Alternatives to NXP PCF8523T/1,118
NXP PCF8523T/1,118 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 PCF8523T/1,118NXP |  MCP7940N-I/SNMicrochip Technology | MCP79410-I/SNMicrochip Technology | +4more | |
|---|---|---|---|---|
| FFF Compatibility | The pinout matches the target's pinout one-to-one (OSCI, OSCO, VBAT, VSS, SDA, SCL, MFP/INT, VDD/VCC).Both parts use a standard 8-SOIC (150 mil / 3.90 mm width) package style.Fully meets the operating voltage, I2C speed, and battery backup timekeeping of the original PCF8523T. | The 8-SOIC pin configuration is identical to the target PCF8523T.Supplied in the same 8-SOIC package style with a 3.90 mm body width.Supports full battery backup switchover functionality and covers the original performance characteristics. | ||
 AI Summary | PCF8523T/1,118 by NXP: Real Time Clock (RTC) IC Clock/Calendar I2C, 2-Wire Serial 8-SOIC (0.154", 3.90mm Width). | This is an active, highly compatible second-source alternative that matches the physical footprint, pinout, and low-voltage operation of the obsolete PCF8523T. It includes battery switchover circuitry, standard I2C, and on-chip SRAM for storage.
| An active drop-in alternative that offers identical pin assignments and low-voltage capabilities. It provides extra value by adding an integrated 1Kb EEPROM for user parameter storage.
| |
| Lifecycle Status | Obsolete | Active | Unknown | |
| Market Availability | In stock | In stock | Unknown | |
| REACH | REACH | REACH | Unknown | |
| RoHS | RoHS | RoHS | Unknown | |
| Description | Real Time Clock (RTC) IC Clock/Calendar I2C, 2-Wire Serial 8-SOIC (0.154", 3.90mm Width) | Real Time Clock (RTC) IC Clock/Calendar 64B I2C, 2-Wire Serial 8-SOIC (0.154", 3.90mm Width) | Real Time Clock (RTC) IC Clock/Calendar I2C, 2-Wire Serial 8-SOIC (0.154", 3.90mm Width) | |
| Manufacturer | NXP | Microchip Technology | Microchip Technology | |
| Type | Clock/Timing | Clock/Timing | Clock/Timing | |
| Datasheet | Open | Open | N/A | |
| Lead Time | 99 weeks | 10 weeks | Unknown | |
| Country of Origin | TW | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0070 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Type | Clock/Calendar | - | - | |
| Features | Alarm, Leap Year, Square Wave Output, Watchdog Timer, Battery Backup | - | - | |
| Interface | I²C, 2-Wire Serial | - | - | |
| Date Format | YY-MM-DD-dd | - | - | |
| Time Format | HH:MM:SS (12/24 hr) | - | - |
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Frequently asked questions
Yes. The NXP PCF8523T/1,118 is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the NXP PCF8523T/1,118 are the MCP7940N-I/SN (Microchip Technology) and the MCP79410-I/SN (Microchip Technology), out of 6 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Yes. The leading alternatives to the PCF8523T/1,118 are fit-, form- and function-compatible — the same package and pinout with matching key electrical specifications — so they drop in without PCB changes. Always confirm the parameters critical to your design against the alternative's datasheet before committing.
The PCF8523T/1,118 (NXP) is a part in the Clock/Timing category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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