PCF8583

Features:

` I2C-bus interface operating supply voltage: 2.5 V to 6 V
` Clock operating supply voltage (0 to +70 °C): 1.0 V to 6.0 V
` 240 X 8-bit low-voltage RAM
` Data retention voltage: 1.0 V to 6 V
` Operating current (at fSCL = 0 Hz): max. 50 mA
` Clock function with four year calendar
` Universal timer with alarm and overflow indication
` 24 or 12 hour format
` 32.768 kHz or 50 Hz time base
` Serial input/output bus (I2C)
` Automatic word address incrementing
` Programmable alarm, timer and interrupt function
` Slave address:
        READ: A1 or A3
        WRITE: A0 or A2.


Pinout




Specifications

SYMBOL	PARAMETER	MIN.	MAX.	UNIT
VDD	supply voltage(pin 8)	-0.8	+7.0	V
IDD	supply current(pin 8)	-	50	mA
ISS	supply current(pin 4)	-	50	mA
VI	input voltage	VSS - 0.5	VDD +0.8	V
II	DC input current	-	10	mA
IO	DC input current	-	10	mA
Ptot	total power dissipation	-	300	mW
PO	power dissipation per output	-	50	mW
Tamb	storage temperature	-40	+85
Tstg	operating ambient temperature	-65	+150

Description

The PCF8583 is a clock/calendar circuit based on a 2048-bit static CMOS RAM organized as 256 words by 8 bits. Addresses and data of PCF8583 are  transferred serially via the two-line bidirectional I2C-bus. The built-in word address register PCF8583 is incremented automatically after each written or read data byte. Address pin A0 is used for programming the hardware address, allowing the connection of two devices to the bus without additional hardware.

The built-in 32.768 kHz oscillator circuit PCF8583 and the first 8 bytes of the RAM are used for the clock/calendar and counter functions. The next 8 bytes may be programmed as alarm registers or used as free RAM space.

The remaining 240 bytes of PCF8583 are free RAM locations.