RTC-7301SF (B) Epson Timing Integrated Circuit (Small Outline Packages) In Stock
Epson RTC-7301SF (B) is a 4-bit real-time clock module in a 24-pin SSOP package with parallel interface, delivering accurate timekeeping with calendar and alarm functions for industrial controllers and embedded computing systems.
- Manufacturer
- Epson Timing
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- ACTIVE
- Datasheet
- RTC-7301SF (B) Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of RTC-7301SF (B)?
- 4-bit parallel bus interface for direct connection to legacy microcontrollers and MPU data buses
- 24-pin SSOP package balances compact footprint with sufficient I/O for parallel RTC access
- Integrated calendar function supporting year, month, day, hour, minute, and second registers
- On-chip oscillator circuit designed for 32.768 kHz crystal reference
- Battery backup support enables timekeeping during main power interruption
What is RTC-7301SF (B) used for?
RTC-7301SF (B) is used in industrial control panels, point-of-sale terminals, and embedded computing boards that require accurate real-time clock data via a 4-bit parallel bus. Its 24-pin SSOP package and battery backup capability make it suitable for applications where compact size, power outage resilience, and compatibility with parallel-bus microprocessors from -40°C to +85°C are all required.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the RTC-7301SF (B) datasheet?
RTC-7301SF (B) Datasheet DownloadOfficial datasheet from Epson Timing
What are equivalent replacements for RTC-7301SF (B)?
Compatible alternatives and drop-in replacements for RTC-7301SF (B):
suggested
Frequently Asked Questions
How does the 4-bit parallel interface of RTC-7301SF (B) integrate with an 8-bit microprocessor data bus?
RTC-7301SF (B) uses a 4-bit parallel data bus, which can be connected to the lower nibble of an 8-bit MPU data bus using standard address decoding. This requires 4 data lines, plus chip-select, read, and write control signals, making it straightforward to interface with most 8-bit microcontrollers operating at 3.3 V or 5 V logic levels.
What crystal frequency does RTC-7301SF (B) require, and how does it affect oscillator stability?
RTC-7301SF (B) is designed for a 32.768 kHz crystal reference, the industry-standard RTC frequency that divides cleanly to a 1 Hz timekeeping signal. Choosing a crystal with ±20 ppm or better frequency accuracy ensures the RTC accumulates less than 1 minute of drift per month over the -40°C to +85°C operating range.
In an industrial control panel losing mains power, how long can RTC-7301SF (B) maintain accurate time on battery backup?
RTC-7301SF (B) supports battery backup operation from a coin cell such as CR2032 (3 V, approximately 225 mAh). In backup mode the RTC draws microamp-level standby current, enabling timekeeping for several years on a single cell. This ensures the panel resumes with the correct timestamp after a power interruption without requiring manual clock resynchronization.
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About Epson Timing
Epson Timing is a leading electronic component manufacturer. FindMyChip sources Epson Timing ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
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