SN65ELT20D datasheet(3/12 Pages) TI

Part #	SN65ELT20D

Description	5-V TTL-to-Differential PECL Translator

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Manufacturer	TI [Texas Instruments]

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PECL DC CHARACTERISTICS

(1) (V

CC = 5 V; GND = 0 V)

(2)

TTL INPUT DC CHARACTERISTICS

(1) (V

CC = 4.2 V to 5.7 V; TA = –40°C to 85°C)

AC CHARACTERISTICS

(1) (V

CC = 4.2 V to 5.7 V; GND = 0 V)

SN65ELT20

www.ti.com............................................................................................................................................................................................ SLLS922 – DECEMBER 2008

–40°C

25°C

85°C

PARAMETER

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

ICC

Power-supply current

9.6

16

10.1

16

10.7

16

mA

VOH

Output HIGH voltage(3)

3915

3958

4120

3915

3963

4120

3915

3967

4120

mV

VOL

Output LOW voltage (3)

3170

3247

3380

3170

3244

3380

3170

3244

3380

mV

(1)

The device meets these specifications after thermal equilibrium has been established when mounted in a test socket or printed-circuit

board with maintained transverse airflow greater than 500 lfpm (2.54 m/s). Electrical parameters are assured only over the declared

operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit

values are applied individually under normal operating conditions and are not valid simultaneously.

(2)

Output parameters vary 1:1 with Vcc.

(3)

Outputs are terminated through a 50-

Ω resistor to VCC – 2 V.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IIH

VIN = 2.7 V

20

Input HIGH current

µA

IIH

VIN = VCC

20

IIL

Input LOW current

VIN = 0.5 V

–0.6

mA

VIK

Input clamp diode voltage

IIN = –18 mA

–1.2

V

VIH

Input HIGH voltage

2

V

VIL

Input LOW voltage

0.8

V

(1)

The device meets these specifications after thermal equilibrium has been established when mounted in a test socket or printed-circuit

board with maintained transverse airflow greater than 500 lfpm (2.54 m/s). Electrical parameters are assured only over the declared

operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit

values are applied individually under normal operating conditions and are not valid simultaneously.

–40°C

25°C

85°C

PARAMETER

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

fMAX

Maximum switching frequency(2) (See

400

430

MHz

Figure 4.)

tPLH

Propagation delay, 1.5 V to 50% (see Figure 2)

0.9

1.25

0.9

1.25

0.9

1.25

ns

tPHL

Propagation delay, 1.5 V to 50% (see Figure 2)

0.7

1.2

0.7

1.2

0.7

1.2

ns

tJITTER

Random clock jitter (RMS)

0.5

ps

Q-output rise/fall times (20%–80%) (see

1.5

1

1.5

1

tr/tf

1

1.5

ns

Figure 3)

(1)

The device meets these specifications after thermal equilibrium has been established when mounted in a test socket or printed-circuit

board with maintained transverse airflow greater than 500 lfpm (2.54 m/s). Electrical parameters are assured only over the declared

operating temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit

values are applied individually under normal operating conditions and are not valid simultaneously.

(2)

Maximum switching frequency is measured at an output amplitude of 300 mVPP.

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