Sharp LR38580 Datasheet
DESCRIPTION
The LR38580 is a CMOS single-chip driver IC which
generates timing pulses for driving 270 k/320 kpixel B/W CCD area sensors with a dual-powersupply operation, synchronous pulses for TV
signals and processing pulses for video signals.
FEATURES
• Designed for 270 k/320 k-pixel B/W CCD area
sensors with a dual-power-supply operation
• Switchable between EIA and CCIR modes
• Electronic shutter and EE control are possible
• Maximum shutter speed is selectable from
approx. 1/100 000 s, 1/56 000 s and 1/32 000 s
• Starting shutter speed is selectable from approx.
1/100 000 s and 1/1 000 s
• Flicker-less function
• Switchable between normal and mirror images
• External synchronization is possible
• Level shifter for readout and shutter pulses included
• Dual +5 V and +12.5 V power supplies
• Package :
48-pin QFP (QFP048-P-0707) 0.5 mm pin-pitch
PIN CONNECTIONS
LR38580
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in
catalogs, data books, etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.
1
LR38580
Single-chip Driver IC for 270 k/320 k-pixel
B/W CCDs with Dual-power-supply Operation
1
48 47 46 45 44 43 42 41 40 39 38 37
13 14 15 16 17 18 19 20 21 22 23 24
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
TST
1
EEST
WIND
VRI
TST
2
TST3
GND
V
DD
CSYN
CBLK
OBCP
HBLK
EENR
EEUD
EEMD
VD
HD
GND
V
DD
ACLX
TVMD
TST
5
OSCO
OSCI
FLMD
MIR
V
DD
V1V2V3
V4
TST4
GND
VTG
V
DD12
OFD
GND
TST
6
FH1B
FH1
VDD
FH2
FH2BFRSTSL
FCDSFSSMAX
48-PIN QFP
TOP VIEW
(QFP048-P-0707)
LR38580
2
BLOCK DIAGRAM
EENR
EEUD
EEMD
VD
HD
GND
V
DD
ACLX
TVMD
TST5
OSCO
OSCI
TST
1
EEST
WIND
VRI
TST
2
TST3
GND
V
DD
CSYN
CBLK
OBCP
HBLK
OFD
V
DD12
VTG
GND
TST
4
VDD
MIR
FLMD
SMAX
FCDS
STSL
FH
2B
FH1B
TST6
GND
H/L JUDGE
SHUTTER
UP/DOWN
CONTROL
SHUTTER
SPEED
CONTROL
MIX
MIX
1/2
1/4
RESET
DECODER
DECODER
H COUNTER 2
V COUNTERH COUNTER 1
OSC
LEVEL
SHIFTER
LEVEL
SHIFTER
V
4
V3
V2
V1
FS
FR
FH
2
VDD
FH1
123456789101112
24
23
22
21
20
19
18
17
16
15
14
13
36
37
38
39
40
41
42
43
44
45
46
47
48
35 34 33 32 31 30 29 28 27 26 25
1/2
LR38580
3
PIN DESCRIPTION
PIN NO.
SYMBOL I/O
POLARITY
PIN NAME DESCRIPTION
1 TST
1 ICD – Test pin 1 A test pin. Set open or to L level in the normal mode.
2 EEST ICU –
Electronic exposure
control input 1
An input pin to control electronic exposure using EEUD
(pin 35) and EENR (pin 36).
L level : Electronic exposure is stopped.
H level or open : Electronic exposure is operated.
3 WIND
ON
N-ch
Open
Drain
Window pulse output
An output pin for window pulse.
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 V
DD with R (≥ 47 k$).
4 VRI ICSU – Vertical reset input
An input pin for resetting internal vertical counter.
The input pulse is VSYNC (negative polarity).
5 TST
2 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.
8V
DD – – Power supply Supply of +5 V power.
9 CSYN O
Composite
synchronizing pulse
output
An output pin of composite synchronous signal pulse.
10 CBLK O
Composite blanking
pulse output
An output pin of composite blanking pulse.
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
pulse output
A pulse that corresponds to the cease period of the
horizontal transfer pulse.
FLMD
EEMD
WIND
L
L
WIND1 (vertical pulse)H
L
L
H
H
H
WIND2 (composite pulse)
()
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