N.

Name

Type

Description

69

XTI

I

Crystal Oscillator Input. Crystal Oscillator Input drive

70

PGND

O

PLL Ground Input. Ground connection for Oscillator circuit

71

PVCC

I

PLL Power Supply Positive. Supply for PLL Clock Oscillator

72

XTO

O

Crystal Oscillator Output. Crystal Oscillator Output drive

73

ALE

O

EMI Address Latch Enable. This pin acts as the EMI Address Latch Enable for the

External Memory Interface

74

GND

I

Ground

75

DRDN

O

EMI Read Enable. This pin serves as the read enable for the EMI

76

EMI_AD0

I/O

EMI Multiplexed Address/Data Line 0. these pin acts as the EMI multiplexed

address and data line 0

77

EMI_AD1

I/O

EMI Multiplexed Address/Data Line 1. these pin acts as the EMI multiplexed

address and data line 1

78

EMI_AD2

I/O

EMI Multiplexed Address/Data Line 2. these pin acts as the EMI multiplexed

address and data line 2

79

EMI_AD3

I/O

EMI Multiplexed Address/Data Line 3. these pin acts as the EMI multiplexed

address and data line 3

80

EMI_AD4

I/O

EMI Multiplexed Address/Data Line 4. these pin acts as the EMI multiplexed

address and data line 4

RECOMMENDED DC OPERATING CONDITIONS

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Power Supply Volrage Range

3

3.3

3.6

V

Operating Junction Temp.

–40

125

°C

PIN FUNCTIONS (continued)

TDA7550R - TDA7550 - TDA7551 - TDA7552 - TDA7553

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