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BQ4845S Real Time Clock IC SMT Benchmarq

BQ4845S Real Time Clock IC SMT Benchmarq

Manufacturer: Benchmarq
Part Number: BQ4845S
Package: SOIC
Lead/Terminal Type: Surface Mount
Number Leads/Terminals: 28

Price: $5.50
194 available for immediate delivery
Code: G497APF07
Weight: 0.03oz ONZ
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Additional Information

Real Time Clock ICs
Parallel RTC with CPU Supervisor

Features
- Real-Time Clock counts seconds through years in BCD format
- On-chip battery-backup switchover circuit with nonvolatile control for external SRAM
- Less than 500nA of clock operation current in backup mode
- Microprocessor reset valid to VCC = VSS
- Independent watchdog timer with a programmable time-out period
- Power-fail interrupt warning
- Programmable clock alarm interrupt active in battery-backup mode
- Programmable periodic interrupt
- Battery-low warning

Recommended DC Operating Conditions
Supply voltage (VCC): 4.75V to 5.5V
Input low voltage: -0.3V to 0.8V
Input high voltage: 2.2V to VCC + 0.3V
Backup cell voltage: 2.3V to 4.0V

DC Electrical Characteristics (TA = TOPR, VCC min ≤ VCC ≤ VCC max)
Input leakage current (VIN = VSSS to VCC): ±1uA max.
Output high voltage (IOH = -2.0mA): 2.4V min.
Operating supply current (Min. cycle duty = 100%,CS = VIL, I I/O = 0mA): 12mA typ.
Supply switch-over voltage: VBC typ.
Battery operation current (VBC = 3V, TA = 25°C, no load on VOUT or CEOUT): 0.3uA typ.
Power-fail-detect voltage: 4.62V typ.
Watchdog input low current (0 < VWDI < 0.8V): -10uA typ.

Crystal Specifications (DT-26 or Equivalent)
Oscillation frequency: 32.768kHz typ.
Load capacitance: 6.0pF typ.
Series resistance: 45KΩ max.
Drive level: 1uW max.

Applications:
- Fax Machines
- Copiers
- Industrial Control Systems
- Point-of-Sale Terminals
- Data Loggers
- Computers

Manufactured by: Benchmarq
Part Number: BQ4845S

Full Datasheet: Benchmarq SMT IC BQ4845S