ST1284 查看數據表（PDF） - STMicroelectronics

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ST1284

Parallel port single termination network with ±15 kV ESD protection

STMicroelectronics 

ST1284

2

Application information

Application information

The functional diagram here above presents a IEEE1284-A connector pinout and show how

to connect the ST1284-01A8 in order to correctly terminate and filter the 17 signal lines. The

IEEE1284-A connector is the PC standard for the host connection.

Control and status lines (from 10 to 17) only require a pull-up resistor (Rp) and a filter

capacitor (C).

The data lines (from 2 to 9) and the STROBE (pin 1) also require a termination series

resistor (Rs) in addition to the pull-up resistor and a filter capacitor. The VCC is connected to

pin 20 and the ground to pin 22.

The ST1284-01A8 can be used with all 3 types of connectors defined in the IEEE1284

standard:

– IEEE1284-A is a 25 dB connector which is the PC standard for the host

connection.

– IEEE1284-B is a 36 pin, 0.085 inch center line connector used on the peripheral

device.

– IEEE1284-C is a new 36 pin, 0.050 inch center line connector which can be used

for both host and peripherals.

Doc ID 6976 Rev 4

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