Product Summary

The PT7C4302 serial real-time clock is a low power clock/calendar with a programmable square-wave output and 31 bytes of nonvolatile RAM. Address and data are transferred serially via a 3- wire bus. The PT7C4302 provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The PT7C4302 operates in either the 24-hour or 12-hour format with AM/PM indicator.

Parametrics

PT7C4302 absolute maximum ratings: (1)Storage Temperature: -65℃ to +150℃; (2)Ambient Temperature with Power Applied: -40℃ to +85℃; (3)Supply Voltage to Ground Potential (Vcc to GND): -0.3V to +6.5V; (4)DC Input (All Other Inputs except Vcc & GND): -0.3V to (Vcc+0.3V); (5)DC Output Voltage (SDA, /INTA, /INTB pins): -0.3V to +6.5V; (6)Power Dissipation: 320mW (depend on package).

Features

PT7C4302 features: (1)Using external 32.768kHz quartz crystal; (2)Real-time clock (RTC) counts seconds, minutes hours, date of the month, month, day of the week, and year with leap-year compensation valid up to 2099; (3)31-byte, nonvolatile (NV) RAM for data storage; (4)Time keeping voltage: 1.5V to 5.5V; (5)Uses less than 300nA at 2.0V; (6)Simple 3-wire interface; (7)Serial I/O for minimum pin count; (8)Burst mode for reading/writing successive addresses in clock/RAM; (9)TTL-compatible (VCC = 5V); (10)Optional industrial temperature range: -40℃ to +85℃; (11)Battery backup; (12)Trickle charger on chip for rechargeable energy source backup.

Diagrams

PT7C4302 circuit diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
PT7C4302WEX
PT7C4302WEX


IC RTC NVSRAM 8SOIC

Data Sheet

0-1: $1.12
1-10: $1.00
10-25: $0.88
25-100: $0.79
100-250: $0.69
250-500: $0.62
500-1000: $0.49
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
PT7C4300
PT7C4300

Other


Data Sheet

Negotiable 
PT7C4302WEX
PT7C4302WEX


IC RTC NVSRAM 8SOIC

Data Sheet

0-1: $1.12
1-10: $1.00
10-25: $0.88
25-100: $0.79
100-250: $0.69
250-500: $0.62
500-1000: $0.49
PT7C4307WEX
PT7C4307WEX


IC RTC ALARM NVSRAM 8SOIC

Data Sheet

0-1: $1.12
1-10: $1.00
10-25: $0.88
25-100: $0.79
100-250: $0.69
250-500: $0.62
500-1000: $0.49
PT7C4311WEX
PT7C4311WEX


IC RTC LEAP YEAR Y2K 8SOIC

Data Sheet

0-1: $1.00
1-10: $0.90
10-25: $0.79
25-100: $0.71
100-250: $0.62
250-500: $0.55
500-1000: $0.44
PT7C4337WEX
PT7C4337WEX


IC RTC ALARM 8SOIC

Data Sheet

0-1: $0.96
1-10: $0.86
10-25: $0.76
25-100: $0.68
100-250: $0.59
250-500: $0.53
500-1000: $0.42
PT7C43390WEX
PT7C43390WEX


IC REAL TIME CLOCK 8SOIC

Data Sheet

0-1: $0.96
1-25: $0.76
25-100: $0.68
100-250: $0.59
250-500: $0.53
500-1000: $0.42