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參數(shù)資料
型號： PCA8575PW,112
廠商： NXP Semiconductors
文件頁數(shù)： 7/30頁
文件大?。?/td> 0K
描述： IC I/O EXPANDER I2C 16B 24TSSOP
產品培訓模塊： I²C Bus Fundamentals
特色產品： NXP - I2C Interface
標準包裝： 63
接口： I²C
輸入/輸出數(shù)： 16
中斷輸出： 是
頻率 - 時鐘： 400kHz
電源電壓： 2.3 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 24-TSSOP（0.173"，4.40mm 寬）
供應商設備封裝： 24-TSSOP
包裝： 管件
包括： POR
產品目錄頁面： 824 (CN2011-ZH PDF)
其它名稱： 568-4230-5
935283505112
PCA8575PW
PCA8575PW-ND
PCA8575_2
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 21 March 2007
15 of 30
NXP Semiconductors
PCA8575
Remote 16-bit I/O expander for I2C-bus with interrupt
10.3 Differences between the PCA8575 and the PCF8575
The PCA8575 is a drop in replacement for the PCF8575 and can used without electrical
or software modications, but there is a difference in interrupt output release timing during
the read operation.
Write operations are identical. At the completion of each 8-bit write sequence the data is
stored in its associated 8-bit write register at ACK or NACK. The rst byte goes to P0n
while the second goes to P1n. Subsequent writes without a STOP wrap around to P0n
then P1n again. Any write will update both read registers and clear interrupts.
Read operations are identical. Both devices update the byte register with the pin data as
each 8-bit read is initiated, the very rst read after an address cycle corresponds to ports
P0n while the second (even byte) corresponds to P1n and subsequent reads without a
STOP wrap around to P0n then P1n again.
During read operations, the PCA8575 interrupt output will be cleared in a byte-wise
fashion as each byte is read. Reading the rst byte will clear any interrupts associated
with the P0n pins. This rst byte read operation will have no effect on interrupts associated
with changes of state on the P1n pins. Interrupts associated with the P1n pins will be
cleared when the second byte is read. Reading the second byte has no effect on
interrupts associated with the changes of state on the P0x pins. The PCF8575 interrupt
output will clear after reading both bytes of data regardless of whether data was changed
in the rst byte or the second byte or both bytes.
11. Limiting values
[1]
Total package (maximum) output current is 600 mA.
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
Min
Max
Unit
VDD
supply voltage
0.5
+6
V
IDD
supply current
-
±100
mA
ISS
ground supply current
-
±600
mA
VI
input voltage
VSS 0.5
5.5
V
II
input current
-
±20
mA
IO
output current
-
±50[1]
mA
Ptot
total power dissipation
-
600
mW
P/out
power dissipation per output
-
200
mW
Tstg
storage temperature
65
+150
°C
Tamb
ambient temperature
operating
40
+85
°C
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