PT7C4311WEX Pericom Semiconductor, PT7C4311WEX Datasheet

IC REAL TIME CLK/CALENDAR 8-SOIC

PT7C4311WEX

Manufacturer Part Number
PT7C4311WEX
Description
IC REAL TIME CLK/CALENDAR 8-SOIC
Manufacturer
Pericom Semiconductor
Type
Clock/Calendarr
Datasheet

Specifications of PT7C4311WEX

Memory Size
56B
Time Format
Binary
Date Format
Binary
Interface
I²C, 2-Wire Serial
Voltage - Supply
1.2 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
PT7C4311WEXTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PT7C4311WEX
Manufacturer:
Pericom
Quantity:
2 400
Part Number:
PT7C4311WEX
Manufacturer:
PERICOM
Quantity:
20 000
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Features
Table 1. Basic functions of PT7C4300
PT0322(08/09)
Item
1
2
3
4
5
6
7
8
I
Includes time (Hour/Minute/Second) and calendar
(Century/Year/Month/Date/Day) counter functions
Year 2000 compliant
Automatic switch-over and deselect circuitry
Time keeping voltage: 1.5V to 5.5V
Software clock calibration
56 bytes of general purpose RAM
Ultra-low battery supply current of 1µA
Low operating current of 300µA
Battery or super cap back-up
Operating temperature: -40°C to 85°C
Automatic leap year compensation
Special software programmable output
2
C-Bus compatible
Oscillator
Time
Programmable square wave output (Hz)
Programmable high/low level output
Communication
RAM
Battery backup
Clock calibration
Source: Crystal: 32.768kHz
Oscillator enable/disable
Oscillator fail detect
Time display
Century bit
Time count chain enable/disable
2-wire I
Function
2
C bus
12-hour
24-hour
1
Description
The PT7C4311 serial real-time clock is a low-power
clock/calendar with a programmable square-wave output.
Address and data are transferred serially via a 2-wire
bidirectional 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 the 24-
hour format indicator.
Table 1 shows the basic functions of PT7C4311. More
details are shown in section: overview of functions.
Ordering Information
PT7C4311WE
Part Number
Real-time Clock Module (I
Lead free and Green 8-Pin SOIC
PT7C4311
512Hz
56×8
-
-
-
Package
Data Sheet
PT7C4311
2
C Bus)
Ver: 2

Related parts for PT7C4311WEX

PT7C4311WEX Summary of contents

Page 1

Features 2 • I C-Bus compatible • Includes time (Hour/Minute/Second) and calendar (Century/Year/Month/Date/Day) counter functions • Year 2000 compliant • Automatic switch-over and deselect circuitry • Time keeping voltage: 1.5V to 5.5V • Software clock calibration • 56 bytes ...

Page 2

Function Block PT0322(08/09) Real-time Clock Module (I 2 Data Sheet PT7C4311 2 C Bus) Ver: 2 ...

Page 3

Pin Configuration Pin Description Pin no. Pin Type Oscillator Circuit Input. Together with X1, 32.768kHz crystal is connected between them external clock input Oscillator Circuit Output. Together with X1, 32.768kHz crystal is ...

Page 4

Function Description Overview of Functions 1. 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 ...

Page 5

Registers 1. Allocation of registers Addr. Function *1 (hex) 00 Seconds (00-59) 01 Minutes (00-59) 02 Hours (00-23) 03 Days of the week (01-07) 04 Dates (01-31) 05 Months (01-12) 06 Years (00-99 Control 08~3F RAM Caution ...

Page 6

Control and status register Addr. Description D7 (hex) Control OUT 07 (default OUT • OUT: Set pin 7 output DC level.. OUT Data 1 Set high level at pin 7. Read / Write 0 Set low ...

Page 7

Time Counter Time digit display (in BCD code): • Second digits: Range from and carried to minute digits when incremented from 59 to 00. • Minute digits: Range from and carried to ...

Page 8

Communication Bus Interface 2 a) Overview of I C-BUS 2 The I C bus supports bi-directional communications via two signal lines: the SDA (data) line and SCL (clock) line. A combination of these two signals ...

Page 9

Starting and Stopping I C Bus Communications START condition, repeated START condition, and STOP condition • START condition SDA level changes from high to low while SCL is at high level • STOP condition SDA level changes ...

Page 10

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 11

Write via I C bus Slave address (7 bits Start Slave address + write specification 2 b) Read via I C bus • Standard read Slave address (7 bits) S ...

Page 12

Maximum Ratings Storage Temperature...................................................................................................................-55 o Cto +125 o C Ambient Temperature with Power Applied.........................................................................-40 o Cto + Supply Voltage to Ground Potential (Vcc to GND) ........................................................-0.3V to +7.0V DC Input (All Other Inputs except Vcc & GND).............................................................-0.3V ...

Page 13

DC Electrical Characteristics (Unless otherwise specified 1 Sym. Description Timing data and RAM data maintaining voltage Timing data writing voltage V CC Timing data reading voltage RAM data writing voltage RAM data ...

Page 14

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 15

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 16

Mechanical Information WE(Lead free and Green 8-Pin SOIC) 8 .149 .157 1 .189 4.80 .196 5.00 .016 .053 .026 .068 0.406 0.660 REF .050 BSC 1.27 .013 0.330 .020 0.508 PT0322(08/09) 3.78 3.99 o 0-8 1.35 1.75 X.XX SEATING ...

Page 17

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 ...

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