SN65EPT21

www.ti.com

SLLS970 – NOVEMBER 2009

PECL DC CHARACTERISTICS

At VCC = 3.3 V, GND = 0.0 V (unless otherwise noted)

(1) (2)

TA = –40°C

TA = 25°C

TA = 85°C

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

VIH

High-level input voltage,

2075

2420

2075

2420

2075

2420

mV

single-ended

VIL

Low-leveI input voltage,

1355

1675

1355

1675

1355

1675

mV

single-ended

VBB

Output reference voltage

1910

2009

2160

1910

2034

2160

1910

2026

2160

mV

VIHCM

High-level input voltage,

See (3)

1.2

3.3

1.2

3.3

1.2

3.3

V

R

common-mode range,

differential

IIH

High-level input current

150

150

150

μA

IIL

Low-level input current

-150

-150

-150

μA

(1)

The device will meet the specifications after thermal balance has been established when mounted in a socket or printed circuit board

with maintained transverse airflow greater than 500 lfpm. 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 not valid simultaneously.

(2)

Input parameters vary 1:1 with VCC.

(3)

VIHCMR(min) varies 1:1 with GND, VIHCMR(max) varies 1:1 with VCC. VIHCMR range is referenced to the most positive side of the differential

input signal

TTL DC CHARACTERISTICS

At VCC = 3.3 V, GND = 0.0, TA = –40°C to 85°C (unless otherwise noted)

(1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ICCH

Power supply current

Output is HIGH

5

9

20

mA

ICCL

Power supply current

Output is LOW

8

7.5

26

mA

VOH

High-level output voltage

IOH = –3.0 mA

2.4

3.05

V

VOL

Low-level output voltage

IOL = 24 mA

0.32

0.5

V

IOS

Output short circuit current

–180

–100

–80

mA

(1)

The device will meet the specifications after thermal balance has been established when mounted in a socket or printed circuit board

with maintained transverse airflow greater than 500 lfpm. 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 not valid simultaneously.

AC CHARACTERISTICS

At VCC = 3.0 V to 3.6 V, GND = 0.0 V (unless otherwise noted)

(1) (2)

TA = –40°C

TA = 25°C

TA = 85°C

PARAMETER

TEST CONDITIONS

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

fMAX

Maximum switching

300

300

300

MHz

frequency

(Figure 1–Figure 3)

tPLH

Propagation delay

At 1.5 V

1000

1394

1800

1000

1444

1800

1000

1481

1800

ps

tPHL

Propagation delay

At 1.5 V

1000

1140

1900

1000

1280

1900

1000

1421

1900

ps

tJITTER

Random clock jitter (RMS)

2.25

5

3.2

5

3.4

5

ps

tSKEW

Duty Cycle Skew(3)

94

250

78

250

62

250

ps

tSKPP

Part-to-Part Skew(3)

500

500

500

ps

VPP

Input swing

See (4)

150

1200

150

1200

150

1200

mV

tr/tf

Output rise/fall times

Q, Q (0.8V - 2.0V))

250

500

900

250

500

900

250

500

900

ps

(1)

The device will meet the 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. 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 not valid simultaneously.

(2)

RL = 500 Ω to GND and CL = 20 pF to GND. See Figure 4. Measured with 750mV, 50% duty cycle clock source

(3)

Skews are measured between outputs under identical transitions

(4)

VPP(min) is minimum input swing for which ac parameters are assured.

Copyright © 2009, Texas Instruments Incorporated

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