SRC4392IPFBT datasheet(44/95 Pages) TI2

44 / 95 page

(1)ToshibaTORX173,TORX176,TORX179,orequivalent.

+5V

SN74LVC1G125

orEquivalent

0.1mF

T RX+

ToRX-

All-Plastic

(5or10metersmaximum)

Optical

Receiver

(1)

VDD33

0.1 F

ToRX+

ToRX-

All-Plastic

(5or10metersmaximum)

(1)ToshibaTORX141orequivalent.

Optical

Receiver

(1)

SRC4392

SBFS029D – DECEMBER 2005 – REVISED DECEMBER 2012

www.ti.com

Optical interfaces utilizing all-plastic fiber are commonly employed for consumer audio equipment where

interconnections are less than 10m in length. Optical receiver modules utilized for a digital audio interface

operate from either a single +3.3V or +5V supply and have a TTL-, CMOS-, or low-voltage CMOS-compatible

logic output. Interfacing to +3.3V optical receivers is straightforward when the optical receiver supply is powered

from the SRC4392 VDD33 power source, as shown in Figure 85. For the +5V optical receivers, the output high

logic level may exceed the SRC4392 line receiver absolute maximum input voltage. A level translator is required,

placed between the optical receiver output and the SRC4392 line receiver input. Figure 86 shows the

recommended input circuit when interfacing a +5V optical receiver to the SRC4392 line receiver inputs. The

Texas Instruments SN74LVC1G125 single buffer IC is operated from the same +3.3V supply used for SRC4392

VDD33 supply. This buffer includes a +5V tolerant digital input, and provides the logic level translation required

for the interface.

Figure 85. Interfacing to a +3.3V Optical Receiver Module

Figure 86. Interfacing to a +5V Optical Receiver Module

Submit Documentation Feedback

Product Folder Links: SRC4392

SRC4392IPFBT Datasheet(PDF) 44 Page - Texas Instruments