LR38580 View Datasheet(PDF) - Sharp Electronics

Part Name

Description

View to exact match

LR38580

Single-chip Driver IC for 270 k/320 k-pixel B/W CCDs with Dual-power-supply Operation

Sharp Electronics 

LR38580

PIN DESCRIPTION

PIN NO. SYMBOL I/O POLARITY

PIN NAME

DESCRIPTION

1 TST1

ICD – Test pin 1

A test pin. Set open or to L level in the normal mode.

An input pin to control electronic exposure using EEUD

2 EEST

Electronic exposure (pin 35) and EENR (pin 36).

ICU –

control input 1

L level

: Electronic exposure is stopped.

H level or open : Electronic exposure is operated.

An output pin for window pulse.

FLMD EEMD

WIND

L

L

H

L WIND1 (vertical pulse)

3 WIND

ON

( )N-ch

Open

Drain

L

H

H

H WIND2 (composite pulse)

Window pulse output WIND1 : When connected to EEST (pin 2), the

operation of electronic exposure can be

stopped at the upper side of monitor.

WIND2 : A pulse that picks out the center of CCD output.

At this time, set H level or open at EEST (pin 2).

As the output circuit of WIND is N-ch open

drain, connect to VDD with R (≥ 47 k$).

4 VRI

ICSU

An input pin for resetting internal vertical counter.

– Vertical reset input

The input pulse is VSYNC (negative polarity).

5 TST2

ICD – Test pin 2

A test pin. Set open or to L level in the normal mode.

6 TST3

ICD – Test pin 3

A test pin. Set open or to L level in the normal mode.

7 GND

–

– Ground

A grounding pin.

8 VDD

–

– Power supply

Supply of +5 V power.

Composite

9 CSYN

O

synchronizing pulse An output pin of composite synchronous signal pulse.

output

10 CBLK

O

Composite blanking

An output pin of composite blanking pulse.

pulse output

11 OBCP

O

Optical black clamp

pulse output

A pulse to clamp the optical black signal. This pulse

stays low during the absence of effective pixels within

the vertical blanking.

12 HBLK

O

Horizontal blanking A pulse that corresponds to the cease period of the

pulse output

horizontal transfer pulse.

3

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