MAX6956AAI+ Maxim Integrated Products, MAX6956AAI+ Datasheet

IC DRIVER LED PORT 20/28 28-SSOP

MAX6956AAI+

Manufacturer Part Number
MAX6956AAI+
Description
IC DRIVER LED PORT 20/28 28-SSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX6956AAI+

Display Type
LED
Interface
I²C
Current - Supply
180µA
Voltage - Supply
2.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
28-SSOP
Number Of Digits
7
Number Of Segments
28
Low Level Output Current
18000 uA
Operating Supply Voltage
2.5 V to 5.5 V
Maximum Supply Current
230 uA
Maximum Power Dissipation
762 mW
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Configuration
-
Digits Or Characters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX6956 compact, serial-interfaced LED display
driver/I/O expander provide microprocessors with up to
28 ports. Each port is individually user configurable to
either a logic input, logic output, or common-anode
(CA) LED constant-current segment driver. Each port
configured as an LED segment driver behaves as a
digitally controlled constant-current sink, with 16 equal
current steps from 1.5mA to 24mA. The LED drivers are
suitable for both discrete LEDs and CA numeric and
alphanumeric LED digits.
Each port configured as a general-purpose I/O (GPIO)
can be either a push-pull logic output capable of sink-
ing 10mA and sourcing 4.5mA, or a Schmitt logic input
with optional internal pullup. Seven ports feature config-
urable transition detection logic, which generates an
interrupt upon change of port logic level. The MAX6956
is controlled through an I
interface, and uses four-level logic to allow 16 I
addresses from only 2 select pins.
The MAX6956AAX and MAX6956ATL have 28 ports
and are available in 36-pin SSOP and 40-pin thin QFN
packages, respectively. The MAX6956AAI and
MAX6956ANI have 20 ports and are available in 28-pin
SSOP and 28-pin DIP packages, respectively.
For an SPI-interfaced version, refer to the MAX6957
data sheet. For a lower cost pin-compatible port
expander without the constant-current LED drive capa-
bility, refer to the MAX7300 data sheet.
19-2414; Rev 4; 6/10
Typical Operating Circuit appears at end of data sheet.
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.
Set-Top Boxes
Panel Meters
White Goods
Automotive
28-Port LED Display Driver and I/O Expander
2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or
________________________________________________________________ Maxim Integrated Products
General Description
2
C-compatible 2-wire serial
Bar Graph Displays
Industrial Controllers
System Monitoring
Applications
2
C
o 400kbps I
o 2.5V to 5.5V Operation
o -40°C to +125°C Temperature Range
o 20 or 28 I/O Ports, Each Configurable as
o 11µA (max) Shutdown Current
o 16-Step Individually Programmable Current
o Logic Transition Detection for Seven I/O Ports
/V denotes an automotive qualified part.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
* EP = Exposed pad.
Pin Configurations continued at end of data sheet.
MAX6956ANI+
MAX6956AAI+
MAX6956AAX+
MAX6956ATL+
MAX6956AAX/V
MAX6956AAX/V+T
Control for Each LED
Constant-Current LED Driver
Push-Pull Logic Output
Schmitt Logic Input
Schmitt Logic Input with Internal Pullup
PART
TOP VIEW
2
C-Compatible Serial Interface
ISET
GND
GND
AD0
P12
P13
P14
P15
P16
P17
P18
P19
P20
P21
10
11
12
13
14
1
2
3
4
5
6
7
8
9
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
Ordering Information
SSOP/DIP
MAX6956
Pin Configurations
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V+
AD1
SCL
SDA
P31
P30
P29
P28
P27
P26
P25
P24
P23
P22
28 DIP
28 SSOP
36 SSOP
36 SSOP
36 SSOP
PIN-PACKAGE
40 Thin QFN-EP*
Features
1

Related parts for MAX6956AAI+

MAX6956AAI+ Summary of contents

Page 1

... Schmitt Logic Input with Internal Pullup o 11µA (max) Shutdown Current o 16-Step Individually Programmable Current Control for Each LED o Logic Transition Detection for Seven I/O Ports PART MAX6956ANI MAX6956AAI+ MAX6956AAX+ MAX6956ATL+ MAX6956AAX/V MAX6956AAX/V+T /V denotes an automotive qualified part. + Denotes a lead(Pb)-free/RoHS-compliant package Tape and reel Exposed pad. ...

Page 2

LED Display Driver and I/O Expander ABSOLUTE MAXIMUM RATINGS Voltage (with Respect to GND) V+ .............................................................................-0.3V to +6V SCL, SDA, AD0, AD1................................................-0.3V to +6V All Other Pins................................................-0.3V to (V+ + 0.3V) P4–P31 Current ...

Page 3

LED Display Driver and I/O Expander ELECTRICAL CHARACTERISTICS (continued) ( Typical Operating Circuit , V+ = 2.5V to 5.5V, T PARAMETER SYMBOL Port Drive LED Sink Current, I Port Configured as LED Driver ...

Page 4

LED Display Driver and I/O Expander __________________________________________Typical Operating Characteristics (R = 39kΩ +25°C, unless otherwise noted.) ISET A OPERATING SUPPLY CURRENT vs. TEMPERATURE 0. 2.5V TO 5.5V 0.36 NO ...

Page 5

LED Display Driver and I/O Expander PIN SSO P/D IP SSOP 37, 38 5–24 — — 1–10, 12–19, ...

Page 6

LED Display Driver and I/O Expander Table 1. Port Configuration Map REGISTER Port Configuration for P7, P6, P5, P4 Port Configuration for P11, P10, P9, P8 Port Configuration for P15, P14, P13, P12 ...

Page 7

LED Display Driver and I/O Expander P4 TO P31 LED DRIVERS AND GPIO LED DRIVERS OR GPIO SEGMENT OR GPIO DATA 8 AD0 ADDRESS MATCHER AD1 7-BIT DEVICE ...

Page 8

LED Display Driver and I/O Expander SDA t SU, DAT t LOW SCL t HIGH t HD, STA t R START CONDITION Figure 2. 2-Wire Serial Interface Timing Details SDA S SCL START ...

Page 9

LED Display Driver and I/O Expander START CONDITION SCL SDA BY TRANSMITTER S SDA BY RECEIVER Figure 5. Acknowledge SDA 1 0 MSB SCL Figure 6. Slave Address MAX6956 is the recipient. When ...

Page 10

LED Display Driver and I/O Expander 7-SEGMENT DIGIT 1 VIRTUAL SEGMENTS P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 P21 ...

Page 11

LED Display Driver and I/O Expander HOW COMMAND BYTE AND DATA BYTE MAP INTO MAX6956's REGISTER ACKNOWLEDGE FROM MAX6956 S SLAVE ADDRESS Figure 10. n Data Bytes Received Table 3. MAX6956 Address Map ...

Page 12

LED Display Driver and I/O Expander Table 5. Register Address Map REGISTER No-Op Global Current Configuration Transition Detect Mask Display Test Port Configuration P7, P6, P5, P4 Port Configuration P11, P10, P9, P8 ...

Page 13

LED Display Driver and I/O Expander Table 5. Register Address Map (continued) REGISTER Port 11 only (data bit D0; D7–D1 read as 0) Port 12 only (data bit D0; D7–D1 read as 0) ...

Page 14

LED Display Driver and I/O Expander Table 5. Register Address Map (continued) REGISTER 8 ports 16–23 (data bits D0–D7) 8 ports 17–24 (data bits D0–D7) 8 ports 18–25 (data bits D0–D7) 8 ports ...

Page 15

LED Display Driver and I/O Expander Table 6. Power-Up Configuration REGISTER POWER-UP CONDITION FUNCTION Port Register LED Off; GPIO Output Low Bits Global 1/16 (minimum on) Current Shutdown Enabled Configuration ...

Page 16

LED Display Driver and I/O Expander Table 7. Configuration Register Format ADDRESS CODE FUNCTION (HEX) Configuration Register 0x04 Table 8. Shutdown Control (S Data Bit D0) Format ADDRESS CODE FUNCTION (HEX) Shutdown 0x04 ...

Page 17

LED Display Driver and I/O Expander Table 11. Global Segment Current Register Format LED DRIVE TYPICAL SEGMENT FRACTION CURRENT (mA) 1/16 1.5 2/16 3 3/16 4.5 4/16 6 5/16 7.5 6/16 9 7/16 ...

Page 18

LED Display Driver and I/O Expander Table 12. Individual Segment Current Registers REGISTER ADDRESS FUNCTION CODE (HEX) Current054 register 0x12 Current076 register 0x13 Current098 register 0x14 Current0BA register 0x15 Current0DC register 0x16 Current0FE ...

Page 19

LED Display Driver and I/O Expander Table 14. Odd Individual Segment Current Format SEGMENT LED CONSTANT DRIVE CURRENT WITH FRACTION R = 39kΩ (mA) ISET 1/16 1.5 2/16 3 3/16 4.5 4/16 6 ...

Page 20

LED Display Driver and I/O Expander P31 GPIO INPUT CONDITIONING P30 GPIO/PORT OUTPUT LATCH GPIO INPUT CONDITIONING P29 GPIO/PORT OUTPUT LATCH GPIO INPUT CONDITIONING P28 GPIO/PORT OUTPUT LATCH GPIO INPUT CONDITIONING P27 GPIO/PORT ...

Page 21

LED Display Driver and I/O Expander Table 15. Transition Detection Mask Register REGISTER READ/ FUNCTION ADDRESS WRITE (HEX) Read Mask 0x06 Register Write * INT is automatically cleared after it is read. Table ...

Page 22

LED Display Driver and I/O Expander 3V 47nF DATA CLOCK 3V 47nF IRQ OUT SW1 SW2 SW3 22 ______________________________________________________________________________________ GND P6 ...

Page 23

LED Display Driver and I/O Expander TOP VIEW ISET 1 GND 2 GND 3 AD0 MAX6956 P12 P13 8 P10 9 P14 10 P11 11 P15 12 ...

Page 24

... 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. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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