TCA6507_10 Datasheet, PDF (1/32 Pages) Texas Instruments – LOW-VOLTAGE 7-BIT I2C AND SMBus LED DRIVER WITH INTENSITY CONTROL AND SHUTDOWN

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TCA6507
LOW-VOLTAGE 7-BIT I²C AND SMBus LED DRIVER
WITH INTENSITY CONTROL AND SHUTDOWN
SCPS164B – MAY 2007 – REVISED NOVEMBER 2007
FEATURES
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• Seven LED Driver Outputs: On, Off, Blinking,
Fading at Programmable Rates
• Open-Drain Outputs Directly Drive LEDs to
40 mA Max
• Can Be Configured Into Two Independent
Banks of LED Drivers
• Widely Programmable Blink Rates, Fade-On
and Fade-Off Rates and Maximum Intensity
• LED Intensity Set Using Pulse Width
Modulation (PWM)
• Outputs Not Used as LED Drivers Can Be
Used as Regular General-Purpose Open-Drain
Outputs
• 16 Steps of Maximum Intensity Control from
Fully-Off to Fully-On States
• 256 Intensity Levels During Fade-On or
Fade-Off for Smooth Perceived Transition
• Operating Power-Supply Voltage Range of
1.65 V to 3.6 V
• EVM Available
• Schmitt-Trigger Action Allows Slow Input
Transition and Better Switching Noise
Immunity at the Inputs
– V_hys = 0.18 V Typ at 1.8 V
– V_hys = 0.25 V Typ at 2.5 V
– V_hys = 0.33 V Typ at 3.3 V
• 5.5-V Tolerant Open-Drain Outputs
• Low Standby Current with Shutdown
Capability for Additional Power Savings
• Internal Power-On Reset
• Internal Oscillator Requires No External
Components
• Programmed Through I²C Bus Interface Logic
Compatible With SMBus
• 400-kHz Fast I²C Bus
• Noise Filter on SCL/SDA Inputs
• No Glitch on Power Up
• Supports Hot Insertion
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
V_CC
SCL
SDA
EN
GND
NC
NC
PW PACKAGE
(TOP VIEW)
1
14
2
13
3
12
4
11
5
10
6
9
7
8
ZXU PACKAGE
(TOP VIEW)
CBA
P6
P5
1
P4
P3
2
P2
3
P1
P0
4
RUE PACKAGE
(TOP VIEW)
P6
V_{CC 1} 12 _{11 P5}
SCL 2
10 P4
SDA 3
9 P3
EN 4
8 P2
GND 5 ⁶ 7 P1
P0
NC – No internal connection
DESCRIPTION/ORDERING INFORMATION
This 7-bit LED dimmer for the two-line bidirectional bus (I²C) is designed to control (or dim) LEDs via the I²C
interface [serial clock (SCL), serial data (SDA)]. Without this device, the microprocessor or microcontroller must
be actively involved in turning on and off the LEDs (per the required dimming rate), which uses valuable
processor time and the overloads I²C bus. The TCA6507 alleviates this issue by limiting the number of
operations required by the processor in blinking LEDs and, thus, helps to create a more efficient system.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated