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PCAL9554B bảng dữ liệu(PDF) 29 Page - NXP Semiconductors

tên linh kiện PCAL9554B
Giải thích chi tiết về linh kiện  Low-voltage 8-bit I2C-bus and SMBus low power I/O port with interrupt, weak pull-up and Agile I/O
PDF  42 Pages
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nhà sản xuất  NXP [NXP Semiconductors]
Trang chủ  http://www.nxp.com
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PCAL9554B bảng dữ liệu(HTML) 29 Page - NXP Semiconductors

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PCAL9554B_PCAL9554C
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 2 — 10 December 2012
29 of 42
NXP Semiconductors
PCAL9554B; PCAL9554C
Low-voltage 8-bit I2C-bus/SMBus low power I/O port
14. Parameter measurement information
a. SDA load configuration
b. Transaction format
c. Voltage waveforms
CL includes probe and jig capacitance.
All inputs are supplied by generators having the following characteristics: PRR
 10 MHz; Z
o =50 ; tr/tf  30 ns.
All parameters and waveforms are not applicable to all devices.
Byte 1 = I2C-bus address; Byte 2, byte 3 = P port data.
(1) See Figure 9.
Fig 29. I2C-bus interface load circuit and voltage waveforms
002aag803
DUT
CL = 50 pF
RL = 1 kΩ
SDA
VDD
STOP
condition
(P)
Data
Bit 0
(LSB)
Data
Bit 7
(MSB)
ACK
(A)
R/W
Bit 0
(LSB)
Address
Bit 1
Address
Bit 7
(MSB)
START
condition
(S)
STOP
condition
(P)
two bytes for read Input port register(1)
002aag952
tLOW
tHIGH
tr
tf
0.7 × VDD
0.3 × VDD
0.7 × VDD
0.3 × VDD
tSP
tBUF
tf
tHD;STA
tr
SCL
SDA
tSU;DAT
tHD;DAT
tf(o)
tVD;ACK
tVD;DAT
tVD;ACK
tSU;STA
tSU;STO
002aag804
repeat START condition
STOP condition



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