Datasheet > MAX7326

MAX7326

更新时间： 2023-12-20 18:45:31

品牌	Logo	应用领域
亚德诺 - ADI		/
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18页	959K
描述
I2C端口扩展器，提供12路推挽式输出和4路输入

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MAX7326 数据手册

MAX7326

I²C Port Expander with

12 Push-Pull Outputs and 4 Inputs

Port and Interrupt INT Timing Characteristics

(V+ = +1.71V to +5.5V, T = -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, T = +25°C.) (Note 1)

PARAMETER

Port Output Data Valid

Port Input Setup Time

Port Input Hold Time

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

µs

C ≤ 100pF

PPV

C ≤ 100pF

µs

PSU

C ≤ 100pF

µs

INT Input Data Valid Time

C ≤ 100pF

µs

INT Reset Delay Time from STOP

C ≤ 100pF

µs

INT Reset Delay Time from

C ≤ 100pF

µs

Acknowledge

Timing Characteristics

(V+ = +1.71V to +5.5V, T = -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, T = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX UNITS

Serial Clock Frequency

400

kHz

µs

SCL

Bus Free Time Between a STOP

and a START Condition

Hold Time (Repeated) START

Condition

Repeated START Condition

Setup Time

1.3

0.6

BUF

µs

HD,STA

0.6

SU,STA

STOP Condition Setup Time

Data Hold Time

µs

SU,STO

(Note 2)

0.9

HD,DAT

Data Setup Time

100

1.3

0.7

SU,DAT

SCL Clock Low Period

SCL Clock High Period

LOW

HIGH

Rise Time of Both SDA and SCL

Signals, Receiving

Fall Time of Both SDA and SCL

Signals, Receiving

20 +

(Notes 3, 4)

300

250

0.1C

20 +

0.1C

20 +

Fall Time of SDA Transmitting

(Notes 3, 4)

(Note 5)

µs

F,TX

0.1C

Pulse Width of Spike Suppressed

Capacitive Load for Each

Bus Line

(Note 3)

400

RST Pulse Width

RST Rising to START Condition

500

RST

Setup Time

Note 1: All parameters are tested at T = +25°C. Specifications over temperature are guaranteed by design.

Note 2: A master device must provide a hold time of at least 300ns for the SDA signal (referred to V of the SCL signal) to bridge

the undefined region of SCL’s falling edge.

Note 3: Guaranteed by design.

Note 4: Cb = total capacitance of one bus line in pF. I

≤ 6mA. t and t measured between 0.3 x V+ and 0.7 x V+.

R F

SINK

Note 5: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.

Maxim Integrated

│ 3

www.maximintegrated.com

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