Datasheet SY100ELT982 Datasheet (MICREL)

PECL-TO-CML
TRANSLATOR
w/o ENABLE

PRELIMINARY

SY100ELT982

FEATURES

■ Up to 1.25Gbps operation

■ 25mA peak drive current

■ Adjustable output current

■ Separate output enable

■ Differential inputs for data

■ 75KΩ input pulldown resistor

■ Single power supply

■ Available in a tiny 10-pin (3mm) MSOP

PIN CONFIGURATIONS

V

/EN

D

/D

REF

SET

1

2

IN

3

IN

4

5

MSOP

K10-1

10

V

9

/OUT

8

OUT

7

GND
GNDR

6

CC

DESCRIPTION

The SY100ELT982 is a high speed PECL-to-CML
translator. The output current is DC current controlled by
IRSET, current through the resistor RSET. The output OUT
is LOW when output enable is HIGH.

The device incorporates complementary open collector
outputs with a capability of driving peak current of 25mA.

The SY100ELT982 utilizes the high performance
bipolar ASSET™ technology.

APPLICATIONS

■ Telecommunications

■ CML Output Oscillator

■ GaAS Interface

BLOCK DIAGRAM

D
D

EN

V

CC

R

TERM

OUT

IN
IN

Internal Logic

I

OUT

OUT

BIAS

V

REF

Control

Output Current

Control

R

SET

40X

V

CC

GND

V

EE

SET

R

Rev.: A Amendment: /1

1

Issue Date: July 2000

Micrel

PRELIMINARY

SY100ELT982

PIN NAMES TRUTH TABLE

Pin Function

V

CC Most positive power supply input, +5V for PECL

operation.
GND Ground
DIN, /DIN Differential PECL 100K compatible inputs.
/EN This PECL 100K compatible input enables data

translation. When Enable asserted HIGH,

OUT = IOUT, /OUT = 0mA.
OUT, /OUT Open collector outputs from the output

buffer drive these differential current outputs.
VREF Voltage reference for use with RSET.
RSET External resistor to adjust output current.

ABSOLUTE MAXIMUM RATINGS

(1)

D /D /EN OUT

LHLLH
HLLHL
XXHLH

NOTE:

1. L = LOW, H = HIGH, X = don't care

2. H = IOUT = 0mA

3. H = /I

OUT = 0mA

(1)

(2)

/OUT

(3)

Symbol Rating Value Unit

VCC Power Supply Voltage 0 to +7.0 V
VI Input Voltage 0 to +6.0 V
IO Output Current 25 mA
TA Operating Temperature Range 0˚C to +85˚C ˚C
Tstore Storage Temperature Range –55˚C to +125˚C ˚C

tot Power Dissipation 250 mW

P

NOTE:

1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. This is a stress rating only and functional operation is not implied
at conditions other than those detailed in the operational sections of this data sheet. Exposure to ABSOLUTE MAXIMUM RATlNG conditions for extended
periods may affect device reliability.

OPERATIONING CONDITIONS

(1)

Symbol Rating Value Unit

VCC Power Supply Voltage +4.5 to +5.5 V
RTERM Resistor to Terminate Outputs 10 to 50 Ω
RSET Resistor to Adjust Current 1500 to 50,000 Ω
ΘJA Thermal Resistance of Package to Ambient

OUT Capacitance on OUT + /OUT 2.5 typical pf

C

NOTES:

1. The voltage drop across RTERM should not be greater than 2V.

2. Still air without heatsink.

(2)

206 ˚C/W

2

PRELIMINARY

Micrel

SY100ELT982

DC ELECTRICAL CHARACTERISTICS

GND = 0V; VCC = +5.0V ±10%; TA = 0°C to + 85°C

TA = 0°CTA = +25°CTA = +85°C

Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit

IH Input HIGH Voltage VCC -1165 — VCC -880 VCC -1165 — VCC -880 VCC -1165 — VCC -880 mV

V

(Din, /Din, /EN)

IL Input LOW Voltage VCC -1810 — VCC -1475 VCC -1810 — VCC -1475 VCC -1810 — VCC -1475 mV

V

(Din, /Din, /EN)

VREF Reference Voltage — 3.12 ——3.00 ——2.80 — V

(2)

(1)

0.5 —— 0.5 —— 0.5 ——uA

— 16 25 — 16 25 — 16 25 mA

IL Input LOW Current

I

(Din, /Din, /EN)

I

IH Input HIGH Current ——100 ——100 ——100 uA

(Din, /Din, /EN)

ICC Supply Current

OL Output LOW Current ——500 ——500 ——500 uA

I

(/EN = HIGH)

OR Output Current ——10 ——10 ——10 %

I

Ringing

(2)

IGAIN IOUT/IRSET 30 38 44 30 38 44 30 38 44 —

NOTES:

1. VI = VIL(Min.)

2. IOH = 25mA.

AC ELECTRICAL CHARACTERISTICS

(1)

IOH =10mA; GND = 0V; VCC = +5V ±10%; TA = 0°C to + 85°C

TA = 0°CTA = +25°CTA = +85°C

Symbol Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Conditions

pd D Propagation Delay — 480 1000 — 480 1000 — 480 1000 ps

t

Din - OUT

pd EN Propagation Delay — 450 1000 — 450 1000 — 450 1000 ps

t

/EN - OUT

r Rise/Fall Time — 200 ——200 ——200 — ps

t
tf (20% to 80%)

IOUT Output Current 5 15 25 5 15 25 5 15 25 mA
IRSET Output Current Control 0.125 — 0.625 0.125 — 0.625 0.125 — 0.625 mA
I

OR Output Current ——10 ——10 ——10 %

Ringing

NOTES:

1. RTERM = 50Ω ±1%

2. IOH = 5 to 25mA

(2)

3

Micrel

APPLICATION EXAMPLE

PRELIMINARY

SY100ELT982

V

CC

50

D

IN

D

Logic LOW

to enable 1.5K

SY100ELT982

IN

EN

V

RET

PERFORMANCE CURVES

30

25

20

Typical

50

50

CML

50 coaxil

R

SET

50 coaxil

IO and R

SET

INPUT

DEVICE

Ex. EL16V

15

(mA)

O

I

10

5

0.0

0.0

2.0K

PRODUCT ORDERING CODE

Ordering Package Operating

Code Type Range

SY100ELT982KC K10-1 Commercial

4.0K

6.0K

SET

(ohm)

R

8.0K 10K

12K

4

Micrel

10 LEAD MSOP (K10-1)

PRELIMINARY

SY100ELT982

Rev. 00

MICREL-SYNERGY 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA

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© 2000 Micrel Incorporated

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