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IDT821068

OCTAL PROGRAMMABLE PCM CODEC

Integrated Device Technology 

IDT821068 OCTAL PROGRAMMABLE PCM CODEC

INDUSTRIAL TEMPERATURE RANGE

PIN DESCRIPTION

Name

Type

GNDA1

GNDA2

GNDA3

GNDA4

GNDA5

-

GNDA6

GNDA7

GNDA8

GNDAS

-

GND12

GND34

GND56

-

GND78

GNDDP

-

VDDA12

VDDA34

VDDA56

-

VDDA78

VDDAS

-

VDD12

VDD34

VDD56

-

VDD78

VDDDP

-

VIN1-8

I

VOUT1-8

O

SI1_(1-8)

I

SI2_(1-8)

SB1_(1-8)

I/O

SB2_(1-8)

SO1_(1-8)

SO2_(1-8)

O

SO3_(1-8)

Pin Number

15

19

22

26

88

84

81

77

12

124

43

107

60

59

17

24

86

79

91

4

35

99

68

55

16, 18, 23, 25

87, 85, 80, 78

14, 20, 21, 27

89, 83, 82, 76

3, 11, 28, 36

100, 92, 75,67

2, 10, 29, 37

101, 93, 74,66

1, 9, 30, 38

102, 94, 73,65

128, 8, 31,39

103, 95,72, 64

127, 7, 32,40

104, 96,71, 63

126, 6, 33,41

105, 97,70, 62

125, 5, 34,42

106, 98,69, 61

DX1/DU

O

46

DX2

O

49

DR1/DD

I

45

Description

Analog Ground.

All ground pins should be connected together.

Analog Ground For Bias.

All ground pins should be connected together.

Digital Ground.

All ground pins should be connected together.

Digital Ground For PLL.

All ground pins should be connected together.

+5V Analog Power Supply.

These pins should be connected to ground via a 0.1µF capacitor. All power supply pins should

be connected together.

+5V Analog Power Supply For Bias.

This pin should be connected to ground via a 0.1µF capacitor. All power supply pins should be

connected together.

+5V Digital Power Supply.

These pins should be connected to ground via a 0.1µF capacitor. All power supply pins should

be connected together.

+5V Digital Power Supply For PLL.

This pin should be connected to ground via a 0.1µF capacitance. All power supply pins should

be connected together.

Analog Voice Inputs.

These pins should be connected with the SLIC via a capacitor (0.22 µF).

Voice Frequency Receiver Outputs.

These pins can drive 300 Ω AC load. It allows the direct driving of transformer.

Debounced SLIC Signaling Inputs for Channel 1-8.

SLIC Signaling I/Os for Channel 1-8.

SLIC Signaling Outputs for Channel 1-8.

Transmit PCM Data Output (For MPI)/GCI Data Upstream (For GCI).

In MPI mode, this pin remains high-impedance until a pulse appears on FS input. PCM data

can output from DX1 or DX2 as selected by serial port, following the BCLK.

In GCI mode, GCI data is serially transmitted on this pin for all 8 channels of IDT821068.

Which part of the GCI data will be occupied is determined by CCLK/TS pin.

Transmit PCM Data Output (For MPI).

This pin remains high-impedance until a pulse appears on FS input. PCM data can output

from DX1 or DX2 as selected by serial port.

This pin is not used in GCI mode.

Receive PCM Data Input (For MPI)/GCI Data Downstream (For GCI).

In MPI mode, PCM data is shifted into DR1 or DR2 following the BCLK. PCM data can input

from DR1 and DR2 as selected by serial port.

In GCI mode, GCI data is received serially on this pin for all 8 channels of IDT821068. Which

part of the GCI data will be transmitted is determined by CCLK/TS pin.

3

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