Octal E1 Line Interface — LXT381

Datasheet

11

108

109

B13

B12

TPOS4

TNEG4

DI

DI

Transmit Positive Data Input.

Transmit Negative Data Input.

110

A14

RCLK4

DO

Receive Clock Output.

111

112

A13

A12

RPOS4

RNEG4

DO

DO

Receive Positive Data Output.

Receive Negative Data Output.

113

E11

ALOS4

DO

Analog Loss of Signal Output.

114

E14

OE

DI

Output Driver Enable Input.

If this pin is asserted Low all analog driver outputs immediately enter a high

impedance mode to support redundancy applications without external

mechanical relays. All other internal circuitry stays active.

115

E13

RPOL

DI

Receive Polarity Select Input. Determines RPOS/RNEG polarity.

RPOS/RNEG are active High output polarity when RPOL is High and

active Low polarity when RPOL is Low.

116

A11, B11

TVCC4

S

Transmit Driver Power Supply. Power supply pin for the output driver.

117

118

B10

A10

TTIP4

TRING4

AO

AO

Transmit Tip Output.

Transmit Ring Output.

119

A9, B9

TGND4

S

Transmit Driver Ground. Ground pin for the output driver.

120

121

A8

B8

RTIP4

RRING4

AI

AI

Receive Tip Input.

Receive Ring Input.

122

C9, D9

TGND5

S

Transmit Driver Ground. Ground pin for the output driver.

123

124

C10

D10

TRING5

TTIP5

AO

AO

Transmit Ring Output.

Transmit Tip Output.

125

C11, D11

TVCC5

S

Transmit Driver Power Supply. Power supply pin for the output driver.

126

127

D8

C8

RRING5

RTIP5

AI

AI

Receive Ring Input.

Receive Tip Input.

128

C4, D4

TVCC6

S

Transmit Driver Power Supply. Power supply pin for the output driver.

129

130

D5

C5

TTIP6

TRING6

AO

AO

Transmit Tip Output.

Transmit Ring Output.

131

C6, D6

TGND6

S

Transmit Driver Ground. Ground pin for the output driver.

132

133

D7

C7

RRING6

RTIP6

AI

AI

Receive Ring Input.

Receive Tip Input.

134

A6, B6

TGND7

S

Transmit Driver Ground. Ground pins for the output driver.

135

136

B5

A5

TTIP7

TRING7

AO

AO

Transmit Tip Output.

Transmit Ring Output.

137

A4, B4

TVCC7

S

Transmit Driver Power Supply. Power supply pin for the output driver.

138

139

B7

A7

RRING7

RTIP7

AI

AI

Receive Ring Input.

Receive Tip Input.

140

E4

ALOS7

DO

Analog Loss of Signal Output.

Table 1.

LXT381 Pin Description (Continued)

Pin #

LQFP

Pin #

PBGA

Symbol

Description

1. DI: Digital Input; DO: Digital Output; DI/O: Digital Bidirectional Port; AI: Analog Input; AO: Analog Output S: Power Supply;

N.C.: Not

Connected.