사양
| 속성 | 가치 |
| Supplier | Analog Devices Inc./Maxim Integrated |
| Package | Tube |
| ProductStatus | Obsolete |
| MemoryType | Non-Volatile |
| MemoryFormat | NVSRAM |
| Technology | NVSRAM (Non-Volatile SRAM) |
| MemorySize | 1Mb (128K x 8) |
| MemoryInterface | Parallel |
| WriteCycleTime-WordPage | 70ns |
| AccessTime | 70 ns |
| Voltage-Supply | 4.5V ~ 5.5V |
| OperatingTemperature | 0°C ~ 70°C (TA) |
| MountingType | Through Hole |
| Package/Case | 32-DIP Module (0.600, 15.24mm) |
개요
Description
DS1245Y-70+ is a Dallas/Maxim nonvolatile SRAM (NVSRAM) with an integrated real‑time clock (RTC). It stores a RAM array that is powered by VCC and backed up by VBAT, so data survives power loss and timekeeping continues. It is accessed via a parallel 8‑bit data bus with standard control signals (CS, /WE, /OE). The device is suited for data logging, time‑stamping, and fault‑tolerant embedded firmware where persistent memory and RTC are required. The “Y‑70+” variant indicates an industrial-temperature, high‑reliability version with different capacity/trequency options across package types. Benefits: fast random access, no wear from EEPROM-style writes, and self-contained timekeeping. For exact memory size, electrical specs, timing, and pinout, consult the DS1245Y‑70+ datasheet.
Features
DS1245Y-70+ is a battery-backed NVSRAM from Dallas/Maxim. Key features:
- Nonvolatile RAM with automatic power-fail data protection (switchover to backup supply on VCC loss)
- 70+ year data retention in backup mode
- Integrated real-time clock/calendar (RTC) with time stamping
- Trickle-charger backup supply capability for an external coin-cell/Li battery
- Write-protect and robust data-write integrity controls
- Parallel 8-bit interface (standard MCU compatibility) with address and control signals
- Industrial temperature range suitable for harsh applications
- Available in multiple package/form options (e.g., surface-mount and through-hole variants)
Typical uses: data logging, event timing, secure/safe data storage in embedded systems, and applications needing nonvolatile RAM with timekeeping. For exact densities, timings, and package options, consult the specific DS1245Y-70+ datasheet.
- Nonvolatile RAM with automatic power-fail data protection (switchover to backup supply on VCC loss)
- 70+ year data retention in backup mode
- Integrated real-time clock/calendar (RTC) with time stamping
- Trickle-charger backup supply capability for an external coin-cell/Li battery
- Write-protect and robust data-write integrity controls
- Parallel 8-bit interface (standard MCU compatibility) with address and control signals
- Industrial temperature range suitable for harsh applications
- Available in multiple package/form options (e.g., surface-mount and through-hole variants)
Typical uses: data logging, event timing, secure/safe data storage in embedded systems, and applications needing nonvolatile RAM with timekeeping. For exact densities, timings, and package options, consult the specific DS1245Y-70+ datasheet.
Pinout
- Pin count: 28 pins (28-pin package).
- Function: Battery-backed NVSRAM with an integrated real-time clock (NSVRAM). It provides nonvolatile RAM data storage powered by an internal backup battery (retains data when main power is off) and includes RTC functionality.
- Function: Battery-backed NVSRAM with an integrated real-time clock (NSVRAM). It provides nonvolatile RAM data storage powered by an internal backup battery (retains data when main power is off) and includes RTC functionality.
Manufacturer
- Manufacturer: Dallas Semiconductor (DS).
- What kind of company: An American semiconductor company specializing in memory ICs (e.g., NVSRAM, real-time clocks) and other mixed-signal ICs. It was later acquired by Maxim Integrated (now part of Analog Devices).
- What kind of company: An American semiconductor company specializing in memory ICs (e.g., NVSRAM, real-time clocks) and other mixed-signal ICs. It was later acquired by Maxim Integrated (now part of Analog Devices).
Application
Applications of DS1245Y-70+ include:
- Systems needing fast random-access memory with nonvolatile backup and power-failure protection
- Data logging (industrial, medical, telecom)
- Embedded control/automation (PLC, motor drives)
- Automotive/telematics data backup and calibration data
- POS terminals and consumer electronics requiring preserved state
- Firmware/configuration storage with battery backup
- Rugged aerospace/defense equipment for reliable long-term data retention and time-stamped data (RTC-synced)
- Systems needing fast random-access memory with nonvolatile backup and power-failure protection
- Data logging (industrial, medical, telecom)
- Embedded control/automation (PLC, motor drives)
- Automotive/telematics data backup and calibration data
- POS terminals and consumer electronics requiring preserved state
- Firmware/configuration storage with battery backup
- Rugged aerospace/defense equipment for reliable long-term data retention and time-stamped data (RTC-synced)
Package
DS1245Y-70+ is in an 8-pin plastic DIP (through-hole) package.
