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參數(shù)資料
| 型號(hào)： | MAX7322ATE+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 5/18頁 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 4B 16TQFN-EP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 接口： | I²C |
| 輸入/輸出數(shù)： | 4 |
| 中斷輸出： | 是 |
| 頻率 - 時(shí)鐘： | 400kHz |
| 電源電壓： | 1.7 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： | 管件 |
| 包括： | POR |
MAX7322
I2C Port Expander with
4 Push-Pull Outputs and 4 Inputs
______________________________________________________________________________________
13
data is the current port data transmitted to the master,
so any input port changes occurring during the trans-
mission are detected. INT remains high until the STOP
condition.
Writing to the MAX7322
A write to the MAX7322 starts with the master transmit-
ting the MAX7322’s slave address with the R/W bit set
low. The MAX7322 acknowledges the slave address,
and samples the ports (takes a snapshot) during
acknowledge. INT deasserts during the slave acknowl-
edge. The master proceeds to transmit 1 or more bytes
of data. The MAX7322 acknowledges these subse-
quent bytes of data and updates the four output ports
and the 4-bit interrupt mask register with each new byte
until the master issues a STOP condition (Figure 8).
Applications Information
Port Input and I2C Interface Level
Translation from Higher or Lower
Logic Voltages
The MAX7322’s SDA, SCL, AD0, AD2, input RST, INT,
and input ports I2–I5 are overvoltage protected to +6V
independent of V+. This allows the MAX7322 to operate
from a lower supply voltage, such as +3.3V, while the
I2C interface and/or some of the four input ports are dri-
ven from a higher logic level, such as +5V.
The MAX7322 can operate from a higher supply volt-
age, such as +3V, while the I2C interface and/or some
of the four input ports I2–I5 are driven from a lower
logic level, such as +2.5V. Apply a minimum voltage of
0.7 x V+ to assert a logic-high on any input. For exam-
ple, a MAX7322 operating from a +5V supply may not
recognize a +3.3V nominal logic-high. One solution for
input-level translation is to drive the MAX7322 inputs
from open-drain outputs. Use a pullup resistor to V+ or
a higher supply to ensure a high logic voltage of
greater than 0.7 x V+.
SCL
SDA
START CONDITION
R/W ACKNOWLEDGE
FROM SLAVE
SLAVE ADDRESS
S0
123
4
5
6
7
8
AA
A
tPV
DATA 1
DATA 2
DATA 2 VALID
DATA 1 VALID
INTERNAL WRITE
TO PORT
DATA OUT
FROM PORT
ACKNOWLEDGE
FROM SLAVE
ACKNOWLEDGE
FROM SLAVE
tPV
DATA TO INTERRUPT MASK
S = START CONDITION
P = STOP CONDITION
SHADED = SLAVE TRANSMISSION
N = NOT ACKNOWLEDGE
Figure 8. Writing to the MAX7322
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7322ATE+ | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/4 P-P Out & 4 In RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7322ATE+T | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/4 P-P Out & 4 In RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7322ATE-T | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/4 P-P Out & 4 In RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7322EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX7322 EVAL KIT/EVAL SYS - Rail/Tube |
| MAX7323 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C Port Expander with 4 Push-Pull Outputs |
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