ACS103 データシートの表示（PDF） - Semtech Corporation

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ACS103

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

Semtech Corporation 

Link Budget Examples

Cable

Typical transmit couple power to fiber (µW)

Minimum LED responsivity (A/W)

Available current (µA)

200 micron

1200

0.05

60

100 micron

260

0.06

15.6

62.5 micron 50 micron

100

40

0.1

0.12

10

4.8

Minimum ACS103 sensitivity (nA)

650

650

650

650

Link Budget (dB)

20

14

12

8

Above examples using nominal "B" spec. LED diodes. "A" spec. LEDs offer superior performance, e.g. > 12 dB link budget

on 50 µm fiber. "A" spec. LEDs are available from Acapella.

Absolute Maximum Ratings

2

Parameter

Power supply VD+ and VA+

(VDD = VD+ or VA+)

Input voltage

(non-supply pins)

Input current

(except LDN,LDP,CNT,VG)

Input current

( LDN,LDP,CNT)

Symbol

VDD

Vin

Iin

Iin

Min

-0.3

GND - 0.3

-

-

Max

6.0

VDD + 0.3

10.0

1.0

Units

V

V

mA

mA

Storage temperature

Tstor

-50

160

ºC

Operating Conditions

Parameter

Power supply

(VA+ and VD+)

Ambient temperature range

Symbol

V+

TA

Min

4.75

-40

Typ

5.0

-

Max

5.25

85

Units

V

ºC

Static Digital Input Characteristics (for specified operating conditions)

Input pins: DR 1/2/3/4 , DM 1/2/3, SEL, CKC, RSS, TXD1/2/3, RTS, DTR, XI3, XTI, PORB,

TxCL(input).

Parameter

Symbol

Min

Typ

Max

Units

Vin High (except PORB)

Vih

2.0

-

-

V

Vin Low (except PORB)

Vil

-

-

0.8

V

Vin High (PORB)

Vih

0.8 * VD+

-

-

V

Vin Low (PORB)

Vil

-

-

0.2 * VD+

V

Pull-up resistor

(except XTI and TxCL)

PU

50k

125k

340k

Ω

Input current (Note 1)

Iin

-

-

100

µA

Note 1: Input current is mainly attributed to pull-up resistor, so it applies when input is Low. The High input current is < +/-10 µA.

ACS103 Issue 2.03 May 1996.

8

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