I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os 9 Maxim Integra" />
參數(shù)資料
型號(hào): MAX7325ATG+
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 17/17頁(yè)
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 24TQFN-EP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 75
接口: I²C
輸入/輸出數(shù): 8
中斷輸出:
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: 24-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 24-TQFN-EP(4x4)
包裝: 管件
包括: POR
MAX7325
I2C Port Expander with 8 Push-Pull
and 8 Open-Drain I/Os
9
Maxim Integrated
PIN
CONNECTION
DEVICE ADDRESS
OUTPUTS POWER-UP DEFAULT
AD2
AD0
A6
A5
A4
A3
A2
A1
A0
O15
O14
O13
O12
O11
O10
O9
O8
SCL
GND
10
100
00
11
00
SCL
V+
10
100
01
11
SCL
10
100
10
11
SCL
SDA
10
100
11
SDA
GND
10
101
00
11
00
SDA
V+
10
101
01
11
SDA
SCL
10
101
10
11
SDA
10
101
11
GND
10
110
00
GND
V+
10
110
01
00
11
GND
SCL
10
110
10
00
11
GND
SDA
10
110
11
00
11
V+
GND
10
111
00
11
00
V+
10
111
01
11
V+
SCL
10
111
10
11
V+
SDA
10
111
11
Table 3. MAX7325 Address Map for Outputs O8–O15
Port Inputs
I/O port inputs switch at the CMOS-logic levels as
determined by the expander’s supply voltage, and are
overvoltage tolerant to +6V, independent of the
expander’s supply voltage.
I/O Port Input Transition Detection
All I/O ports configured as inputs are monitored for
changes since the expander was last accessed through
the serial interface. The state of the ports is stored in an
internal “snapshot” register for transition monitoring. The
snapshot is continuously compared with the actual input
conditions, and if a change is detected for any port input,
INT is asserted to signal a state change. The input ports
are sampled (internally latched into the snapshot register)
and the old transition flags cleared during the I2C acknowl-
edge of every MAX7325 read and write access. The previ-
ous port transition flags are read through the serial
interface as the second byte of a 2-byte read sequence.
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