DS3508 Rev 1 3/08 2 I C, 8-Channel Gamma Buffer with EEPROM General Description Features The DS3508 is a programmable 8-channel gamma volt- 8-Bit Gamma DACs, 8 Channels age generator with one byte of on-chip EEPROM and 1 Byte EEPROM and 1 Byte SRAM per Channel one byte of SRAM memory per channel. Each channel is composed of an independent 8-bit DAC with an asso- Ultra-Low Power (2mA I , typ) DD ciated EEPROM/SRAM pair. At power-up, nonvolatile 2 400kbps I C Interface (NV) EEPROM gamma data is loaded into its corre- sponding SRAM register that drives the associated 8-bit 9.0V to 15.5V Analog Supply DAC. An on-chip control register allows selectable con- 2.7V to 5.5V Digital Supply trol of writing to SRAM/EEPROM or SRAM only. The DS3508 is designed for low-power operation and 20-Pin TSSOP Package draws less than 2mA (typ) from the V supply. DD Address Pin Allows Two DS3508s to Reside on 2 Programming occurs through an I C-compatible serial 2 the Same I C Bus interface with support for speeds up to 400kHz. Ordering Information Applications TFT-LCD Gamma Buffer PART TEMP RANGE PIN-PACKAGE Industrial Controls DS3508E+ -45C to +95C 20 TSSOP DS3508E+T&R -45C to +95C 20 TSSOP +Denotes a lead-free package. T&R = Tape and reel. Typical Operating Circuit Pin Configuration TOP VIEW SCL1V20 CC 15.0V 14.8V 8.0V 5.0V SDA 2 19 GM1 8 SOURCE DRIVER V VHH VHM DD GND 3 18 GM2 V GM1 CC GM2 A0 4 17 GM3 GM3 GM4 DS3508 VHH 5 16 GM4 2 SDA I C LIQUID-CRYSTAL DS3508 VHM 6 15 GM5 MASTER SCL GM5 DISPLAY GM6 A0 GM7 VLM 7 14 GM6 GND GM8 VLL VLM VLL 8 13 GM7 V 9 12 GM8 DD 0.2V 7.0V N.C. 10 11 N.C. TSSOP Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.2 I C, 8-Channel Gamma Buffer with EEPROM ABSOLUTE MAXIMUM RATINGS Voltage Range on V and Junction Temperature......................................................+125C DD VHH Relative to GND ..........................................-0.5V to +16V Operating Temperature Range ...........................-45C to +95C Voltage Range on VHM, VLM, and Programming Temperature Range .........................0C to +70C VLL Relative to GND............................................-0.5V to +12V Storage Temperature.........................................-55C to +125C Voltage Range on V , SDA, SCL, and Soldering Temperature..............................................Refer to the CC A0 Relative to GND ............................................-0.5V to +6.0V IPC/JEDEC J-STD-020 Specification. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS (T = -45C to +95C) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Analog Supply Voltage V (Note 1) +9.0 +15.5 V DD VHH, VHM Applies to GM1GM4 V /2 - 1 V - 0.2 V DD DD VLM, VLL Applies to GM5GM8 0.2 V /2 + 1 V DD VHHVHM and VLMVLL V 3.0 V REF Digital Voltage Supply V (Note 1) 2.7 5.5 V CC Input Logic 0 (A0, SDA, SCL) V 0.3 x V V IL CC Input Logic 1 (A0, SDA, SCL) V 0.7 x V V IH CC INPUT ELECTRICAL CHARACTERISTICS (V = +2.7V to +5.5V, T = -45C to +95C.) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Analog Supply Current I V = 15.5V (Note 2) 2 4 mA DD DD Digital Supply Current, NV Read I f = 400kHz 0.2 1.0 mA CC SCL or Write Digital Supply Standby Current I V = 5.5V (Note 3) 2 10 A STBY CC Input Leakage I V = 5.5V -1 +1 A IL CC (SDA, SCL, A0) Input Resistance at VHH, VHM, R 1 M IN VLM, VLL 2 DS3508