No Longer Available | TSOP,;28 pin;109.8 mm² | -40°C to +85°C | Lead Free | |
| DS1501WEN+T&R | No Longer Available | TSOP,;28 pin;109.8 mm² | -40°C to +85°C | Lead Free | |
| DS1501WEN/T&R | No Longer Available | DS1501WEN+T&R | TSOP,;28 pin;109.8 mm² | -40°C to +85°C | No |
| DS1501WN+ | NRND | PDIP(W),;28 pin;592.6 mm² | -40°C to +85°C | Lead Free | |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| DS1501WS | No Longer Available | SOIC(W),;28 pin;235 mm² | 0°C to +70°C | No | |
| DS1501WS+ | No Longer Available | DS1501WZ+ | SOIC(W),;28 pin;235 mm² | 0°C to +70°C | See data sheet |
| DS1501WS+T&R | No Longer Available | DS1501WZ+T&R | SOIC(W),;28 pin;235 mm² | 0°C to +70°C | See data sheet |
| DS1501WSN | No Longer Available | SOIC(W),;28 pin;235 mm² | -40°C to +85°C | No | |
| DS1501WSN+ | No Longer Available | DS1501WZN+ | SOIC(W),;28 pin;235 mm² | -40°C to +85°C | See data sheet |
| DS1501WSN+T&R | No Longer Available | DS1501WZN+T&R | SOIC(W),;28 pin;235 mm² | -40°C to +85°C | See data sheet |
| DS1501WSN+T&R-W | No Longer Available | DS1685SN-5+ | SOIC(W),;28 pin;235 mm² | -40°C to +85°C | See data sheet |
| DS1501WSN/T&R | No Longer Available | SOIC(W),;28 pin;235 mm² | -40°C to +85°C | No | |
| DS1501WZ+ | Active | SOIC(W),;28 pin;192.8 mm² | 0°C to +70°C | Lead Free | |
| DS1501WZ+T&R | Active | SOIC(W),;28 pin;192.8 mm² | 0°C to +70°C | Lead Free | |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| DS1501WZN+ | Active | SOIC(W),;28 pin;192.8 mm² | -40°C to +85°C | Lead Free | |
| DS1501WZN+T&R | Active | SOIC(W),;28 pin;192.8 mm² | -40°C to +85°C | Lead Free | |
| DS1501Y+ | NRND | PDIP(W),;28 pin;592.6 mm² | 0°C to +70°C | Lead Free | |
| DS1501YE | No Longer Available | DS1501YE+ | TSOP,;28 pin;109.8 mm² | 0°C to +70°C | No |
| DS1501YE+ | No Longer Available | TSOP,;28 pin;109.8 mm² | 0°C to +70°C | Lead Free | |
| DS1501YE+T&R | Active | TSOP,;28 pin;109.8 mm² | 0°C to +70°C | Lead Free | |
| DS1501YEN | No Longer Available | TSOP,;28 pin;109.8 mm² | -40°C to +85°C | No | |
| DS1501YEN+ | No Longer Available | TSOP,;28 pin;109.8 mm² | -40°C to +85°C | Lead Free | |
| DS1501YEN+T&R | No Longer Available | TSOP,;28 pin;109.8 mm² | -40°C to +85°C | Lead Free | |
| DS1501YN+ | NRND | PDIP(W),;28 pin;592.6 mm² | -40°C to +85°C | Lead Free | |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| DS1501YS | No Longer Available | SOIC(W),;28 pin;235 mm² | 0°C to +70°C | No | |
| DS1501YS+ | No Longer Available | DS1501YZ+ | SOIC(W),;28 pin;235 mm² | 0°C to +70°C | See data sheet |
| DS1501YS+T&R | No Longer Available | SOIC(W),;28 pin;235 mm² | 0°C to +70°C | See data sheet | |
| DS1501YSN | No Longer Available | DS1501YZN+ | SOIC(W),;28 pin;235 mm² | -40°C to +85°C | No |
| DS1501YSN+ | No Longer Available | DS1501YZN+ | SOIC(W),;28 pin;235 mm² | -40°C to +85°C | See data sheet |
| DS1501YSN+T&R | No Longer Available | DS1501YZN+T&R | SOIC(W),;28 pin;235 mm² | -40°C to +85°C | See data sheet |
| DS1501YZ+ | Active | SOIC(W),;28 pin;192.8 mm² | 0°C to +70°C | Lead Free | |
| DS1501YZ+T&R | Active | SOIC(W),;28 pin;192.8 mm² | 0°C to +70°C | Lead Free | |
| DS1501YZN+ | Active | SOIC(W),;28 pin;192.8 mm² | -40°C to +85°C | Lead Free | |
| DS1501YZN+T&R | Active | SOIC(W),;28 pin;192.8 mm² | -40°C to +85°C | Lead Free |
- DS1501-DS1511.pdf DS1511
- 1501A6.pdf DS1511
- 1501A7.pdf DS1511
- Tips for Writing Bulletproof Real-Time Clock Control Code DS3234
- State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks DS3234
- Oscillator Design Considerations for Low-Current Applications DS17885
- Selecting a Backup Source for Real-Time Clocks DS3234
- Using the DS32kHz with Maxim Real-Time Clocks DS17885
- Using the Power-Control Functions of the DS1501/DS1511 Real-Time Clock DS1511
- Lithium Coin-Cell Batteries: Predicting an Application Lifetime DS9034PCX
- Design Considerations for Maxim Real-Time Clocks DS3234
- Crystal Considerations with Maxim Real-Time Clocks (RTCs) DS3234
- DS1501.pdf DS1501
- 1501A7.pdf DS1511
