MAX7314ATG Maxim Integrated Products, MAX7314ATG Datasheet

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MAX7314ATG

Manufacturer Part Number
MAX7314ATG
Description
Communication ICs - Various
Manufacturer
Maxim Integrated Products
Type
Hot Insertion Protectionr
Datasheet

Specifications of MAX7314ATG

Mounting Style
SMD/SMT
Operating Supply Voltage
2.5 V, 3.3 V
Supply Type
Analog
Package / Case
TQFN-24 EP
Data Rate
400 Kbps
Supply Voltage (max)
3.6 V
Supply Voltage (min)
2 V
Supply Current
0.057 mA
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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The MAX7314 I
eral provides microprocessors with 16 I/O ports plus one
output-only port and one input-only port. Each I/O port
can be individually configured as either an open-drain
current-sinking output rated at 50mA and 5.5V, or a logic
input with transition detection. The output-only port can
be assigned as an interrupt output for transition detec-
tion. The outputs are capable of driving LEDs, or provid-
ing logic outputs with external resistive pullup up to 5.5V.
Eight-bit PWM current control is built in for all 17 output
ports. A 4-bit global control applies to all LED outputs
and provides coarse adjustment of current from fully off
to fully on with 14 intensity steps in between. Each out-
put has an individual 4-bit control, which further divides
the globally set current into 16 more steps.
Alternatively, the current control can be configured as a
single 8-bit control that sets all outputs at once.
Each output has independent blink timing with two blink
phases. All LEDs can be individually set to be on or off
during either blink phase, or to ignore the blink control.
The blink period is controlled by a clock input (up to 1kHz)
on BLINK or by a register. The BLINK input can also be
used as a logic control to turn the LEDs on and off, or as a
general-purpose input.
The MAX7314 supports hot insertion. All port pins, the
INT output, SDA, SCL, RST, BLINK, and the slave
address input ADO remain high impedance in power-
down (V+ = 0V) with up to 6V asserted upon them.
The MAX7314 is controlled through a 2-wire serial inter-
face, and uses four-level logic to allow four I
addresses from only one select pin.
19-3170; Rev 4; 4/05
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.
Pin Configurations continued at end of data sheet.
LCD Backlights
LED Status Indication
Relay Drivers
Keypad Backlights
RGB LED Drivers
System I/O Ports
2
C-compatible serial interfaced periph-
18-Port GPIO with LED Intensity Control,
________________________________________________________________ Maxim Integrated Products
Interrupt, and Hot-Insertion Protection
General Description
Applications
2
C
♦ 400kbps, 2-Wire Serial Interface, 5.5V Tolerant
♦ 2V to 3.6V Operation
♦ Overall 8-Bit PWM LED Intensity Control
♦ 2-Phase LED Blinking
♦ 50mA Maximum Port Output Current
♦ Supports Hot Insertion
♦ Outputs are 5.5V-Rated Open Drain
♦ Inputs are Overvoltage Protected to 5.5V
♦ Transition Detection with Interrupt Output
♦ 1.2µA (typ), 3.6µA (max) Operating Current
♦ Small 4mm x 4mm, Thin QFN Package
♦ -40°C to +125°C Temperature Range
MAX7314ATG
MAX7314AEG
PART
μC
0.047μF
SDA
SCL
Global 16-Step Intensity Control
Individual 16-Step Intensity Controls
INT
I/O
I/O
SDA
SCL
BLINK
RST
INT/O16
AD0
3.3V
V+
Typical Application Circuit
MAX7314
-40°C to +125°C
-40°C to +125°C 24 QSOP
TEMP RANGE
GND
P10
P11
P12
P13
P14
P15
P0
P1
P2
P3
P4
P5
P6
P7
P8
P9
Ordering Information
5V
3.3V
PIN-
PACKAGE
24 Thin QFN
4mm x 4mm
x 0.8mm
5V
OUTPUT
OUTPUT
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
Features
PKG
CODE
T2444-4
1

Related parts for MAX7314ATG

MAX7314ATG Summary of contents

Page 1

... Inputs are Overvoltage Protected to 5.5V ♦ Transition Detection with Interrupt Output ♦ 1.2µA (typ), 3.6µA (max) Operating Current ♦ Small 4mm x 4mm, Thin QFN Package ♦ -40°C to +125°C Temperature Range PART MAX7314ATG MAX7314AEG 2 C Applications 0.047μF μ ...

Page 2

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection ABSOLUTE MAXIMUM RATINGS Voltage (with respect to GND) V+ .............................................................................-0.3V to +4V SCL, SDA, AD0, BLINK, RST, P0–P15 .....................-0.3V to +6V INT/O16 ...................................................................-0.3V to +8V DC Current on P0–P15, INT/O16 ...

Page 3

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection ELECTRICAL CHARACTERISTICS (continued) (Typical Operating Circuit 3.6V, T (Note 1) PARAMETER SYMBOL Output Low Voltage V P0–P15, INT/O16 Output Low-Voltage SDA V OLSDA PWM Clock Frequency ...

Page 4

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection TIMING CHARACTERISTICS (continued) (Typical Operating Circuit 3.6V, T (Note 1) PARAMETER Interrupt Valid Interrupt Reset Output Data Valid Input Data Set-Up Time Input Data Hold Time ...

Page 5

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection (T = +25°C, unless otherwise noted.) A PORT OUTPUT LOW VOLTAGE WITH 50mA LOAD CURRENT vs. TEMPERATURE 0.6 0 2. 3.6V ...

Page 6

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection PIN QSOP QFN 4–11, 13–20 1–8, 10– — PAD DATA FROM SHIFT REGISTER DATA ...

Page 7

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Port Inputs and Transition Detection Input ports registers reflect the incoming logic levels of the port pins, regardless of whether the pin is defined as an input or an output. ...

Page 8

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Serial Interface Serial Addressing The MAX7314 operates as a slave that sends and 2 receives data through an I C-compatible 2-wire inter- face. The interface uses a serial data line ...

Page 9

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection The second (A5), third (A4), fourth (A3), sixth (A1), and last (A0) bits of the MAX7314 slave address are always and 0. Slave address bits A6 ...

Page 10

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection WRITE TO OUTPUT PORTS REGISTERS (BLINK PHASE 0 REGISTERS/BLINK PHASE 1 REGISTERS) SCL SLAVE ADDRESS SDA ...

Page 11

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 2. Register Address Map REGISTER Read input ports P7–P0 Read input ports P15–P8 Blink phase 0 outputs P7–P0 Blink phase 0 outputs P15–P8 Ports configuration P7–P0 Ports configuration P15–P8 ...

Page 12

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 3. Power-Up Configuration REGISTER FUNCTION POWER-UP CONDITION Blink phase 0 outputs P7–P0 High-impedance outputs Blink phase 0 outputs P15–P8 High-impedance outputs Ports configuration P7–P0 Ports P7–P0 are inputs Ports ...

Page 13

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 4. Configuration Register REGISTER CONFIGURATION Write device configuration Read back device configuration Disable blink Enable blink Flip blink register (see text) Disable global intensity control—intensity is set by registers ...

Page 14

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 4. Configuration Register (continued) REGISTER CONFIGURATION Write device configuration Read back device configuration Read back BLINK input pin status— input is low Read back BLINK input pin status— input ...

Page 15

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 5. Ports Configuration Registers REGISTER Ports configuration P7– input output) Read back ports configuration P7–P0 Ports configuration P15– input output) Read ...

Page 16

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 8. Blink Phase 0 Registers REGISTER Write outputs P7–P0 phase 0 Read back outputs P7–P0 phase 0 Write outputs P15–P8 phase 0 Read back outputs P15–P8 phase 0 Table ...

Page 17

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 10. PWM Application Scenarios APPLICATION All outputs static without PWM A mix of static and PWM outputs, with PWM outputs using different PWM settings A mix of static and ...

Page 18

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection MASTER INTENSITY TIMESLOT Figure 16. Individual (or Global) Set to 1/16 MASTER INTENSITY TIMESLOT ...

Page 19

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 12. 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 ...

Page 20

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 13. 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 ...

Page 21

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 14. Output Intensity Registers REGISTER OUTPUTS P1, P0 INTENSITY Write output P1, P0 intensity Read back output P1, P0 intensity Output P1 intensity duty cycle is 1/16 Output P1 ...

Page 22

GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection Table 14. Output Intensity Registers (continued) REGISTER OUTPUTS P9, P8 INTENSITY Write output P9, P8 intensity Read back output P9, P8 intensity OUTPUTS P11, P10 INTENSITY Write output P11, P10 ...

Page 23

... GPIO with LED Intensity Control, Interrupt, and Hot-Insertion Protection TOP VIEW SCL SDA MAX7314ATG INT/O16 22 RST 23 AD0 THIN QFN 2V TO 3.6V 0.047μ μC P1 SDA SDA MAX7314 P2 SCL SCL P3 I/O BLINK P4 I/O RST P5 INT INT/O16 AD0 P9 P10 P11 P12 P13 ...

Page 24

GPIO with LED Intensity Control, Interrupt, 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.) 24 ______________________________________________________________________________________ Package Information ...

Page 25

... 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 ____________________ 25 © 2005 Maxim Integrated Products ...

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