DS14185WM datasheet(5/8 Pages) NSC

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Pin Descriptions (Continued)

Pin #

Name

Description

−

Negative Power Supply Pin (−9.0

≤ V− ≤ −13.2)

Positive Power Supply Pin (+5V ±5%)

Applications Information

In a typical Data Terminal Equipment (DTE) to Data

Circuit-Terminating Equipment (DCE) 9-pin de-facto inter-

face implementation, 2 data lines and 6 control lines are re-

quired. The data lines are TXD and RXD. The control lines

are RTS, DTR, DSR, DCD, CTS, and RI.

The DS14185 isa3x5 Driver/Receiver and offers a single

chip solutuion for this DTE interface. As shown in

Figure 5,

this interface allows for direct flow-thru interconnect. For a

more conservative design, the user may wish to insert

ground traces between the signal lines to minimize cross

talk.

LapLink COMPATIBILITY

The DS14185 can easily provide 128 kbps data rate under

maximum driver load conditions of C

L = 2500 pF and RL = 3

Ω, while power supplies are:

CC = 4.75V, V

+ = 10.8V, V− = −10.8V

MOUSE DRIVING

A typical mouse can be powered from the drivers. Two driver

outputs connected in parallel and set to V

OH can be used to

supply power to the V

+ pin of the mouse. The third driver out-

put is set to V

OL to sink the current from the V

− terminal. Re-

fer to typical curves of V

OUT/IOUT.Typical mouse specifica-

tions are:

10 mA at +6V

5mA at−6V

DS011938-7

FIGURE 5. Typical DTE Application

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