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參數(shù)資料
| 型號(hào)： | MAX7321ATE+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 6/15頁(yè) |
| 文件大小： | 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： | 100 |
| 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： | 管件 |
| 包括： | POR |
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MAX7321
I2C Port Expander with 8 Open-Drain I/Os
14
Maxim Integrated
Driving Load Currents Higher than 20mA
The MAX7321 can be used to drive loads, such as
relays, that draw more than 20mA by paralleling out-
puts. Use at least one output per 20mA of load current;
for example, a 5V, 330mW relay draws 66mA, and
therefore, requires four paralleled outputs. Any combi-
nation of outputs can be used as part of a load-sharing
design because any combination of ports can be set or
cleared at the same time by writing the MAX7321. Do
not exceed a total sink current of 100mA for the device.
The MAX7321 must be protected from the negative
voltage transient generated when switching off induc-
tive loads (such as relays), by connecting a reverse-
biased diode across the inductive load. Choose the
peak current for the diode to be greater than the induc-
tive load’s operating current.
Power-Supply Considerations
The MAX7321 operates with a supply voltage of +1.71V
to +5.5V over the -40°C to +125°C temperature range.
Bypass the supply to GND with a ceramic capacitor of
at least 0.047F as close to the device as possible. For
the TQFN version, additionally connect the exposed
pad to GND.
Issue: I2C Flag Clearing
De-Assertion Anomaly
Description of Problem
The MAX7321 clears data stored in the interrupt flag
and deasserts the corresponding interrupt only when
the I2C master reads a different I2C slave on the same
bus.
Workaround
To keep the interrupt flag data valid, the user must read
the MAX7321 device BEFORE any other device on the
I2C bus, after a pending interrupt. This limits the bus to
only one MAX7321 device.
Pin Configurations (continued)
MAX7321
P2
P7
P6
P5
P4
V+
+3.3V
+5V
C
SCL
SDA
SCL
AD0
P1
P0
SDA
P3
I/O
AD2
GND
I/O
RST
INT
0.047
F
Typical Application Circuit
15
16
14
13
5
6
7
P1
P2
8
AD2
P7
P6
SCL
13
V+
4
12
10
9
AD0
RST
P5
P4
GND
P3
MAX7321
P0
INT
2
11
SDA
TQFN
TOP VIEW
*EP
*EXPOSED PAD, CONNECTED TO GND
+
Package Information
For the latest package outline information and land patterns (foot-
prints), go to www.maximintegrated.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE NO.
LAND
PATTERN NO.
16 QSOP
E16-4
16 TQFN-EP
T1633-4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7321ATE+ | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/8 Open-Drain I/Os 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 |
| MAX7321ATE+T | 功能描述:接口-I/O擴(kuò)展器 I2C Port Expander w/8 Open-Drain I/Os 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 |
| MAX7321ATE-T | 功能描述:接口-I/O擴(kuò)展器 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 |
| MAX7321AUP | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:I2C Port Expander with 8 Open-Drain I/Os |
| MAX7322 | 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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