MAX6964ATG+ Maxim Integrated Products, MAX6964ATG+ Datasheet
MAX6964ATG+
Specifications of MAX6964ATG+
Related parts for MAX6964ATG+
MAX6964ATG+ Summary of contents
Page 1
... Keypad Backlights LED Status Indication RGB LED Drivers Typical Application Circuit at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 17-Output LED Driver/GPO with ♦ 400kbps, 2-Wire Serial Interface, 5.5V Tolerant ♦ ...
Page 2
LED Driver/GPO with Intensity Control and Hot-Insertion Protection ABSOLUTE MAXIMUM RATINGS Voltage (with respect to GND) V+ .............................................................................-0.3V to +4V SCL, SDA, AD0, BLINK, RST ...................................-0.3V to +6V O0–O16 ....................................................................-0.3V to +8V DC Current O16 ...................................................55mA ...
Page 3
Intensity Control and Hot-Insertion Protection ELECTRICAL CHARACTERISTICS (continued) (Typical Operating Circuit 3.6V, T (Note 1) PARAMETER SYMBOL Output Low Voltage V O0–O16 Output Low-Voltage SDA V OLSDA PWM Clock Frequency f PWM TIMING CHARACTERISTICS (Typical Operating ...
Page 4
LED Driver/GPO with Intensity Control and Hot-Insertion Protection TIMING CHARACTERISTICS (continued) (Typical Operating Circuit 3.6V, T (Note 1) PARAMETER Capacitive Load for Each Bus Line RST Pulse Width Output Data Valid Note 1: All parameters ...
Page 5
Intensity Control and Hot-Insertion Protection (T = +25°C, unless otherwise noted.) A SCOPE SHOT OF OUTPUT PORTS MAX6964 toc07 MASTER INTENSITY SET TO 14/15 OUTPUT 1, 2V/div OUTPUT 1 INDIVIDUAL INTENSITY SET TO 1/16 OUTPUT 2, 2V/div OUTPUT 2 INDIVIDUAL ...
Page 6
LED Driver/GPO with Intensity Control and Hot-Insertion Protection Functional Overview The MAX6964 is a general-purpose output (GPO) peripheral that provides 17 output ports, O0–O16, con- 2 trolled through an I C-compatible serial interface. All outputs sink loads up to ...
Page 7
Intensity Control and Hot-Insertion Protection The MAX6964 includes 2 register bytes, which are available as general-user RAM (Table 2). These bytes are reset to the value 0xFF on power-up and when the RST input is taken low (Table 3). When ...
Page 8
LED Driver/GPO with Intensity Control and Hot-Insertion Protection Table 1. MAX6964 Address Map PIN AD0 A6 A5 SCL 1 SDA 1 GND Table 2. Register Address Map REGISTER Blink phase 0 outputs O7–O0 Blink phase 0 ...
Page 9
Intensity Control and Hot-Insertion Protection COMMAND BYTE IS STORED ON RECEIPT OF ACKNOWLEDGE FROM MAX6964 S SLAVE ADDRESS Figure 7. Command Byte Received HOW COMMAND BYTE AND DATA BYTE MAP INTO MAX6964's REGISTERS ACKNOWLEDGE FROM MAX6964 SLAVE ADDRESS S R/W ...
Page 10
LED Driver/GPO with Intensity Control and Hot-Insertion Protection ing the MAX6964’s command byte by performing a write (Figure 7). The master can now read n consecu- tive bytes from the MAX6964 with the first data byte being read from ...
Page 11
Intensity Control and Hot-Insertion Protection Table 3. Power-Up Configuration REGISTER FUNCTION POWER-UP CONDITION Blink phase 0 outputs O7–O0 Blink phase 0 outputs O15–O8 User RAM0 User RAM1 Blink phase 1 outputs O7–O0 Blink phase 1 outputs O15–O8 Master and global/O16 ...
Page 12
LED Driver/GPO with Intensity Control and Hot-Insertion Protection Table 4. Configuration Register (continued) REGISTER CONFIGURATION Write device configuration Read back device configuration Disable global intensity control—intensity is set by registers 0x10–0x17 for ports O0 through O15 when configured as ...
Page 13
Intensity Control and Hot-Insertion Protection Table 6. Blink Phase 0 Registers REGISTER Write outputs O7–O0 phase 0 Read back outputs O7–O0 phase 0 Write outputs O15–O8 phase 0 Read back outputs O15–O8 phase 0 Table 7. Blink Phase 1 Registers ...
Page 14
LED Driver/GPO with Intensity Control and Hot-Insertion Protection PWM Intensity Control The MAX6964 includes an internal oscillator, nominally 32kHz, to generate PWM timing for LED intensity control or other applications such as PWM trim DACs. PWM can be disabled ...
Page 15
Intensity Control and Hot-Insertion Protection enabled with the global intensity flag G in the configu- ration register (Table 4). When global PWM control is used, the 4 bits of master intensity and 4 bits of global intensity effectively combine to ...
Page 16
LED Driver/GPO with Intensity Control and Hot-Insertion Protection For example, to operate a 2.2V red LED at 14mA from a 5V supply 2.2 - 0.25) / 0.014 = 182Ω. LED Driving Load Currents Higher than ...
Page 17
Intensity Control and Hot-Insertion Protection Table 10. PWM Intensity Settings (Blink Enabled) PWM DUTY CYCLE OUTPUT OUTPUT BLINK (OR PHASE X GLOBAL) REGISTER BIT = 0 INTENSITY SETTING LOW HIGH TIME TIME 0x0 1/16 15/16 0x1 2/16 14/16 0x2 3/16 ...
Page 18
LED Driver/GPO with Intensity Control and Hot-Insertion Protection Table 11. Master, O16 Intensity Register REGISTER MASTER AND GLOBAL INTENSITY Write master and global intensity Read back master and global intensity Master intensity duty cycle is 0/15 (off); internal oscillator ...
Page 19
Intensity Control and Hot-Insertion Protection Table 12. Output Intensity Registers REGISTER OUTPUTS O1, O0 INTENSITY Write output O1, O0 intensity Read back output O1, O0 intensity Output O1 intensity duty cycle is 1/16 Output O1 intensity duty cycle is 2/16 ...
Page 20
LED Driver/GPO with Intensity Control and Hot-Insertion Protection Table 12. Output Intensity Registers (continued) REGISTER OUTPUTS O9, O8 INTENSITY Write output O9, O8 intensity Read back output O9, O8 intensity OUTPUTS O11, O10 INTENSITY Write output O11, O10 intensity ...
Page 21
Intensity Control and Hot-Insertion Protection 3.3V 0.047µF V+ µC SDA SDA SCL SCL I/O BLINK I/O RST MAX6964 AD0 GND Pin Configurations (continued) TOP VIEW O16 1 24 RST 2 23 ADO MAX6964AEG O1 5 ...
Page 22
LED Driver/GPO with Intensity Control and Hot-Insertion Protection (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 22 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, QSOP .150", ...
Page 23
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23 © 2005 Maxim Integrated Products ...