24LCS22AT-I/SN Microchip

24LCS22A 24LCS22A 2K VESA E-EDID Serial EEPROM Features Package Types PDIP/SOIC Single supply with operation down to 2.5V Supports Enhanced EDID (E-EDID ) 1.3 *NC 1 8 VCC Completely implements DDC1/DDC2 interface for monitor identification, including recovery to DDC1 *NC 2 7 VCLK 2K-bit Serial EEPROM Low-power CMOS WP 3 6 SCL technology: - 1 mA typical active current VSS 4 5 SDA -10 A standby current typical at 5.5V 2 2-wire serial interface bus, I C compatible 100 kHz (2.5V) and 400 kHz (5V) compatibility * Pins labeled NC have no internal connection Self timed write cycle (including auto-erase) Hardware write-protect pin Page write buffer for up to eight bytes Block Diagram 1,000,000 erase write cycles Data retention > 200 years WP ESD protection > 4000V HV Generator 8-pin DIP and SOIC packages Available temperature ranges: I/O Memory - Industrial (I) -40C to +85C EEPROM Control Control Array XDEC Logic Logic Description Page Latches The Microchip Technology Inc. 24LCS22A is a 256 x 8-bit SDA SCL dual-mode Electrically Erasable PROM (EEPROM). This YDEC device is designed for use in applications requiring VCLK storage and serial transmission of configuration and Sense Amp. control information. Two modes of operation have been Vcc R/W Control implemented: Transmit-only mode (1K-bit) and Vss Bidirectional mode (2K-bit). Upon power-up, the device will be in the Transmit-only mode, sending a serial bit stream of the memory array from 00h to 7Fh, clocked by the VCLK pin. A valid high-to-low transition on the SCL pin will cause the device to enter the Transition mode, and 2 look for a valid control byte on the I C bus. If it detects a valid control byte from the master, it will switch into Bidirectional mode, with byte selectable read/write capability of the entire 2K memory array using SCL. If no control byte is received, the device will revert to the Transmit-only mode after it receives 128 consecutive VCLK pulses while the SCL pin is idle. The 24LCS22A is available in standard 8-pin DIP and SOIC packages. The 24LCS22A features a flexible Write-Protect pin which is enabled by writing to address 7Fh (usually the checksum in VESA applications. 2003 Microchip Technology Inc. DS21682B-page 124LCS22A 1.0 ELECTRICAL CHARACTERISTICS () Absolute Maximum Ratings VCC.............................................................................................................................................................................7.0V All inputs and outputs w.r.t. VSS ......................................................................................................... -0.6V to VCC +1.0V Storage temperature ...............................................................................................................................-65C to +150C Ambient temperature with power applied................................................................................................-65C to +125C ESD protection on all pins ...................................................................................................................................................... 4kV Notice: Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. TABLE 1-1: DC CHARACTERISTICS Vcc = +2.5V to 5.5V DC CHARACTERISTICS Industrial (I): TA = -40C to +85C Param. Sym Characteristic Min. Max. Units Test Conditions No. SCL and SDA pins: IH High-level input voltage 0.7 VCC V D1 V D2 VIL Low-level input voltage 0.3 VCC V Input levels on VCLK pin: D3 VIH High-level input voltage 2.0 V VCC 2.7V (Note) D4 VIL Low-level input voltage 0.2 VCC VVCC 2.7V (Note) D5 VHYS Hysteresis of Schmitt Trigger .05 VCC V (Note) Inputs D6 VOL1 Low-level output voltage 0.4 V IOL = 3 mA, VCC = 2.5V (Note) D7 VOL2 Low-level output voltage 0.6 V IOL = 6 mA, VCC = 2.5V D8 ILI Input leakage current 1 AVIN = 0.1V to VCC D9 ILO Output leakage current 1 AVOUT = 0.1V to VCC D10 CIN, COUT Pin capacitance 10 pFVCC = 5.0V (Note) (all inputs/outputs) TA = 25C, FCLK = 1 MHz Operating current: D10 ICC WRITE Operating current 3 mA VCC = 5.5V, D11 ICC READ Operating current 1 mA VCC = 5.5V, SCL = 400 kHz D12 ICCS Standby current 30 A VCC = 3.0V, SDA = SCL = VCC 100 A VCC = 5.5V, SDA = SCL = VCC VCLK = VSS Note: This parameter is periodically sampled and not 100% tested. DS21682B-page 2 2003 Microchip Technology Inc.