MAX7360ETL+ Maxim Integrated Products, MAX7360ETL+ Datasheet

MAX7360ETL+

Manufacturer Part Number

MAX7360ETL+

Description

IC CTRLR KEY-SW I2C 40TQFN-EP

Manufacturer

Maxim Integrated Products

Type

Controllerr

Datasheet

1.MAX7360EWXT.pdf (32 pages)

Specifications of MAX7360ETL+

Input Type

Logic

Output Type

Logic

Interface

I²C

Current - Supply

50µA

Mounting Type

Surface Mount

Package / Case

40-TQFN Exposed Pad

Operating Supply Voltage

3.3 V

Maximum Operating Temperature

+ 85 C

Mounting Style

SMD/SMT

Minimum Operating Temperature

- 40 C

Supply Current

34 uA

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 32
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The MAX7360 I

processors with management of up to 64 key switches,

with an additional eight LED drivers/GPIOs that feature

constant-current, PWM intensity control, and rotary

switch control options.

The key-switch drivers interface with metallic or resis-

tive switches with on-resistances up to 5kI. Key inputs

are monitored statically, not dynamically, to ensure

low-EMI operation. The MAX7360 features autosleep

and autowake modes to further minimize the power

consumption of the device. The autosleep feature puts

the device in a low-power state (1FA typ) after a sleep

timeout period. The autowake feature configures the

MAX7360 to return to normal operating mode from sleep

upon a keypress.

The key controller debounces and maintains a FIFO of

keypress and release events (including autorepeat, if

enabled). An interrupt (INTK) output can be configured

to alert keypresses, as they occur, or at maximum rate.

There are eight open-drain I/O ports, which can be used

to drive LEDs. The maximum constant-current level for

each open-drain port is 20mA. The intensity of the LED

on each open-drain port can be individually adjusted

through a 256-step PWM control. An input port pair

(PORT6, PORT7) can be configured to accept 2-bit gray

code inputs from a rotary switch. In addition, if not used

for key-switch control, up to six column pins can be used

as general-purpose open-drain outputs (GPOs) for LED

drive or logic control.

The MAX7360 is offered in a 40-pin (5mm x 5mm)

thin QFN package with an exposed pad, and a small

36-bump wafer level package (WLP) for cell phones,

pocket PCs, and other portable consumer electronic

applications. The MAX7360 operates over the -40NC to

+85NC extended temperature range.

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.

19-4566; Rev 1; 8/10

Cell Phones

PDAs

Handheld Games

Portable Consumer Electronics

Printers

Instrumentation

Driver/GPIOs with Integrated ESD Protection

C-Interfaced Key-Switch Controller and LED

C-interfaced peripheral provides micro-

_______________________________________________________________ Maxim Integrated Products 1

General Description

Applications

S Integrated ESD Protection

S +14V Tolerant, Open-Drain I/O Ports Capable of

S Rotary Switch-Capable Input Pair (PORT6, PORT7)

S 256-Step PWM Individual LED Intensity Control

S Individual LED Blink Rates and Common LED

S FIFO Queues Up to 16 Debounced Key Events

S User-Configurable Key Debounce (9ms to 40ms)

S Keyscan Uses Static Matrix Monitoring for Low

S +1.62V to +3.6V Operation

S Monitors Up to 64 Keys

S Key-Switch Interrupt (INTK) on Each Debounced

S Port Interrupt (INTI) for Input Ports for Special-Key

S 400kbps, +5.5V Tolerant 2-Wire Serial Interface

S Four I

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Pin Configurations appear at end of data sheet.

MAX7360ETL+

MAX7360EWX+

Constant-Current LED Drive

Fade In/Out Rates from 256ms to 4096ms

EMI Operation

Event/FIFO Level, or End of Definable Time Period

Functions

with Selectable Bus Timeout

±8kV IEC 61000-4-2 Contact Discharge

±15kV IEC 61000-4-2 Air-Gap Discharge

PART

C Address Choices

SCL

SDA

INTI

INTK

AD0

Simplfied Block Diagram

MAX7360

-40°C to +85°C

TEMP RANGE

+1.8V

Ordering Information

ROW_(8x)

COL_(8x)

PORT7

PORT6

PORT0

PIN-PACKAGE

40 TQFN-EP*

36 WLP

ROTARY

SWITCH

Features

8 x 8

+14V

Related parts for MAX7360ETL+

MAX7360ETL+ Summary of contents

Page 1

... S Port Interrupt (INTI) for Input Ports for Special-Key Functions S 400kbps, +5.5V Tolerant 2-Wire Serial Interface with Selectable Bus Timeout 2 S Four I C Address Choices Ordering Information PART TEMP RANGE MAX7360ETL+ -40°C to +85°C MAX7360EWX+ -40°C to +85°C +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Simplfied Block Diagram +1.8V TO SCL ...

Page 2

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection ABSOLUTE MAXIMUM RATINGS V to GND ............................................................. -0.3V to +4V CC COL0–COL7, ROW0–ROW7 to GND ...................... -0.3V to +4V SDA, SCL, AD0, INTI, INTK to GND ........................ -0.3V ...

Page 3

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection ELECTRICAL CHARACTERISTICS (continued +1.62V to +3.6V -40NC to +85NC, unless otherwise noted. Typical values are PARAMETER SYMBOL GPIO SPECIFICATIONS Input ...

Page 4

Page 5

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection (V = +2.5V + unless otherwise noted GPO OUTPUT LOW VOLTAGE vs. SINK CURRENT (COL2–COL7) 250 ...

Page 6

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection PIN NAME TQFN WLP 1 A6 ROW0 2 B6 ROW1 3 C4 ROW2 4 C6 ROW3 5, 15, 25, B4, C5, D2, GND ROW4 ...

Page 7

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection PIN NAME TQFN WLP 24 D1 INTI Active-Low GPI Interrupt Output. INTI is open drain and requires a pullup resistor Positive Supply Voltage. Bypass V ...

Page 8

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection MAX7360 INTI INTK SDA 2 SCL I C INTERFACE AD0 BUS TIMEOUT *GPO Detailed Description The MAX7360 is a microprocessor peripheral low-noise key-switch controller that monitors up to ...

Page 9

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 1. Register Address Map and Power-Up Condition ADDRESS READ/ POWER-UP CODE WRITE VALUE (hex) (hex) 0x00 Read only 0x3F 0x01 0x0A R/W 0x02 0xFF R/W 0x03 0x00 ...

Page 10

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 2. Key-Switch Mapping PIN COL0 COL1 KEY 0 KEY 8 ROW0 ROW1 KEY 1 KEY 9 ROW2 KEY 2 KEY 10 KEY 3 KEY 11 ROW3 ROW4 ...

Page 11

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection The settings in this register are ignored for ports not con- figured as GPOs, and a read from this register returns the values stored in the register (see ...

Page 12

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection GPIO Constant-Current Setting Register (0x43) The GPIO constant-current setting register sets the global constant-current amount (see Table 17 in the Register Tables section). Bits D1 and D0 set ...

Page 13

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection in automatically cancels that port’s fade and immedi- ately output at its newly programmed intensity. 4) Put the part into shutdown to cause all ports to fade out. ...

Page 14

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection is required on SDA. The MAX7360’s SCL line operates only as an input. A pullup resistor is required on SCL if there are multiple masters on the 2-wire ...

Page 15

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection CONDITION SCL SDA BY TRANSMITTER SDA BY RECEIVER Figure 5. Acknowledge 0 SDA MSB SCL Figure 6. Slave Address COMMAND BYTE IS STORED ON RECEIPT OF ACKNOWLEDGE FROM ...

Page 16

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection ACKNOWLEDGE FROM MAX7360 S SLAVE ADDRESS R/W Figure 9. N Data Bytes Received Table 4. Autoincrement Rules REGISTER ADDRESS FUNCTION CODE (hex) Keys FIFO 0x00 Autoshutdown 0x06 All ...

Page 17

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection REGULAR KEYPRESS EVENT KEY-SWITCH MATRIX Figure 10. Ghost-Key Phenomenon Ghost-Key Elimination Ghost keys are a phenomenon inherent with key-switch matrices. When three switches located at the corners of ...

Page 18

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection All of the MAX7360 pins meet the 2kV Human Body Model ESD tolerances. Key-switch inputs and GPIOs meet IEC 61000-4-2 ESD protection. The IEC test stresses consist of ...

Page 19

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 7. Keys FIFO Register Format (0x00) SPECIAL FUNCTION The key number indicated by D5: key event always for a key press of key ...

Page 20

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 8. Configuration Register Format (0x01) REGISTER DESCRIPTION VALUE BIT (when 0x40 Sleep (when 0x40 (when 0x40 ...

Page 21

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 9. Debounce Register Format (0x02) (continued) REGISTER DESCRIPTION GPO ports 7, 6, and 5 enabled GPO ports and 4 enabled GPO ports 7, 6, ...

Page 22

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 11. Ports Register Format (0x04) REGISTER DESCRIPTION VALUE BIT D7 PORT 7 Control D6 PORT 6 Control D5 PORT 5 Control D4 PORT 4 Control D3 PORT ...

Page 23

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 12. Autorepeat Register Format (0x05) REGISTER DESCRIPTION Autorepeat is disabled Autorepeat is enabled Key-switch autorepeat delay is 8 debounce cycles Key-switch autorepeat delay is 16 debounce cycles ...

Page 24

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 13. Autosleep Register Format (0x06) REGISTER AUTOSLEEP REGISTER No Autosleep Autosleep for (ms) 8192 4096 2048 1024 512 256 256 Power-up default settings Table 14. GPIO Global ...

Page 25

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 15. GPIO Control Register (0x41) REGISTER DESCRIPTION VALUE BIT D7 PORT7 D6 PORT6 D5 PORT5 D4 PORT4 D3 PORT3 D2 PORT2 D1 PORT1 D0 PORT0 Table 16. ...

Page 26

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 17. GPIO Constant-Current Setting Register (0x43) REGISTER DESCRIPTION VALUE BIT D[7:6] Reserved D[5:2] Reserved 0000 Constant- D[1:0] current setting Table 18. GPIO Output Mode Register (0x44) REGISTER ...

Page 27

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 19. Common PWM Register (0x45) (continued) REGISTER DESCRIPTION Common PWM ratio is 252/256 Common PWM ratio is 253/256 Common PWM ratio is 254/256 Common PWM ratio is ...

Page 28

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 21 Timeout Flag Register (0x48) (Read Only) REGISTER DESCRIPTION VALUE BIT D[7:1] Reserved 0000000 timeout flag 2 Table 22. GPIO Input ...

Page 29

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Table 24. PORT0–PORT7 Individual PWM Ratio Registers (0x50 to 0x57) REGISTER DESCRIPTION Power-up default setting (port PWM ratio is 0/256) PORT PWM ratio is 1/256 PORT PWM ratio ...

Page 30

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection TOP VIEW BUMPS IN BOTTOM TOP VIEW PORT0 PORT1 PORT2 PORT3 GND PORT4 PORT5 PORT6 PORT7 N.C. 30 _____________________________________________________________________________________ MAX7360 I.C. PORT1 PORT3 PORT4 PORT6 ...

Page 31

I 2 C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection +14V +14V +3. SDA SCL µC INTI INTK GND Chip Information PROCESS: BiCMOS ______________________________________________________________________________________ +3.3V +1.8V V COL7 CC COL6 PORT0 COL5 PORT1 COL4 MAX7360 PORT2 ...

Page 32

... 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. 32 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2010 Maxim Integrated Products © ...

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