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-
age generator with one byte of on-chip EEPROM and
one byte of SRAM memory per channel. Each channel
is composed of an independent 8-bit DAC with an asso-
ciated EEPROM/SRAM pair. At power-up, nonvolatile
(NV) EEPROM gamma data is loaded into its corre-
sponding SRAM register that drives the associated 8-bit
DAC. An on-chip control register allows selectable con-
trol of writing to SRAM/EEPROM or SRAM only.
o 8-Bit Gamma DACs, 8 Channels
o 1 Byte EEPROM and 1 Byte SRAM per Channel
o Ultra-Low Power (2mA I , typ)
DD
2
o 400kbps I C Interface
o 9.0V to 15.5V Analog Supply
o 2.7V to 5.5V Digital Supply
The DS3508 is designed for low-power operation and
o 20-Pin TSSOP Package
draws less than 2mA (typ) from the V
supply.
DD
o Address Pin Allows Two DS3508s to Reside on
2
Programming occurs through an I C-compatible serial
interface with support for speeds up to 400kHz.
2
the Same I C Bus
Ordering Information
Applications
TFT-LCD Gamma Buffer
Industrial Controls
PART
TEMP RANGE
-45°C to +95°C
-45°C to +95°C
PIN-PACKAGE
20 TSSOP
DS3508E+
DS3508E+T&R
20 TSSOP
+Denotes a lead-free package.
T&R = Tape and reel.
Typical Operating Circuit
Pin Configuration
TOP VIEW
SCL
SDA
GND
A0
1
2
3
4
5
6
7
8
9
20
V
CC
15.0V
14.8V 8.0V
VHH VHM
19 GM1
18 GM2
17 GM3
16 GM4
15 GM5
14 GM6
13 GM7
12 GM8
11 N.C.
5.0V
8
SOURCE DRIVER
V
DD
V
GM1
GM2
GM3
GM4
CC
DS3508
VHH
VHM
VLM
VLL
2
SDA
SCL
LIQUID-CRYSTAL
DISPLAY
I C
DS3508
GM5
GM6
GM7
GM8
MASTER
A0
GND
VLL VLM
0.2V 7.0V
V
DD
N.C. 10
TSSOP
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.