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PCF8574DWRG4 数据表(PDF) 7 Page - Texas Instruments

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部件名 PCF8574DWRG4
功能描述  REMOTE 8-BIT I/O EXPANDER FOR I2C BUS
PDF  26 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

PCF8574DWRG4 数据表(HTML) 7 Page - Texas Instruments

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Electrical Characteristics
I
2C Interface Timing Requirements
PCF8574
www.ti.com ............................................................................................................................................................... SCPS068G – JULY 2001 – REVISED MAY 2008
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
MIN TYP(1)
MAX
UNIT
VIK
Input diode clamp voltage
II = –18 mA
2.5 V to 6 V
–1.2
V
VPOR
Power-on reset voltage(2)
VI = VCC or GND,
IO = 0
6 V
1.3
2.4
V
IOH
P port
VO = GND
2.5 V to 6 V
30
300
µA
IOHT
P-port transient pullup current
High during acknowledge, VOH = GND
2.5 V
–1
mA
SDA
VO = 0.4 V
2.5 V to 6 V
3
IOL
P port
VO = 1 V
5 V
10
25
mA
INT
VO = 0.4 V
2.5 V to 6 V
1.6
SCL, SDA
±5
II
INT
VI = VCC or GND
2.5 V to 6 V
±5
µA
A0, A1, A2
±5
IIHL
P port
VI ≥ VCC or VI ≤GND
2.5 V to 6 V
±400
µA
Operating mode
VI = VCC or GND,
IO = 0,
fSCL = 100 kHz
40
100
ICC
6 V
µA
Standby mode
VI = VCC or GND,
IO = 0
2.5
10
Ci
SCL
VI = VCC or GND
2.5 V to 6 V
1.5
7
pF
SDA
3
7
Cio
VIO = VCC or GND
2.5 V to 6 V
pF
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).
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
MIN
MAX
UNIT
fscl
I2C clock frequency
100
kHz
tsch
I2C clock high time
4
µs
tscl
I2C clock low time
4.7
µs
tsp
I2C spike time
100
ns
tsds
I2C serial data setup time
250
ns
tsdh
I2C serial data hold time
0
ns
ticr
I2C input rise time
1
µs
ticf
I2C input fall time
0.3
µs
tocf
I2C output fall time (10-pF to 400-pF bus)
300
ns
tbuf
I2C bus free time between stop and start
4.7
µs
tsts
I2C start or repeated start condition setup
4.7
µs
tsth
I2C start or repeated start condition hold
4
µs
tsps
I2C stop condition setup
4
µs
tvd
Valid data time
SCL low to SDA output valid
3.4
µs
Cb
I2C bus capacitive load
400
pF
Copyright © 2001–2008, Texas Instruments Incorporated
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Product Folder Link(s): PCF8574



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