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Details, datasheet, quote on part number:PCF8570C
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Datasheet text preview:
INTEGRATED CIRCUITS
DATA SHEET
PCF8570 256 × 8-bit static low-voltage RAM with I2C-bus interface
Preliminary specification File under Integrated Circuits, IC12 August 1994
Philips Semiconductors
Philips Semiconductors
Preliminary specification
256 × 8-bit static low-voltage RAM with I2C-bus interface
FEATURES · Operating supply voltage 2.5 to 6.0 V · Low data retention voltage; minimum 1.0 V · Low standby current; maximum 15 µA · Power saving mode; typical 50 nA · Serial input/output bus (I2C-bus) · Address by 3 hardware address pins · Automatic word address incrementing · Available in DIP8 and SO8L packages. APPLICATIONS · Telephony: RAM expansion for stored numbers in repertory dialling (e.g. PCD33XX applications) · General purpose RAM for applications requiring extremely low current and low-voltage RAM retention (i.e. battery or capacitor backed) · Radio, television and video cassette recorder: channel presets · General purpose: RAM expansion for the microcontroller families PCD33XX, PCF84CXX, P80CLXXX and most other microcontrollers. QUICK REFERENCE DATA SYMBOL VDD IDD IDDR Tamb Tstg supply voltage supply current (standby) supply current (power-saving mode) operating ambient temperature storage temperature fSCL = 0 Hz Tamb = 25 °C PARAMETER CONDITIONS MIN. 2.5 - - -40 -65 GENERAL DESCRIPTION
PCF8570
The PCF8570 is a low power static CMOS RAM. The PCF8570 is organized as 256 words by 8-bits. Addresses and data are transferred serially via a two-line bidirectional bus (I2C-bus). The built-in word address register is incremented automatically after each written or read data byte. Three address pins, A0, A1 and A2 are used to define the hardware address, allowing the use of up to 8 devices connected to the bus without additional hardware.
MAX. 6.0 15 400 +85 +150
UNIT µA nA °C °C
ORDERING INFORMATION PACKAGE TYPE NUMBER PINS PCF8570P PCF8570T 8 8 PIN POSITION DIP8 SO8L MATERIAL plastic plastic CODE SOT97-1 SOT176-1
August 1994
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Philips Semiconductors
Preliminary specification
256 × 8-bit static low-voltage RAM with I2C-bus interface
BLOCK DIAGRAM
PCF8570
handbook, full pagewidth
PCF8570C
A0 A1 A2 SCL SDA 5 1 2 3 6 INPUT FILTER
WORD ADDRESS REGISTER
7
ROW SELECT
MEMORY CELL ARRAY
I C BUS CONTROL
2
COLUMN SELECT
MULTIPLEXER
VDD VSS TEST
8 4 7
POWER ON RESET
SHIFT REGISTER
8
R/W CONTROL
MLB928
Fig.1 Block diagram.
PINNING SYMBOL A0 A1 A2 VSS SDA SCL TEST PIN 1 2 3 4 5 6 7 DESCRIPTION hardware address input 0 hardware address input 1 hardware address input 2 negative supply serial data input/output serial clock input test output for test speed-up; must be connected to VSS when not in use (power saving mode, see Figs 13 and 14) positive supply
page
A0 A1 A2 VSS
1 2
8 7
VDD TEST SCL SDA
PCF8570C
3 4
MLB929
6 5
Fig.2 Pin configuration.
VDD
8
August 1994
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