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CAT3626
6-Channel LED Driver with I2CTM Interface
FEATURES
Drives 6 LED channels Independent current on 3 pairs of LEDs I2C serial interface programming Adjustable current to 32mA in 0.5mA step Power efficiency up to 91% Fractional pump 1x/1.5x Low noise input ripple Fixed High Frequency Operation 1MHz "Zero" Current Shutdown Mode Soft start and current limiting Short circuit protection Thermal shutdown protection
PRODUCT DESCRIPTION
The CAT3626 is a high efficiency 1x/1.5x fractional charge pump with programmable dimming current in six LED channels. To ensure uniform brightness in LCD backlight applications, each LED channel delivers an accurate regulated current. Low noise and input ripple is achieved by operating at a constant switching frequency of 1MHz which allows the use of small external ceramic capacitors. The 1x/1.5x fractional charge pump supports a wide range of input voltages from 3V to 5.5V with efficiency up to 91%, and is ideal for Li-Ion battery powered devices. The LED channels are configured into three independent pairs, each containing 2 matched channels. Each pair can be separately programmed from zero to 32mA, 2 in 0.5mA resolution steps, using the I C serial interface. Any individual channel can be disabled while others remain active. When the enable input (EN) is low, the device is in shutdown mode drawing zero current. The device is available in a 16-pad TQFN package with a max height of 0.8mm. Package Marking G626 CDAJ
APPLICATIONS
RGB LEDs LCD and keypad Backlighting Cellular Phones, PDAs Digital Cameras
ORDERING INFORMATION
Part Number Package CAT3626HV4-T2 TQFN-16 (1) CAT3626HV4-GT2 TQFN-16 (2) Quantity per Reel 2000 2000
For Ordering Information details, see page 14.
Notes: (1) Matte-Tin Plated Finish (RoHS-compliant) (2) NiPdAu Plated Finish (RoHS-compliant)
PIN CONFIGURATION
TQFN 16-pad 4 x 4mm (Top View)
LEDA2 LEDB1 LEDB2 LEDC1 16 LEDA1 SDA SCL EN 1 2 3 4 5 VOUT
2
TYPICAL APPLICATION CIRCUIT
1F 1F
15
14
13 12 LEDC2 11 GND 10 C2+ 9 C2-
VIN 3V to 5.5V CIN 1F
C1VIN
C1+
C2-
C2+ VOUT
pair A
pair B
pair C
CAT3626
LEDA1 LEDA2 LEDB1 LEDB2 LEDC1 LEDC2 GND
COUT 1F
ENABLE I2C Interface
EN SDA SCL
20mA
6 VIN
7 C1-
8 C1+
2
I C is a trademark of Philips Corporation. Catalyst Semiconductor is licensed by Philips Corporation to carry the I C bus protocol.
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. MD-5014 Rev. D
CAT3626 ABSOLUTE MAXIMUM RATINGS
Parameters VIN, LEDxx voltage VOUT, C1, C2 voltage EN, SDA, SCL voltage Storage Temperature Range Junction Temperature Range Lead Temperature Ratings 6 7 VIN + 0.7V -65 to +160 -40 to +150 300 Units V V V C C C
RECOMMENDED OPERATING CONDITIONS
Parameter VIN Ambient Temperature Range LED forward voltage ILED per LED pin Range 3 to 5.5 -40 to +85 Up to 4.2 0 to 32 Units V C V mA
Typical application circuit with external components is shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
VIN = 3.6V, EN = High, ambient temperature of 25C (over recommended operating conditions unless specified otherwise) Symbol IQ IQSHDN ILED ILED-ACC ILED-DEV ROUT FOSC ISC_MAX IIN_MAX IEN VHI-EN VLO-EN VHI VLO TSD THYS VUVLO Parameter Quiescent Current Shutdown Current LED Current Range with 6 LEDs LED Current Accuracy LED Channel Matching Output Resistance (open loop) Charge Pump Frequency Output short circuit Current Limit Input Current Limit EN Pin - Input Leakage - Logic High Level - Logic Low Level 2 I C SDA, SCL - High Level Input Voltage - Low Level Input Voltage Thermal Shutdown Thermal Hysteresis Under-voltage lock out (UVLO) threshold VOUT < 0.5V 1x mode, VOUT > 1V -1 1.3 0.7 x VIN 165 20 2 1mA ILED 31mA (ILED - ILEDAVG) / ILEDAVG 1x mode, IOUT = 120mA 1.5x mode, IOUT = 120mA 0.8 Test Conditions 1x mode, all LEDs Off 1x mode, all LEDs On 1.5x mode, all LEDs Off VEN = 0V Min Typ 0.5 2.2 3.5 0 3 3 0.5 2.8 1 60 300 1 0.4 1.3 Max Units mA mA mA A mA % % MHz mA mA A V V V V C C V
1 32
0
0.3 x VIN
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(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3626
A.C. CHARACTERISTICS
For 3V VIN 5.5V, over full ambient temperature range -40 to +125C (over recommended operating conditions unless specified otherwise). Symbol fSCL tAA tBUF tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tR tF tSU:STO tDH Parameter Clock Frequency SCL Low to SDA Data Out and ACK Out Bus Free Time Before a New Transmission Can Start Start Condition Hold Time Clock Low Period Clock High Period Start Condition Setup Time (For a Repeated Condition) Data In Hold Time Data In Setup Time SDA and SCL Rise Time SDA and SCL Fall Time Stop Condition Setup Time Data Out Hold Time 0.6 50 1.2 0.6 1.2 0.6 0.6 0 100 0.3 300 Min Typ Max 400 0.9 Unit kHz s s s s s s ns ns s ns s ns
tF tLOW SCL tSU:STA SDA IN tAA tHD:SDA
tHIGH tLOW
tR
tSU:DAT
tSU:STO
tHD:DAT tDH
tBUF
SDA OUT
Figure 1. I2C Bus Timing Characteristics
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. MD-5014 Rev. D
CAT3626 TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 90mA (6 LEDs at 15mA), EN = VIN, CIN = C1 = C2 = COUT = 1F, TAMB = 25C, unless otherwise specified. Efficiency vs. Supply Voltage (6 LEDs)
100 90 EFFICIENCY [%]
EFFICIENCY [%]
Efficiency vs. Total LED Current (6 LEDs)
100 90 80 70 60 50 40 VIN = 3.2V (1.5x mode) VIN = 4V (1x mode)
1x Mode
15mA per LED
80 70 60 50 40 4.2 4.0 3.8 3.6 3.4 3.2 3.0 SUPPLY VOLTAGE [V] 20mA per LED 1.5x Mode
0
50 100 150 200 TOTAL LED CURRENT [mA]
Quiescent Current vs. Supply Voltage (1x Mode)
QUIESCENT CURRENT [mA] 0.8 0.6 0.4 6 LEDs OFF 0.2 0 3.0 3.2 3.4 3.6 3.8 4.0 4.2 SUPPLY VOLTAGE [V]
Quiescent Current vs. Temperature (1x Mode)
QUIESCENT CURRENT [mA]. 0.8 0.6 0.4 0.2 6 LEDs OFF 0.0 -40 0 40 80 TEMPERATURE [C] 120
Quiescent Current vs. Supply Voltage (1.5x Mode)
QUIESCENT CURRENT [mA]. 5 4 3 2 1 0 3.0 3.2 3.4 3.6 3.8 4.0 SUPPLY VOLTAGE [V] 4.2 6 LEDs OFF
Quiescent Current vs. Temperature (1.5x Mode)
QUIESCENT CURRENT [mA]. 5 4 3 2 1 6 LEDs OFF 0 -40 0 40 80 TEMPERATURE [C] 120
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(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3626 TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 90mA (6 LEDs at 15mA), EN = VIN, CIN = C1 = C2 = COUT = 1F, TAMB = 25C, unless otherwise specified. LED Current Change vs. Supply Voltage
5.0 4.0 3.0 2.0 1.0 0.0 -1.0 -2.0 -3.0 -4.0 -5.0 3.0 LED CURRENT CHANGE [%]
LED Current Change vs. Temperature
5.0 4.0 3.0 2.0 1.0 0.0 -1.0 -2.0 -3.0 -4.0 -5.0 -40 -20 0 20 40 60 TEMPERATURE [C] 80 LED CURRENT CHANGE [%]
1x Mode
1.5x Mode
3.2 3.4 3.6 3.8 4.0 SUPPLY VOLTAGE [V]
4.2
Switching Frequency vs. Supply Voltage
SWITCHING FREQUENCY [MHz] 1.3 1.2 1.1 1.0 0.9 0.8 0.7 3.0 3.2 3.4 3.6 3.8 SUPPLY VOLTAGE [V] 4.0
Switching Frequency vs. Temperature
SWITCHING FREQUENCY [MHz] 1.3 1.2 1.1 1.0 0.9 0.8 0.7 -40 0 40 80 TEMPERATURE [C] 120
Output Resistance vs. Supply Voltage (1x Mode)
1.0 OUTPUT RESISTANCE [] .
Output Resistance vs. Supply Voltage(1.5x Mode)
4.0 OUTPUT RESISTANCE [] . 3.5 3.0 2.5 2.0 1.5 1.0 3.0 3.2 3.4 3.6 3.8 4.0 SUPPLY VOLTAGE [V] 4.2
0.8 0.6 0.4 0.2 0.0 3.0 3.2 3.4 3.6 3.8 4.0 SUPPLY VOLTAGE [V] 4.2
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. MD-5014 Rev. D
CAT3626 TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 90mA (6 LEDs at 15mA), EN = VIN, CIN = C1 = C2 = COUT = 1F, TAMB = 25C, unless otherwise specified.
Power Up with 6 LEDs at 15mA (1x Mode)
Power Up with 6 LEDs at 15mA (1.5x Mode)
Enable Power Down (1x Mode)
Enable Power Down (1.5x Mode)
Switching Waveforms in 1.5x Mode
Operating Waveforms in 1x Mode
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(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3626 TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 90mA (6 LEDs at 15mA), EN = VIN, CIN = C1 = C2 = COUT = 1F, TAMB = 25C, unless otherwise specified.
Line Transient Response in 1x mode
Foldback Current Limit
4.0 OUTPUT VOLTAGE [V] 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0 100 200 300 OUTPUT CURRENT [mA] 400 1x Mode
SDA, SCL VIH vs. Supply Voltage
4.0 3.5 3.0 VIH [V] 2.5 2.0 1.5 1.0 0.5 0.0 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE [V] 5.5
SDA, SCL VIL vs. Supply Voltage
4.0 3.5 3.0 VIL [V] 2.5 2.0 1.5 1.0 0.5 0.0 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE [V] 5.5
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. MD-5014 Rev. D
CAT3626
PIN DESCRIPTIONS
Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name LEDA1 SDA SCL EN VOUT VIN C1C1+ C2C2+ GND LEDC2 LEDC1 LEDB2 LEDB1 LEDA2 TAB Function Cathode terminal of LED A1 I2C Serial data input/output I2C Serial clock input Enable input Charge pump output connected to the LED anodes Supply voltage Bucket capacitor 1 terminal Bucket capacitor 1 terminal Bucket capacitor 2 terminal Bucket capacitor 2 terminal Ground reference Cathode terminal of LED C2 Cathode terminal of LED C1 Cathode terminal of LED B2 Cathode terminal of LED B1 Cathode terminal of LED A2 Connect to Ground on PCB
PIN FUNCTION
VIN is the supply pin for the charge pump. A small 1F ceramic bypass capacitor is required between the VIN pin and ground near the device. The operating input voltage range is from 2.2V to 5.5V. Whenever the input supply falls below the undervoltage threshold (2V), all LEDs channels will be automatically disabled. EN is the enable logic input for the driver. Guaranteed levels of logic high and logic low are set at 1.3V and 0.4V respectively. When EN is initially taken high, the device becomes enabled and all LED currents remain at 0mA. To place the device into zero current shutdown mode, the EN pin must be held low.
2 SDA is the I C serial data line. This is a bidirectional line allowing data to be written into and read from the four registers in the driver. Registers RegA/B/C set the LED current in each pair of channels, while RegEn sets the On/Off state independently of each channel.
GND is the ground reference for the charge pump. The pin must be connected to the ground plane on the PCB. C1+, C1- are connected to each side of the 1F ceramic bucket capacitor C1. C2+, C2- are connected to each side of the 1F ceramic bucket capacitor C2. LEDxx provide the internally regulated current to the six LED cathodes. These pins enter a high-impedance zero-current state whenever the device is placed in shutdown mode. In applications using less than six LEDs, the unused channels should be disabled through the RegEn register. TAB is the exposed pad underneath the package. For best thermal performance, the tab should be soldered to the PCB and connected to the ground plane.
SCL is the I2C serial clock input. VOUT is the charge pump output that is connected to the LED anodes. A small 1F ceramic bypass capacitor is required between the VOUT pin and ground near the device.
Doc. No. MD-5014 Rev. D
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(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3626
BLOCK DIAGRAM
1F C1C1+ C21F C2+
VIN CIN 1F
1x mode (LDO) 1.5x Charge Pump
VOUT COUT 1F
Mode Control EN 1MHz Oscillator LEDA1 LEDA2 LEDB1 Reference Voltage LEDB2 LEDC1 LEDC2 Current Setting DAC SDA SCL Serial Interface Registers GND 6 Current Sink Regulators
Figure 2. CAT3626 Functional Block Diagram
BASIC OPERATION
At power-up, the CAT3626 starts operating in 1x mode where the output will be approximately equal to the input supply voltage (less any internal voltage losses). If the output voltage is sufficient to regulate all LEDs currents the device remains in 1x operating mode. If the input voltage is insufficient or falls to a level where the regulated currents cannot be maintained, the device automatically switches (after a fixed time of 400s) into 1.5x mode. In 1.5x mode, the output is approximately equal to 1.5 times the input supply voltage (less any internal voltage losses). The above sequence is repeated each and every time the chip is either powered-up or taken out of shutdown (via EN pin), or the RegEn register is accessed by write cycle.
LED CURRENT SETTING
The LED current setting is programmed via the I2C serial interface and is stored in four 8-bit registers RegA, RegB, RegC and RegEn as follows: RegA stores the LED current for group A (LEDA1 and LEDA2 channels), RegB stores the LED current for group B (LEDB1 and LEDB2 channels), RegC stores the LED current for group C (LEDC1 and LEDC2 channels), RegEn selects the on/off state of each of the 6 LED channels. At each write access to RegEn, the driver automatically reconfigures to the mode (1x or 1.5x) that provides the highest efficiency.
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. MD-5014 Rev. D
CAT3626
Table 1. Register address and data configuration (1) Register name RegA RegB RegC RegEn Register Address 0 1 2 3 Bit 7 X X X X Bit 6 X X X X Bit 5 Bit 4 Bit pattern Bit 3 Bit 2 Bit 1 Bit 0
See Table 2 for values LEDC2 On = 1 Off = 0 LEDC1 On = 1 Off = 0 LEDB2 On = 1 Off = 0 LEDB1 On = 1 Off = 0 LEDA2 On = 1 Off = 0 LEDA1 On = 1 Off = 0
The table 2 lists the various LED currents with the associated RegA, RegB, and RegC register values. Table 2. LED Current Selection and Register Value(1)
LED current D7 (mA) 0.5 X 1.0 X 1.5 X 2.0 X 2.5 X 3.0 X 3.5 X 4.0 X 4.5 X 5.0 X 5.5 X 6.0 X 6.5 X 7.0 X 7.5 X 8.0 X 8.5 X 9.0 X 9.5 X 10.0 X 10.5 X 11.0 X 11.5 X 12.0 X 12.5 X 13.0 X 13.5 X 14.0 X 14.5 X 15.0 X 15.5 X 16.0 X D6 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X D5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Dec 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 LED current D7 (mA) 16.5 X 17.0 X 17.5 X 18.0 X 18.5 X 19.0 X 19.5 X 20.0 X 20.5 X 21.0 X 21.5 X 22.0 X 22.5 X 23.0 X 23.5 X 24.0 X 24.5 X 25.0 X 25.5 X 26.0 X 26.5 X 27.0 X 27.5 X 28.0 X 28.5 X 29.0 X 29.5 X 30.0 X 30.5 X 31.0 X 31.5 X 32.0 X D6 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X D5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Dec 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
Notes: (1) X = not used 1 = logic high 0 = logic low
Doc. No. MD-5014 Rev. D
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(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3626 I2C INTERFACE
The LED driver is interfaced through a 2-wire serial I2C-bus in order to control the state and the current in each of the six LED channels. The SDA and SCL lines comply with the I2C electrical specification and should be terminated with pull-up resistors. When the bus is not used, both lines are high. The device supports the maximum bus speed of 400kbit/s. The serial bit sequence is shown below for read and write operations into the registers. Read and write instructions are Read operation: S Slave address W A Register address A S Slave address R A Data A* P initiated by the master controller/CPU and acknowledged by the slave LED driver. The I2C address of the driver is internally fixed to the binary value 1100110. The protocol requires that the start bit and the device address are both repeated. For further details on the I2C protocol, please refer to the I2C-Bus Specification, document number 9398 393 40011, from Philips Semiconductors.
Write operation: S Slave address W A S: R, W: A: A*: P: Slave address: Register address: Data: Register address Start condition Read bit (1), Write bit (0) Acknowledge sent by the slave LED driver (SDA high) Not Acknowledge sent by the master microcontroller (SDA low) Stop condition Device address 7 bits (MSB first, slave address is 1100110). Device register address 8 bits Data to read or write 8 bits A Data A P
Write Instruction Sequence
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Doc. No. MD-5014 Rev. D
CAT3626
Write Instruction Example setting 20mA current in LEDB1 and LEDB2
I2C Bus Protocol
SDA
SCL START Condition
1-7 ADDRESS
8 R/W
9 ACK
1-7
8
9 ACK
1-7 DATA
8
9 ACK STOP Condition
ADDRESS
TYPICAL APPLICATION
The CAT3626 is ideal for driving RGB (red green blue) LEDs with common anode configuration. The individual LED currents associated with the red, green and blue LEDs are programmable independently through the I2C interface, allowing to generate an accurate color mixing. Dimming while maintaining the same color can be done by reprogramming the RegEn register on and off with the appropriate duty cycle (PWM mode).
RGB LED
1F 1F
VIN 3V to 5.5V CIN 1F
C1VIN
C1+
C2-
C2+ VOUT
RGB LED COUT Red Green Blue 1F
CAT3626
LEDA1 LEDA2 LEDB1 LEDB2 LEDC1 LEDC2 GND
ENABLE I2C Interface
EN SDA SCL
Doc. No. MD-5014 Rev. D
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(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
CAT3626 PACKAGE OUTLINE DRAWING
TQFN 16-Pad 4 x 4mm (HV4)
(1)(2)
D
A DETAIL A
E
E2
PIN#1 ID D2
PIN#1 INDEX AREA
A1 SIDE VIEW
TOP VIEW
BOTTOM VIEW
SYMBOL
MIN
NOM
MAX
b
e
A A1 A3 b D D2 E E2 e L
0.70 0.00 0.25 3.90 2.00 3.90 2.00 0.45
0.75 0.02 0.20 REF 0.30 4.00 - 4.00 - 0.65 BSC -
0.80 0.05 0.35 4.10 2.25 4.10 2.25 0.65
A1 FRONT VIEW A3 A L DETAIL A
For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf.
Notes: (1) All dimensions are in millimeters. (2) Complies with JEDEC standard MO-220.
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
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Doc. No. MD-5014 Rev. D
CAT3626 EXAMPLE OF ORDERING INFORMATION 1
Prefix CAT
Device # 3626
Suffix HV4 - G T2
Product Number 3626 Optional Company ID Package HV4: TQFN 4 x 4mm
Lead Finish G: NiPdAu Blank: Matte-Tin(4)
Tape & Reel T: Tape & Reel 2: 2,000/Reel
For Product Top Mark Codes, click here: http://www.catsemi.com/techsupport/producttopmark.asp
Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard lead finish is NiPdAu. (3) The device used in the above example is a CAT3626HV4-GT2 (TQFN, NiPdAu Plated Finish, Tape & Reel, 2,000/Reel). (4) For Matte-Tin package option, please contact your nearest Catalyst Semiconductor Sales office.
Doc. No. MD-5014 Rev. D
14
(c) Catalyst Semiconductor, Inc. Characteristics subject to change without notice
REVISION HISTORY
Date 20-Mar-06 19-Nov-07 07-Jan-08 30-May-08 Rev. A B C D Reason Initial Issue Added MD- to document number Update Ordering Information Update Package Outline Drawing Added Example of Ordering Information Add Extended Temperature Range Update Package Outline Drawing Add Top Mark Code Link
Copyrights, Trademarks and Patents (c) Catalyst Semiconductor, Inc. Trademarks and registered trademarks of Catalyst Semiconductor include each of the following: Adaptive AnalogTM, Beyond MemoryTM, DPPTM, EZDimTM, LDDTM, MiniPotTM, Quad-ModeTM and Quantum Charge ProgrammableTM Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES. Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale. Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical semiconductor applications and may not be complete.
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Document No: MD-5014 Revision: D Issue date: 05/30/08

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