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Micrel, Inc.

3.3V 800MHz PRECISION PECL

AMPLIFIER WITH LOW-GAIN

FEEDBACK

Precision Edge

SY89207L

Precision Edge

廬

SY89207L

廬

s

3.0V to 3.8V power supply option

s

Guaranteed AC parameters over temperature:

鈥?f

MAX

= 800MHz

鈥?< 200ps differential propagation delay (D to Q

FB

)

鈥?< 730ps differential propagation delay (D to Q

HG

)

鈥?< 250ps t

r

/ t

f

s

Low-gain feedback path Q

FB

= +10V/V

s

V

BB

reference output voltage

s

Wide temperature range: 鈥?0

擄

C to +85

擄

C

s

Available in 10-pin (3mm

脳

3mm) MSOP

s

LVPECL/LVECL/CMOS compatible EN option

Precision Edge

廬

DESCRIPTION

The SY89207L is a differential receiver amplifier optimized

for crystal oscillator applications. The device includes an

additional low differential gain (+10V/V) output stage (Q

FB

)

ideal for feedback applications common in crystal oscillator

gain blocks. The SY89207L is fully differential, with a bandwidth

> 800MHz over temperature and voltage. For applications that

require output disable control, a LVPECL/LVECL/CMOS

compatible enable pin (EN) will force the differential output

into a fixed logic state. The SY89207L also includes a V

BB

reference voltage for single-ended or AC-coupled applications.

The SY89207L PECL logic is 100k ECL compatible.

Operation is guaranteed over the 鈥?0擄C to +85擄C temperature

range and 3.3V nominal supply voltage range.

All support documentation can be found on Micrel鈥檚 web

site at www.micrel.com.

APPLICATIONS

s

Oscillator timing modules

BLOCK DIAGRAM

Q

FB

/Q

FB

D

/D

V

BB

LEN

EN

Q

V

CC

Q

HG

/Q

HG

LATCH

D

V

EE

Precision Edge is a registered trademark of Micrel, Inc.

M9999-051805

hbwhelp@micrel.com or (408) 955-1690

Rev.: B

Amendment: /0

1

Issue Date: May 2005

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