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参数资料
| 型号： | MAX7319ATE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/16页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16TQFN-EP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 接口： | I²C |
| 输入/输出数： | 8 |
| 中断输出： | 是 |
| 频率 - 时钟： | 400kHz |
| 电源电压： | 1.71 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（3x3） |
| 包装： | 带卷 (TR) |
MAX7319
Slave Address
The MAX7319 has a 7-bit slave address (Figure 5). The
8th bit following the 7-bit slave address is the R/W bit. It
is low for a write command, and high for a read com-
mand.
The 1st (A6), 2nd (A5), and 3rd (A4) bits of the MAX7319
slave address are always 1, 1, and 0. Connect AD2 and
AD0 to GND, V+, SDA, or SCL to select slave address
bits A3, A2, A1, and A0. The MAX7319 has 16 possible
slave addresses (Table 3), allowing up to 16 MAX7319
devices on an I2C bus
Accessing the MAX7319
I2C-interface access to the MAX7319 is summarized as
follows (Table 2).
A single-byte read from the MAX7319 returns the sta-
tus of the eight input ports, and clears both the internal
transition flags and the INT output (Figure 7).
A 2-byte read returns the status of the eight input ports
(as for a single-byte read), followed by the transition
flags. The internal transition flags and the INT output
are cleared when the MAX7319 acknowledges the
slave address byte, but the previous transition flag data
is sent as the second byte (Figure 8).
A multibyte read (more than 2 bytes before the I2C
STOP bit) repeatedly returns the input port data, alter-
nating with the transition flags. As the input data is
resampled for each transmission, and the transition
flags are reset each time, a multibyte read continuously
returns the current data and identifies any changing
input ports.
If a port input data change occurs during the read
sequence, INT is reasserted after the I2C STOP bit. The
MAX7319 does not generate another interrupt during a
single-byte or multibyte read.
I2C Port Expander with Eight Inputs and
Maskable Transition Detection
10
______________________________________________________________________________________
SDA
SCL
.
11
A3
A2
A1
A0
0
R/W
MSB
LSB
ACK
Figure 5. Slave Address
SCL
MAX7319 SLAVE ADDRESS
S1
1
0
A
P
1
PORT INPUT
tIV
N
I0
I1
I2
I3
I4
I5
I6
I7
D0
D1
D2
D3
D4
D5
D6
D7
PORT INPUTS
INT OUTPUT
R/W
PORT SNAPSHOT
tPH
tIR
PORT SNAPSHOT
tPSU
tIP
INT REMAINS HIGH UNTIL STOP CONDITION
Figure 6. Reading from the MAX7319 (1 Data Byte)
S = START CONDITION
SHADED = SLAVE TRANSMISSION
P = STOP CONDITION
N = NOT ACKNOWLEDGE
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7319EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX7319 EVAL KIT - Boxed Product (Development Kits) |
| MAX731C/D | 制造商:MAXIM 制造商全称: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/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX731CPA+ | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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