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RS5C372A
Real Time Clock, Volatile, 0 Timer(s), CMOS, PDSO8, SSOP-8RS5C372A
Real Time Clock, Volatile, 0 Timer(s), CMOS, PDSO8, SSOP-8
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RS5C372A DataSheet
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Details
OUTLINEThe RS5C372A is a CMOS type real-time clock which is connected to the CPU via 2-wires and capable of serial transmission of clock and calendar data to the CPU.FEATURES• Time keeping voltage: 1.45V to 6.0V• Lowest supply current: 0.5µA TYP. (0.9µA MAX.) : 3V (25˚C) (1.0µA MAX.) : 3V (–40 to +85˚C)• Connected to the CPU via only 2-wires (I2C bus Interface, MAX.400kHz, address 7bit)• A clock counter (counting hours, minutes, and seconds) and a calendar counter (counting leap years, years, months, days, and days of the week) in BCD codes• Interrupt to the CPU (period of one month to one second, interrupt flag, interrupt halt function) (INTRA, INTRB)• Two systems of alarm functions (days of the week, hours, and minutes) (INTRA, INTRB)• Oscillation halt sensing to judge internal data validity• Clock output of 32.768kHz (32.000kHz) (output controllable via a register) ... (Nch. open drain output)• Second digit adjustment by ±30 seconds• Automatic leap year recognition up to the year 2099• 12-hour or 24-hour time display selectable• Oscillation stabilizing capacity (CG, CD) incorporated• High precision time trimming circuit• Oscillator of 32.768kHz or 32.000kHz may be used• CMOS logic• Package: 8pin SSOPAPPLICATIONS• Communication devices (multi function phone, portable phone, PHS or pager)• OA devices (fax, portable fax)• Computer (desk-top and mobile PC, portable word-processor, PDA, electric note or video game)• AV components (portable audio unit, video camera,camera, digital camera or remote controller)• Home appliances (rice cooker, electric oven)• Other (car navigation system, multi-function watch)
Key Features
- Time keeping voltage: 1.45V to 6.0V
- Lowest supply current: 0.5µA TYP. (0.9µA MAX.) : 3V (25˚C)
- (1.0µA MAX.) : 3V (–40 to +85˚C)
- Connected to the CPU via only 2-wires
- (I2C bus Interface, MAX.400kHz, address 7bit)
- A clock counter (counting hours, minutes, and seconds)
- and a calendar counter
- (counting leap years, years,
- months, days, and days of the week) in BCD codes
- Interrupt to the CPU (period of one month to one second,
- interrupt flag, interrupt halt function) (INTRA, INTRB)
- Two systems of alarm functions
- (days of the week, hours, and minutes) (INTRA, INTRB)
- Oscillation halt sensing to judge internal data validity
- Clock output of 32.768kHz (32.000kHz)
- (output controllable via a register) ... (Nch. open drain output)
- Second digit adjustment by ±30 seconds
- Automatic leap year recognition up to the year 2099
- 12-hour or 24-hour time display selectable
- Oscillation stabilizing capacity (CG, CD) incorporated
- High precision time trimming circuit
- Oscillator of 32.768kHz or 32.000kHz may be used
- CMOS logic
- Package: 8pin SSOP
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Pbfree Code | No | Rohs Code | No |
| Part Life Cycle Code | Transferred | Part Package Code | SOIC |
| Pin Count ! | 8 | Reach Compliance Code | |
| ECCN Code | EAR99 | HTS Code ! | 8542.39.00.01 |
| Additional Feature ! | SECOND DIGIT ADJUSTMENT BY +/-30 SECONDS | Clock Frequency-Max | 0.032 MHz |
| Information Access Method | I2C | Interrupt Capability ! | Y |
| JESD-30 Code | R-PDSO-G8 | JESD-609 Code | e0 |
| Length | 4.4 mm | Moisture Sensitivity Level | 1 |
| Number of Terminals | 8 | Number of Timers | |
| Operating Temperature-Max | 85 °C | Operating Temperature-Min | -40 °C |
| Package Body Material | PLASTIC/EPOXY | Package Code | LSSOP |
| Package Equivalence Code | SSOP8,.25 | Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH | Power Supplies ! | 2/6 V |
| Qualification Status ! | Not Qualified | Seated Height-Max | 1.45 mm |
| Supply Voltage-Max | 6 V | Supply Voltage-Min | 1.7 V |
| Supply Voltage-Nom | 3 V | Surface Mount ! | YES |
| Technology | CMOS | Temperature Grade ! | INDUSTRIAL |
| Terminal Finish | TIN LEAD | Terminal Form ! | GULL WING |
| Terminal Pitch ! | 0.65 mm | Terminal Position | DUAL |
| Time-Min | SECONDS | Volatile | YES |
| Width | 3.5 mm | uPs/uCs/Peripheral ICs Type | TIMER, REAL TIME CLOCK |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is RS5C372A?
The RS5C372A is a real-time clock (RTC) module with an integrated crystal oscillator designed by EPSON. It is a compact and accurate timing solution for various electronic devices, including digital cameras, portable media players, and industrial control systems.
How Does RS5C372A Work?
The RS5C372A works by providing precise timing and calendar functions to electronic systems. It uses an integrated crystal oscillator to generate accurate clock signals and features a battery backup function to maintain timekeeping during power disruptions. The module communicates with the host system using an I2C interface, allowing easy integration and configuration.
How Many Pins does RS5C372A have and What are the Functions of the Pinout Configuration?
The RS5C372A is housed in a compact 8-pin SOP (Small Outline Package) package. The pinout configuration includes:
- VDD: Positive power supply pin.
- VSS: Ground pin.
- SCL: Serial clock input for I2C communication.
- SDA: Serial data input/output for I2C communication.
- 32KHZ: 32kHz output for external use.
- VBAT: Battery backup input for maintaining clock operation during power loss.
What are the Pros and Cons of RS5C372A?
Pros:
- Compact Size: The small SOP package makes it suitable for space-constrained designs.
- Integrated Oscillator: Eliminates the need for an external crystal, reducing component count and board space.
- Battery Backup: Ensures continuous timekeeping during power interruptions for enhanced reliability.
- I2C Interface: Offers simple and versatile communication with the host system.
Cons:
- Single Voltage Supply: May not be suitable for systems with multiple voltage domains.
- Temperature Sensitivity: Like all crystal oscillators, the accuracy of the timing may be affected by temperature variations.
Are There Any Equivalents/Alternatives to RS5C372A for Recommendation?
- The DS3231 from Maxim Integrated is a similar RTC module with high accuracy and temperature compensation.
- Alternatives to the RS5C372A include the PCF8563 from NXP Semiconductors and the MCP7940N from Microchip Technology.