參數(shù)資料
型號(hào)： 935271753118
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8 I/O, PIA-GENERAL PURPOSE, PDSO20
封裝： 4.40 MM, PLASTIC, MO-152, SOT-266-1, SSOP-20
文件頁(yè)數(shù)： 18/33頁(yè)
文件大小： 316K
代理商： 935271753118
Philips Semiconductors - PIP - PCF8574; Remote 8-bit I/O expander for I2C-bus
PCF8574; Remote 8-bit I/O
expander for IC-bus
Information as of 2004-09-01
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informed
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datasheet
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General description
The PCF8574 is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line
bidirectional bus (IC-bus).
The device consists of an 8-bit quasi-bidirectional port and an IC-bus interface. The PCF8574 has a low current consumption and includes latched
outputs with high current drive capability for directly driving LEDs. It also possesses an interrupt line (INT) which can be connected to the interrupt
logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on
its ports without having to communicate via the IC-bus. This means that the PCF8574 can remain a simple slave device.
The PCF8574 and PCF8574A versions differ only in their slave address as shown in Fig.10.
Features
q
Operating supply voltage 2.5 to 6 V
q
Low standby current consumption of 10 uA maximum
q
IC-bus to parallel port expander
q
Open-drain interrupt output
q
8-bit remote I/O port for the IC-bus
q
Compatible with most microcontrollers
q
Latched outputs with high current drive capability for directly driving LEDs
q
Address by 3 hardware address pins for use of up to 8 devices (up to 16 with PCF8574A)
q
DIP16, or space-saving SO16 or SSOP20 packages.
http://www.semiconductors.philips.com/pip/PCF8574P.html (1 of 7) [9/3/2004 4:31:22 PM]
相關(guān)PDF資料
PDF描述
935275581112 8 I/O, PIA-GENERAL PURPOSE, PDSO16
0672.300 Circular Connector; Body Material:Aluminum; Series:PT06; No. of Contacts:55; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Circular Contact Gender:Socket; Insert Arrangement:22-55
935084920112 TELEPHONE SPEECH CKT, PDSO20
935084920118 TELEPHONE SPEECH CKT, PDSO20
935084930112 TELEPHONE SPEECH CKT, PDIP20
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