PT7C4302ZEEX

PT7C4302ZEEX Datasheet

PT7C4302

Part	Datasheet
PT7C4302ZEEX	PT7C4302ZEEX (pdf)

Related Parts	Information
PT7C4302ZEE	PT7C4302ZEE

PDF Datasheet Preview
PT7C4302 Real-time Clock Module 3-wire Interface • Using external 32.768kHz quartz crystal • 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 • 31-byte, nonvolatile NV RAM for data storage • Time keeping voltage 1.5V to 5.5V • Uses less than 300nA at 2.0V • Simple 3-wire interface • Serial I/O for minimum pin count • Burst mode for reading/writing successive addresses in clock/RAM • TTL-compatible VCC = 5V • Optional industrial temperature range -40°C to +85°C • Battery backup • Trickle charger on chip for rechargeable energy source backup The PT7C4302 serial real-time clock is a lowpower clock/calendar with a programmable square-wave output and 31 bytes of nonvolatile RAM. Address and data are transferred serially via a 3wire bus. The clock/calendar 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 clock operates in either the 24-hour or 12-hour format with AM/PM indicator. Table 1 shows the basic functions of PT7C4302. More details are shown in section overview of functions. Pin Assignment PT7C4302 1 VCC2 VCC1 8 SCLK 7 I/O 6 4 GND RST 5 Pin Description DIP-8 SOIC-8 Pin no. Pin Type VCC 2 Primary power. When VCC2 is greater than VCC1 + 0.2V, VCC2 will power the IC. While VCC2<VCC1, VCC1 will power the IC.1 X1 I Oscillator Circuit Input. Together with X2, 32.768kHz crystal is connected between them. X2 O Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between them. 4 GND P Ground. Reset. The reset signal must be asserted high during a read or a write. This pin has a internal pulldown resistor. I/ Serial Data Input/Output. I/O is the input/output pin for the 3-wire serial interface. The pin has a O internal pull-down resistor. SCL K Serial Clock Input. SCLK is used to synchronize data movement on the 3-wire serial interface. The pin has a internal pull-down resistor. VCC 1 Backup power. When VCC2 is greater than VCC1 + 0.2V, VCC2 will power the IC. While VCC2<VCC1, VCC1 will power the IC. 1 Note*1 If VCC1 connects to battery, the battery voltage VCC1 has to be lower than VCC2 - 0.2Vwhen IC is read and written. 2015-11-0004 PT0225-6 11/25/15 1 PT7C4302 Real-time Clock Module 3-wire Interface Function Block VCC2 VCC1 Counter Chain Power Manager PT7C4302 Time Counter Sec,Min,Hour,Day,Date,Month,Year 31 x 8 RAM Ordering Information Package Code PT7C4302WE PT7C4302WEX PT7C4302ZEE PT7C4302ZEEX Notes E = Pb-free and Green Adding X Suffix= Tape/Reel Package Lead Free and Green 8-Pin SOIC W Lead Free and Green 8-Pin SOIC W Tape/Reel Lead free and Green 8-Pin TDFN ZE Lead free and Green 8-Pin TDFN ZE Tape/Reel Pericom Semiconductor Corporation  1-800-435-2336  Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom 2015-11-0004 PT0225-6 11/25/15 14

PDF Datasheet Preview

PT7C4302

Real-time Clock Module 3-wire Interface
• Using external 32.768kHz quartz crystal
• 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
• 31-byte, nonvolatile NV RAM for data storage
• Time keeping voltage 1.5V to 5.5V
• Uses less than 300nA at 2.0V
• Simple 3-wire interface
• Serial I/O for minimum pin count
• Burst mode for reading/writing successive addresses in clock/RAM
• TTL-compatible VCC = 5V
• Optional industrial temperature range -40°C to +85°C
• Battery backup
• Trickle charger on chip for rechargeable energy source backup

The PT7C4302 serial real-time clock is a lowpower clock/calendar with a programmable square-wave output and 31 bytes of nonvolatile RAM.

Address and data are transferred serially via a 3wire bus. The clock/calendar 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 clock operates in either the 24-hour or 12-hour format with AM/PM indicator.

Table 1 shows the basic functions of PT7C4302. More details are shown in section overview of functions.

Pin Assignment

PT7C4302
1 VCC2

VCC1 8

SCLK 7

I/O 6
4 GND

RST 5

Pin Description

DIP-8 SOIC-8

Pin no. Pin Type

VCC 2

Primary power. When VCC2 is greater than VCC1 + 0.2V, VCC2 will power the IC. While VCC2<VCC1, VCC1 will power the IC.*1

X1 I Oscillator Circuit Input. Together with X2, 32.768kHz crystal is connected between them.

X2 O Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between them.
4 GND P Ground.

Reset. The reset signal must be asserted high during a read or a write. This pin has a internal pulldown resistor.

I/ Serial Data Input/Output. I/O is the input/output pin for the 3-wire serial interface. The pin has a O internal pull-down resistor.

SCL K

Serial Clock Input. SCLK is used to synchronize data movement on the 3-wire serial interface. The pin has a internal pull-down resistor.

VCC 1

Backup power. When VCC2 is greater than VCC1 + 0.2V, VCC2 will power the IC. While VCC2<VCC1, VCC1 will power the IC. *1

Note*1 If VCC1 connects to battery, the battery voltage VCC1 has to be lower than VCC2 - 0.2Vwhen IC is read and written.
2015-11-0004

PT0225-6 11/25/15 1

PT7C4302 Real-time Clock Module 3-wire Interface

Function Block

VCC2 VCC1

Counter Chain

Power Manager

PT7C4302

Time Counter

Sec,Min,Hour,Day,Date,Month,Year
31 x 8 RAM
Ordering Information

Package Code

PT7C4302WE

PT7C4302WEX

PT7C4302ZEE

PT7C4302ZEEX

Notes E = Pb-free and Green Adding X Suffix= Tape/Reel

Package Lead Free and Green 8-Pin SOIC W Lead Free and Green 8-Pin SOIC W Tape/Reel Lead free and Green 8-Pin TDFN ZE Lead free and Green 8-Pin TDFN ZE Tape/Reel

Pericom Semiconductor Corporation  1-800-435-2336 

Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom
2015-11-0004

PT0225-6 11/25/15 14

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived PT7C4302ZEEX Datasheet file may be downloaded here without warranties.

Datasheet ID: PT7C4302ZEEX 510117