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參數(shù)資料
| 型號： | MAX7319ATE+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16TQFN-EP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 接口： | I²C |
| 輸入/輸出數(shù)： | 8 |
| 中斷輸出： | 是 |
| 頻率 - 時(shí)鐘： | 400kHz |
| 電源電壓： | 1.71 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 16-TQFN-EP（3x3） |
| 包裝： | 帶卷 (TR) |
MAX7319
changes. An input change sets one of eight flag bits
that identify changed input(s). All flags are cleared
upon a subsequent read or write transaction to the
MAX7319.
A latching interrupt output, INT, is programmed to flag
input data changes on input ports through an interrupt
mask register. By default, data changes on any input
port force INT to a logic-low. The interrupt output, INT,
and all transition flags are cleared when the MAX7319
is next accessed through the serial interface.
Internal pullup resistors to V+ are selected by the
address-select inputs, AD0 and AD2. Pullups are
enabled on the input ports in groups of four (see Table 3).
Initial Power-Up
On power-up, the transition detection logic is reset, and
INT is released to a high-impedance state. The inter-
rupt mask register is set to 0xFF, enabling the interrupt
output for transitions on all eight input ports. The transi-
tion flags are cleared to indicate no data changes.
RST Input
The RST input voids any I2C transaction involving the
MAX7319, forcing the MAX7319 into the I2C STOP con-
dition. A reset does not affect the interrupt output (INT)
or change the contents of the interrupt mask register.
RST is overvoltage tolerant to +6V.
Standby Mode
When the serial interface is idle, the MAX7319 automat-
ically enters standby mode, drawing minimal supply
current.
Slave Address and Input Pullup Selection
Address inputs AD0 and AD2 determine the MAX7319
slave address and select which inputs have pullup
resistors. Pullups are enabled on the input ports in
groups of four (see Table 3). The MAX7319, MAX7321,
MAX7322, and MAX7323 use a different range of slave
addresses (110xxxx) than the MAX7320 (101xxxx).
The MAX7319 slave address is determined on each I2C
transmission, regardless of whether the transmission is
actually addressing the MAX7319. The MAX7319 distin-
guishes whether address inputs AD2 and AD0 are con-
nected to SDA or SCL instead of fixed logic levels V+
or GND during this transmission. This means that the
MAX7319 slave address can be configured dynamically
in the application without cycling the device supply.
On initial power-up, the MAX7319 cannot decode the
address inputs AD2 and AD0 fully until the first I2C
transmission. AD0 and AD2 initially appear to be con-
nected to V+ or GND. This is important because the
address selection determines which inputs have
pullups applied. However, at power-up, the I2C SDA
and SCL bus interface lines are high impedance at the
pins of every device (master or slave) connected to the
bus, including the MAX7319. This is guaranteed as part
I2C Port Expander with Eight Inputs and
Maskable Transition Detection
6
_______________________________________________________________________________________
PART
I2C
SLAVE
ADDRESS
INPUTS
INPUT
INTERRUPT
MASK
OPEN-
DRAIN
OUTPUTS
PUSH-
PULL
OUTPUTS
APPLICATION
MAX7323
110xxxx
Up to 4
—
Up to 4
4
Four I/O, four output-only versions:
Four open-drain I/O ports with latching transition
detection interrupt and selectable pullups.
Four push-pull outputs with selectable power-up
default levels.
MAX7328
MAX7329
0100xxx
0111xxx
Up to 8
—
Up to 8
—
PCF8574-, PCF8574A-compatible versions:
Eight open-drain I/O ports with nonlatching transition
detection interrupt and pullups on all ports.
All ports power up as inputs (or logic-high outputs).
Any port can be used as an input by setting the
open-drain output to logic-high.
16-PORT EXPANDERS
MAX7324
8
Yes
—
8
Software equivalent to a MAX7320 plus a MAX7321.
MAX7325
Up to 8
—
Up to 8
8
Software equivalent to a MAX7320 plus a MAX7319.
MAX7326
4
Yes
—
12
Software equivalent to a MAX7320 plus a MAX7322.
MAX7327
101xxxx
and
110xxxx
Up to 4
—
Up to 4
12
Software equivalent to a MAX7320 plus a MAX7323.
Table 1. MAX7319–MAX7329 Family Comparison (continued)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX7322AEE+T | IC I/O EXPANDER I2C 4B 16QSOP |
| MAX7321AEE+T | IC I/O EXPANDER I2C 8B 16QSOP |
| MAX7310AUE+T | IC I/O EXPANDER I2C 8B 16TSSOP |
| MAX7310AEE+T | IC I/O EXPANDER I2C 8B 16QSOP |
| MAX7323AEE+T | IC I/O EXPANDER I2C 4B 16QSOP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7319EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX7319 EVAL KIT - Boxed Product (Development Kits) |
| MAX731C/D | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:+5V/Adjustable Step-Up Current-Mode DC-DC Converters |
| MAX731C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX731CPA | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX731CPA+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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