MAX7301AAX-T Maxim Integrated, MAX7301AAX-T Datasheet

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MAX7301AAX-T

Manufacturer Part Number
MAX7301AAX-T
Description
Interface - I/O Expanders 2.5-5.5V 20/28 Port I/O Expander
Manufacturer
Maxim Integrated
Series
MAX7301r
Datasheet

Specifications of MAX7301AAX-T

Maximum Operating Frequency
26 MHz
Operating Supply Voltage
2.5 V to 5.5 V
Operating Temperature Range
- 40 C to + 125 C
Mounting Style
SMD/SMT
Package / Case
SSOP-36
Output Current
4.5 mA, 18 mA
Power Dissipation
941 mW
The MAX7301 compact, serial-interfaced I/O expander
(or general-purpose I/O (GPIO) peripheral) provides
microprocessors with up to 28 ports. Each port is indi-
vidually user configurable to either a logic input or logic
output.
Each port can be configured either as a push-pull logic
output capable of sinking 10mA and sourcing 4.5mA,
or a Schmitt logic input with optional internal pullup.
Seven ports feature configurable transition detection
logic, which generates an interrupt upon change of port
logic level. The MAX7301 is controlled through an
SPI™-compatible 4-wire serial interface.
The MAX7301AAX and MAX7301ATL have 28 ports and
are available in 36-pin SSOP and 40-pin TQFN packages,
respectively. The MAX7301AAI has 20 ports and is avail-
able in a 28-pin SSOP package.
For a 2-wire I
MAX7300 data sheet.
For a pin-compatible port expander with additional
24mA constant-current LED drive capability, refer to the
MAX6957 data sheet.
19-2438; Rev 6; 4/06
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Pin Configurations appear at end of data sheet.
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.
White Goods
Automotive
Gaming Machines
Industrial Controllerss
System Monitoring
4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and
2
C-interfaced version, refer to the
________________________________________________________________ Maxim Integrated Products
General Description
Applications
♦ High-Speed 26MHz SPI-/QSPI-™/MICROWIRE™-
♦ 2.5V to 5.5V Operation
♦ -40°C to +125°C Temperature Range
♦ 20 or 28 I/O Ports, Each Configurable as
♦ 11µA (max) Shutdown Current
♦ Logic Transition Detection for Seven I/O Ports
+Denotes lead-free package.
MAX7301AAI+
MAX7301AAX+
MAX7301ATL+
Compatible Serial Interface
Push-Pull Logic Output
Schmitt Logic Input
Schmitt Logic Input with Internal Pullup
PART
28-Port I/O Expander
CHIP SELECT
DATA OUT
CLOCK IN
DATA IN
47nF
3V
Typical Operating Circuit
39kΩ
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
36
35
33
34
31
29
27
25
24
23
22
21
3
2
1
4
Ordering Information
V+
GND
GND
CS
SCLK
DIN
DOUT
P31
P30
P29
P28
P27
P26
P25
P24
ISET
MAX7301
SSOP
PIN-
PACKAGE
28 SSOP
36 SSOP
40 TQFN
P10
P11
P12
P13
P14
P15
P16
P17
P18
P19
P20
P21
P22
P23
P4
P5
P6
P7
P8
P9
32
30
28
26
5
7
9
11
6
8
10
12
13
14
15
16
17
18
19
20
Features
I/O 4
I/O 5
I/O 6
I/O 7
I/O 8
I/O 9
I/O 10
I/O 11
I/O 12
I/O 13
I/O 14
I/O 15
I/O 16
I/O 17
I/O 18
I/O 19
I/O 20
I/O 21
I/O 22
I/O 23
I/O 24
I/O 25
I/O 26
I/O 27
I/O 28
I/O 29
I/O 30
I/O 31
PKG
CODE
A28-1
A36-4
T4066- 5
1

Related parts for MAX7301AAX-T

MAX7301AAX-T Summary of contents

Page 1

... The MAX7301 is controlled through an SPI™-compatible 4-wire serial interface. The MAX7301AAX and MAX7301ATL have 28 ports and are available in 36-pin SSOP and 40-pin TQFN packages, respectively. The MAX7301AAI has 20 ports and is avail- able in a 28-pin SSOP package ...

Page 2

I/O Expander ABSOLUTE MAXIMUM RATINGS (Voltage with respect to GND.) V+ .............................................................................-0.3V to +6V All Other Pins................................................-0.3V to (V+ + 0.3V) P4–P31 Current ................................................................±30mA GND Current .....................................................................800mA Continuous Power Dissipation (T = +70°C) ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) (Typical Operating Circuit 2.5V to 5.5V, T PARAMETER SYMBOL Port Sink Current Output Short-Circuit Current Input High-Voltage SCLK, DIN, CS Input Low-Voltage SCLK, DIN, CS Input Leakage Current SCLK, ...

Page 4

I/O Expander __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted.) A OPERATING SUPPLY CURRENT vs. TEMPERATURE 0. 2.5V TO 5.5V 0.36 NO LOAD 0.32 0.28 ALL PORTS ALL PORTS OUTPUT ...

Page 5

... P31, individually as GPIO. A pair of bits in registers 0x09 through 0x0F sets each port’s configuration (Tables 1 and 2). The 36-pin MAX7301AAX and 40-pin MAX7301ATL have 28 ports P31. The 28-pin MAX7301AAI is offered in 20 ports, P12 to P31. The eight unused ports should be configured as outputs on power-up by writ- ing 0x55 to registers 0x09 and 0x0A ...

Page 6

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 Port Configuration for P19, ...

Page 7

GPIO P4 TO P31 GPIO DATA DIN SCLK Figure 1. MAX7301 Functional Diagram The MAX7301 is written to using the following sequence: 1) Take SCLK low. ...

Page 8

I/O Expander CS t CSS t CSH SCLK DIN DOUT Figure 2. 4-Wire Interface Initial Power-Up On initial power-up, all control registers are reset, and the MAX7301 enters shutdown ...

Page 9

MICROCONTROLLER SERIAL-DATA INPUT SERIAL CS OUTPUT SERIA-CLOCK OUTPUT SERIAL-DATA OUTPUT Figure 3. Daisy-Chain Arrangement for Controlling Multiple MAX7301s CS SCLK D15 DIN D14 D13 D12 = 0 DOUT Figure 4. Transmission of a16-Bit Write ...

Page 10

I/O Expander Table 3. Register Address Map REGISTER No-Op Configuration Transition Detect Mask Factory Reserved. Do not write to this. Port Configuration P7, P6, P5, P4 Port Configuration P11, P10, P9, P8 Port ...

Page 11

Table 3. Register Address Map (continued) REGISTER Port 26 only (data bit D0. D7–D1 read as 0) Port 27 only (data bit D0. D7–D1 read as 0) Port 28 only (data bit D0. D7–D1 ...

Page 12

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 OUTPUT LATCH GPIO INPUT ...

Page 13

Table 4. Power-Up Configuration REGISTER POWER-UP CONDITION FUNCTION Port Register GPIO Output Low Bits Configuration Shutdown Enabled Register Transition Detection Disabled Input Mask All Clear (Masked Off) Register Port P7, P6, ...

Page 14

I/O Expander Table 7. Transition Detection Control (M Data Bit D7) Format ADDRESS CODE FUNCTION (HEX) Disabled 0x04 Enabled 0x04 Table 8. Transition Detection Mask Register REGISTER READ/ FUNCTION ADDRESS WRITE (HEX) Read ...

Page 15

TOP VIEW + ISET ISET GND GND GND GND 3 26 DIN DOUT DOUT 4 25 SCLK P8 P12 5 24 P31 P12 P13 6 23 P30 MAX7301 ...

Page 16

I/O Expander (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 NOTES: 1. D&E DO NOT INCLUDE ...

Page 17

... 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 ____________________ 17 © 2006 Maxim Integrated Products ...

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