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ACS103

Acapella Optical Modem IC (3 Channel, Synchronous or Asynchronous Single Fiber Modem)

Semtech Corporation 

Matching Characteristics (for specified operating conditions)

Parameter

Crystal tolerance

use parallel resonate crystal and

recommended padding capacitors

Amplifier sensitivity input current

standard

double

Maximum amplifier input current

Symbol

Ct

Irec

Imax

Min

-100

650

500

30

Typ

0

500

300

50

Rtrc placed between TRC and GND

Rtrc

0

-

LED current

2

with TRC floating:

peak current

average curent

(Note 4)

LED capacitance

with Vr = 0 Volts

(Note 5)

Icur

70

-

14

-

Cled

-

-

LED leakage current

Vr = 1.8 Volts

Cl

-

1

LED reverse bias

Vr

1.3

1.5

Max

100

-

-

-

130

26

100

100

1.8

Units

ppm

nA

mA

Ω

mA

pF

nA

V

Note 4: The LED is switched on for approximately 1/5th of the time with a cycle of 160 µs at 9.216 MHz.

5: The ACS103 is at its best with low capacitance LEDs - Acapella is able to supply LEDs with lower than 20 pF capacitance.

For additional information, contact the following:

Semtech Corporation Advanced Communications Products

E-Mail: AdvCom@semtech.com

Internet: http://www.semtech.com

USA:

652 Mitchell Road, Newbury Park, CA 91320-2289

Tel: +1 805 498 2111, Fax: +1 805 498 3804

FAR EAST: 11F, No. 46, Lane 11, Kuang Fu North Road, Taipei, Taiwan, R.O.C.

Tel: +886 2 2748 3380, Fax: +886 2 2748 3390

EUROPE: Delta House, Chilworth Research Centre, Southampton, Hants, SO16 7NS, UK

Tel: +44 23 80 769008, Fax: +44 23 80 768612

ISO9001

CERTIFIED

Semtech reserves the right to change specifications on catalog devices without notice. © Copyright Semtech Corp 2000

ACS103 Issue 2.03 May 1996.

10

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