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MC146823FN from MOT,Motorola

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MC146823FN

Manufacturer: MOT, N/A

V(dd): -0.3 to +8.0V; V(in): -0.5 to +0.5V; 10mA; CMOS parallel interface

Partnumber Manufacturer Quantity Availability
MC146823FN MOT, N/A 465 In Stock

Description and Introduction

V(dd): -0.3 to +8.0V; V(in): -0.5 to +0.5V; 10mA; CMOS parallel interface The MC146823FN is a real-time clock (RTC) and calendar chip manufactured by Motorola (now part of NXP Semiconductors). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:  

### **Manufacturer:**  
- **MOT** (Motorola)  

### **Specifications:**  
- **Type:** Real-Time Clock (RTC) with Calendar  
- **Package:** 20-Pin Plastic DIP (FN)  
- **Supply Voltage:** 2.5V to 5.5V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Timekeeping Accuracy:** Adjustable via external crystal  
- **Clock Frequency:** 32.768 kHz (standard watch crystal)  
- **Battery Backup Support:** Yes (for timekeeping during power loss)  

### **Descriptions:**  
- The MC146823FN is a low-power CMOS real-time clock with a built-in calendar function.  
- It provides seconds, minutes, hours, day, date, month, and year information.  
- Includes alarm functionality with programmable interrupts.  
- Features a watchdog timer and a square-wave output.  
- Supports 12-hour or 24-hour time format.  

### **Features:**  
- **Timekeeping Functions:**  
  - Seconds, minutes, hours, day, date, month, year (including leap year correction)  
- **Alarm Function:** Programmable with interrupt capability  
- **Watchdog Timer:** Configurable timeout period  
- **Square-Wave Output:** Programmable frequency (e.g., 1Hz, 4kHz, 32kHz)  
- **Low Power Consumption:** Suitable for battery-backed applications  
- **Battery Backup Support:** Maintains timekeeping during main power loss  
- **Interface:** Parallel (8-bit data bus)  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

V(dd): -0.3 to +8.0V; V(in): -0.5 to +0.5V; 10mA; CMOS parallel interface

Alternative Part Number

  • MC68HC11E1CFN --: Same 52-pin PLCC package and 8-bit microcontroller family lineage; widely available and functionally similar for legacy designs.
  • MC68HC705C8ACFN --: Pin-compatible PLCC 8-bit MCU from the HC05 family, suitable as a drop-in substitute in many control applications.
  • MC68HC11F1CFN --: Same PLCC footprint and HC11 core architecture, offering comparable peripherals for replacement in existing boards.
  • MC68HC11E1FN --: Same 52-pin PLCC package and 8-bit microcontroller family lineage; widely available and functionally similar for legacy designs.
  • MC68HC705C8FN --: Pin-compatible PLCC 8-bit MCU from the HC05 family, suitable as a drop-in substitute in many legacy control applications.
  • PIC16F877A-I/L --: Popular 8-bit MCU in PLCC-44 package; requires firmware porting but is a viable modern replacement when the original is obsolete.

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