PT7C4307WEX Pericom Semiconductor, PT7C4307WEX Datasheet
PT7C4307WEX
Specifications of PT7C4307WEX
Available stocks
Related parts for PT7C4307WEX
PT7C4307WEX Summary of contents
Page 1
Features • Using external 32.768kHz quartz crystal • 2 Supports I C-Bus's high speed mode (400 kHz) • Includes time (Hour/Minute/Second) and calendar (Year/Month/Date/Day) counter functions (BCD code) • Programmable square wave output signal • 56-byte, battery-backed, nonvolatile (NV) ...
Page 2
Pin Assignment Pin Description Pin no. Pin Type Oscillator Circuit Input. Together with X2, 32.768kHz crystal is connected between them. Oscillator Circuit Output. Together with X1, 32.768kHz crystal is connected between them When ...
Page 3
Function Block X1 C 32.768 D OSC kHz SQW/OUT Control Register VCC Power Manager VBAT PT0206(08/09) Real-time Clock Module (I PT7C4307 Counter Time Counter Chain (Sec,Min,Hour,Day,Date,Month,Year) Address Decoder Shift Registers 3 Data Sheet PT7C4307 56 x ...
Page 4
Function Description Clock function CPU can read or write data including the year (last two digits), month, date, day, hour, minute, and second. Any (two-digit) year that is a multiple treated as a leap year and ...
Page 5
Control and status register Addr. Description D7 (hex) Control OUT 07 (default) 0 • OUT It controls the output level of the SQW/OUT pin when the square wave output is disabled. OUT Data 0 When SQWE = 0, SQW/OUT ...
Page 6
This bit is used to select between 12-hour clock system and 24-hour clock system. 12, /24 Data 0 24-hour system Read / Write 1 12-hour system This bit is used to select between 12-hour clock ...
Page 7
Addr. Description D7 (hex) Dates 0 04 (default) 0 Months 0 05 (default) 0 Years Y80 06 (default) Undefined Undefined Undefined Undefined Undefined Undefined Undefined Undefined Note: Any registered imaginary time should be replaced by correct time, otherwise it ...
Page 8
Starting and Stopping I C Bus Communications 2 Fig 2. Starting and stopping START condition, repeated START condition, and STOP condition a) START condition SDA level changes from high to low while SCL is at ...
Page 9
Data acknowledge response (ACK signal) When transferring data, the receiver generates a confirmation response (ACK signal, low active) each time an 8-bit data segment is received. If there is no ACK signal from the receiver, it indicates that ...
Page 10
Slave Address 2 The I C bus device does not include a chip select pin such as is found in ordinary logic devices. Instead of using a chip select pin, slave addresses are allocated to each device. All communications ...
Page 11
Read via I C bus a) Standard read b) Simplified read Note: 1. The above steps are an example of transfers of one or two bytes only. There is no limit to the number of bytes transferred ...
Page 12
Maximum Ratings Storage Temperature......................................................................................................-65 o Cto +150 o C Ambient Temperature with Power Applied............................................................-40 o Cto + Supply Voltage to Ground Potential (Vcc to GND)...............................................-0.3V to +6.5V DC Input (All Other Inputs except Vcc & GND)...................................................-0.3V to ...
Page 13
AC Electrical Characteristics Sym V Rising and falling threshold voltage high HM V Rising and falling threshold voltage low HL Signal t f Over the operating range Symbol f SCL clock frequency SCL t START condition set-up time SU;STA ...
Page 14
Recommended Layout for Crystal Note: The crystal, traces and crystal input pins should be isolated from RF generating signals. Built-in Capacitors Specifications and Recommended External Capacitors Parameter X1 to GND Build-in capacitors X2 to GND Recommended External X1 to ...
Page 15
Mechanical Information PE (Lead free 8-pin DIP .355 .400 9.01 10.16 .115 .150 .100 2.921 typical 3.81 2.54 WE (Lead free and Green 8-pin SOIC .185 4.70 .201 5.10 .016 .026 0.406 0.660 REF .050 ...
Page 16
Email: support@pti.com.cnWeb Site: www.pti.com.cn, www.pti-ic.com China: No. 20 Building, 3/F, 481 Guiping Road, Shanghai, 200233, China Tel: (86)-21-6485 0576 Asia Pacific: Unit 1517, 15/F, Chevalier Commercial Centre, 8 Wang Hoi Rd, Kowloon Bay, Hongkong Tel: (852)-2243 3660 U.S.A.: 3545 ...