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PCF8575CDW 数据表(PDF) 5 Page - Texas Instruments

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部件名 PCF8575CDW
功能描述  SMBus Low-Power I/O Expander
PDF  38 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

PCF8575CDW 数据表(HTML) 5 Page - Texas Instruments

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PCF8575C
www.ti.com
SCPS123F – MARCH 2005 – REVISED JANUARY 2015
6.5
Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP(1)
MAX
UNIT
4.5 V to
VIK
Input diode clamp voltage
II = –18 mA
–1.2
V
5.5 V
VPOR Power-on reset voltage
(2)
VI = VCC or GND,
IO = 0
VPOR
1.2
1.8
V
IOHT
P-port transient pullup current
High during ACK VOH = GND
4.5 V
–0.5
–1
mA
4.5 V to
SDA
VOL = 0.4 V
3
5.5 V
VOL = 0.4 V
5
15
4.5 V to
IOL
P port
mA
5.5 V
VOL = 1 V
10
25
4.5 V to
INT
VOL = 0.4 V
1.6
5.5 V
SCL, SDA
±2
4.5 V to
II
VI = VCC or GND
μA
5.5 V
A0, A1, A2
±1
4.5 V to
IIHL
P port
VI ≥ VCC or VI ≤ GND
±400
μA
5.5 V
Operating mode
VI = VCC or GND,
IO = 0, fSCL = 400 kHz
100
200
ICC
5.5 V
μA
Standby mode
VI = VCC or GND,
IO = 0, fSCL = 0 kHz
2.5
10
One input at VCC – 0.6 V,
4.5 V to
ΔICC
Supply current increase
200
μA
Other inputs at VCC or GND
5.5 V
4.5 V to
Ci
SCL
VI = VCC or GND
3
7
pF
5.5 V
SDA
3
7
4.5 V to
Cio
VIO = VCC or GND
pF
5.5 V
P port
4
10
(1)
All typical values are at VCC = 5 V, TA = 25°C.
(2)
The power-on reset circuit resets the I2C bus logic with VCC < VPOR and sets all I/Os to logic high (with current source to VCC).
6.6
I
2C Interface Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 7)
MIN
MAX
UNIT
fscl
I2C clock frequency
400
kHz
tsch
I2C clock high time
0.6
μs
tscl
I2C clock low time
1.3
μs
tsp
I2C spike time
50
ns
tsds
I2C serial-data setup time
100
ns
tsdh
I2C serial-data hold time
0
ns
ticr
I2C input rise time
20 + 0.1Cb
(1)
300
ns
ticf
I2C input fall time
20 + 0.1Cb
(1)
300
ns
tocf
I2C output fall time (10-pF to 400-pF bus)
300
ns
tbuf
I2C bus free time between stop and start
1.3
μs
tsts
I2C start or repeated start condition setup
0.6
μs
tsth
I2C start or repeated start condition hold
0.6
μs
tsps
I2C stop condition setup
0.6
μs
tvd
Valid-data time
SCL low to SDA output valid
1.2
μs
Cb
I2C bus capacitive load
400
pF
(1)
Cb = total bus capacitance of one bus line in pF
Copyright © 2005–2015, Texas Instruments Incorporated
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