53

Corporation

SIGNAL PROCESSING EXCELLENCE

Notes:

1.

In Loop-back mode

2.

Only one output drive pin per package will be shorted at any time

3.

From 10% to 90% of steady-state

4.

This is an absolute maximum rating; normal operating levels are V

5.

Outputs unloaded; Inputs tied to GND; T

Typical SP302 current drains under full load are:

18mA (+12V), 10mA (-12V) and 7mA (+5V) in RS-232 mode only;

5mA (+12V), 7mA (-12V) and 56mA (+5V) in RS-422 mode only;

12mA (+12V), 14mA (-12V) and 31mA (+5V) in RS-232 and RS-422 modes;

RS-232 loads 3k

Ω, 2500pF, 20kHz; RS-422 outputs across 100Ω, 500kHz.

6.

In Loopback mode, the external voltage input to the receiver must not exceed

±10V, otherwise

the loopback test may be adversely affected.

RS-422 Driver

2V

GND

5V

GND

–5V

T

IN

T

OUT

500kHz

5V

GND

10V

GND

–10V

T

IN

T

OUT

20kHz

RS-232 Driver

RS-422 Receiver

500kHz

2V

GND

–2V

5V

GND

R

IN

R

OUT

20kHz

5V

GND

–5V

5V

GND

R

IN

R

OUT

RS-232 Receiver

TYPICAL PERFORMANCE CURVES