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參數(shù)資料
| 型號： | MAX7320ATE+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 12/14頁 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16TQFN-EP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 100 |
| 接口： | I²C |
| 輸入/輸出數(shù)： | 8 |
| 中斷輸出： | 無 |
| 頻率 - 時鐘： | 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 |
| 供應商設備封裝： | 16-TQFN-EP（3x3） |
| 包裝： | 管件 |
| 包括： | POR |
The RST input clears the serial interface in case of a
hung bus, terminating any serial transaction to or from
the MAX7320.
When the MAX7320 is read through the serial interface,
the actual logic states at the ports are read back.
Output port power-up logic states are selected by the
address select inputs AD0 and AD2. Ports default to
logic-high or logic-low on power-up in groups of four
(see Table 3).
RST Input
The RST input voids any I2C transaction involving the
MAX7320 and forces the MAX7320 into the I2C STOP
condition. A reset does not change the contents of the
output register. RST is overvoltage tolerant to +5.5V.
Standby Mode
When the serial interface is idle, the MAX7320 automat-
ically enters standby mode, drawing minimal supply
current.
Slave Address and Power-Up
Default Logic States
Address inputs AD0 and AD2 determine the MAX7320
slave address and set the power-up output logic states.
Power-up logic states are set in groups of four (see
Table 3). The MAX7320 uses a different range of slave
addresses (101xxxx) than the MAX7319, MAX7321,
MAX7322, and MAX7323 (110xxxx).
The MAX7320 slave address is determined on each I2C
transmission, regardless of whether the transmission is
actually addressing the MAX7320. The MAX7320 distin-
guishes whether address inputs AD0 and AD2 are con-
nected to SDA or SCL instead of fixed logic levels V+
or GND during this transmission. This means that the
MAX7320 slave address can be configured dynamical-
ly in the application without cycling the device supply.
On initial power-up, the MAX7320 cannot decode the
address inputs AD0 and AD2 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 the power-up logic levels
of the output ports. 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 MAX7320. This is guaranteed as part
of the I2C specification. Therefore, address inputs AD0
and AD2 that are connected to SDA or SCL normally
appear at power-up to be connected to V+. The power-
up output state selection logic uses AD0 to select the
power-up state for ports O3–O0, and uses AD2 to
select the power-up state for ports O7–O4. The rule is
that a logic-high, SDA, or SCL connection selects a
MAX7320
I2C Port Expander with Eight Push-Pull Outputs
_______________________________________________________________________________________
7
PIN
CONNECTION
DEVICE ADDRESS
OUTPUTS POWER-UP DEFAULT
AD2
AD0
A6
A5
A4
A3
A2
A1
A0
O7
O6
O5
O4
O3
O2
O1
O0
SCL
GND
101
000
011
110
000
SCL
V+
101
000
111
SCL
101
001
011
111
SCL
SDA
101
001
111
SDA
GND
101
010
011
110
000
SDA
V+
101
010
111
SDA
SCL
101
011
111
SDA
101
011
111
GND
101
100
000
GND
V+
1
0
1
100
001
111
GND
SCL
101
000
001
111
GND
SDA
101
100
001
111
V+
GND
101
110
011
110
000
V+
101
110
111
V+
SCL
101
111
011
111
V+
SDA
101
111
Table 3. MAX7320 Address Map
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7320ATE+ | 功能描述:接口-I/O擴展器 I2C Port Expander w/8 Push-Pull Out 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 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7320ATE+T | 功能描述:接口-I/O擴展器 I2C Port Expander w/8 Push-Pull Out 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 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7320ATE-T | 功能描述:接口-I/O擴展器 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 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7320EVKIT+ | 功能描述:界面開發(fā)工具 Evaluation Kit for the MAX7320 RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| MAX7321 | 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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