Note: All information contained in this data sheet has been carefully checked and is believed to be accurate as of the date of publication; however, this data sheet cannot be a “controlled document”. Current revisions, if any, to these

specifications are maintained at the factory and are available upon your request. We recommend checking the revision level before finalization of your design documentation.

© 2001 Elantec Semiconductor, Inc.

General Description

The EL4101C VFE (Video Front End) is designed to perform the basic

input processing functions in an analog video system as well as provide

analog input processing for digital video systems. The EL4101C VFE

contains a 4:1 MUX input and a DC-restore amplifier. The MUX input

can be used to select which input to use. The DC-restore allows the

input signal to be positioned to the correct voltage level for either ana-

log or digital processing. A buffered output of the MUX selection is

also available for use as a monitor output.

With a 500MHz bandwidth and only 40mA supply current, the

EL4101C is ideal for use in portable and fixed projectors, as well as

HDTV, DTV and other high performance video applications.

The EL4101C is available in the 24-pin QSOP package and is specified

for operation over the full -40°C to +85°C temperature range.

Connection Diagram

Note: Pin #6 should be a good high frequency ground

1

2

3

4

16

15

14

13

5

6

7

12

11

9

8

10

20

19

18

17

24

23

22

21

HOLD

GNDL2

IN0

VS1+

IN1

GNDI

IN2

VS1-

IN3

N.C.

D0

D1

CAP

DCREF

DCFDBK

VFDBK

VOUT

VS2+

VS2-

MOUT

MFDBK

GNDL

PDWN

N.C.

HPULSE

SIG0

+5V

SIG1

SIG2

-5V

SIG3

LOGICD0

LOGICD1

Video Out

Monitor Out

LOGICPD

0.33µF

DCV

+5V

-5V

Features

• 4:1 multiplexer with monitor out

• DC-restore amplifier

• ±5V operation

• 500MHz bandwidth

Applications

• HDTV/DTV analog inputs

• Video projectors

• Computer monitors

• Set top boxes

• Security video

• Broadcast video equipment

Ordering Information

Part No.

Package

Tape & Reel

Outline #

EL4101CU

24-Pin QSOP

MDP0040

EL4101C - Preliminary

500MHz Video Front End - 4:1MUX + DC-Restore