TLC32044C, TLC32044E, TLC32044I, TLC32044M, TLC32045C, TLC32045I

VOICE-BAND ANALOG INTERFACE CIRCUITS

SLAS017F − MARCH 1988 − REVISED MAY 1995

26

POST OFFICE BOX 655303

noise (measurement includes low-pass and bandpass switched-capacitor filters)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

TLC32044C, E, I

550

µV rms

TLC32044M

With sin x / x correction

575

µV rms

TLC32045C, I

With sin x / x correction

600

µV rms

Transmit noise

TLC32044C, E, I

DX input = 00 00 00 00 00 00 00,

325

425

µV rms

Transmit noise

TLC32044M

DX input = 00 00 00 00 00 00 00,

constant input code

325

450

µV rms

TLC32045C, I

Without sin x / x correction

constant input code

450

µV rms

TLC32044C, E, I

Without sin x / x correction

18

dBrncO

TLC32045C, I

24

dBrncO

TLC32044C, E, I, M

300

500

µV rms

Receive noise

TLC32045C, I

Inputs grounded, gain = 1

530

µV rms

Receive noise

(see Note 10)

TLC32044C, E, I, M

Inputs grounded, gain = 1

18

dBrncO

(see Note 10)

TLC32045C, I

24

dBrncO

NOTE 10: The noise is computed by statistically evaluating the digital output of the A/D converter.

timing requirements

serial port recommended input signals

MIN

MAX

UNIT

Master clock cycle time

95

ns

Master clock cycle time, TLC32044M

100

192

ns

Master clock rise time

10

ns

Master clock fall time

10

ns

Master clock duty cycle

25%

75%

Master clock duty cycle, TLC32044M

42%

58%

RESET pulse duration (see Note 11)

800

ns

DX setup time before SCLK

↓

20

ns

DX setup time before SCLK

↓, TLC32044M

28

ns

DX hold time after SCLK

↓

ns

NOTE 11: RESET pulse duration is the amount of time that the reset pin is held below 0.8 V after the power supplies have reached their

recommended values.