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PDF LR38580 Data sheet ( Hoja de datos )
| Número de pieza | LR38580 | |
| Descripción | Single-chip Driver IC for 270 k/320 k-pixel B/W CCDs with Dual-power-supply Operation | |
| Fabricantes | Sharp | |
| Logotipo |  |
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LR38580
LR38580
Single-chip Driver IC for 270 k/320 k-pixel
B/W CCDs with Dual-power-supply Operation
DESCRIPTION
The LR38580 is a CMOS single-chip driver IC which
generates timing pulses for driving 270 k/320 k-
pixel B/W CCD area sensors with a dual-power-
supply 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
48-PIN QFP
TOP VIEW
48 47 46 45 44 43 42 41 40 39 38 37
TST1 1
EEST 2
WIND 3
VRI 4
TST2 5
TST3 6
GND 7
VDD 8
CSYN 9
CBLK 10
OBCP 11
HBLK 12
36 EENR
35 EEUD
34 EEMD
33 VD
32 HD
31 GND
30 VDD
29 ACLX
28 TVMD
27 TST5
26 OSCO
25 OSCI
13 14 15 16 17 18 19 20 21 22 23 24
(QFP048-P-0707)
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
1 page  
LR38580
PIN NO. SYMBOL I/O POLARITY
PIN NAME
26 OSCO OSC3M – Clock output
27 TST5
ICD – Test pin 5
28 TVMD
TV mode selection
ICU –
input
29 ACLX
30 VDD
31 GND
32 HD
33 VD
34 EEMD
35 EEUD
36 EENR
ICU – All clear input
– – Power supply
– – Ground
Horizontal drive
O
pulse output
Vertical drive pulse
O
output
Electronic exposure
ICU – and WIND pulse
control input 2
Electronic exposure
IC –
control input 2
Electronic exposure
IC –
control input 3
DESCRIPTION
An output pin for reference clock oscillation.
The output is the inverse of OSCI (pin 25).
A test pin. Set open or to L level in the normal mode.
An input pin to select TV standards.
L level
: EIA mode
H level or open : CCIR mode
An input pin for resetting all internal circuits at power on.
Connect VDD through the diode and GND through the
capacitor.
Supply of +5 V power.
A grounding pin.
The pulse occurs at the start of every line.
The pulse occurs at the start of every field.
An input pin to control electronic exposure mode, flicker-
less mode and WIND (pin 3) pulse output, used with
FLMD (pin 13).
An input pin to control electronic exposure.
EEUD EENR
Shutter Speed
HL
up
HH
control stopped
LH
down
37 SMAX
Shutter speed
ICU –
control input 1
An input pin to control maximum and initial shutter
speed with STSL (pin 40).
SMAX STSL Maximum speed Initial Speed
H H ∏ 1/ 32 000 ∏ 1/ 1 000
L H ∏ 1/ 56 000 ∏ 1/ 1 000
H L ∏ 1/101 000 ∏ 1/ 1 000
L L ∏ 1/101 000 ∏ 1/101 000
38 FS
39 FCDS
40 STSL
O4MA2
CDS pulse output 1 A pulse to sample-hold the signal from CCD.
O4MA2
CDS pulse output 2 A pulse to clamp the feed-through level from CCD.
An input pin to control maximum and initial shutter
speed with SMAX (pin 37).
Shutter speed
ICU –
control input 2
SMAX STSL Maximum Speed
H H ∏ 1/ 32 000
L H ∏ 1/ 56 000
Initial Speed
∏ 1/ 1 000
∏ 1/ 1 000
H L ∏ 1/101 000 ∏ 1/ 1 000
L L ∏ 1/101 000 ∏ 1/101 000
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet LR38580.PDF ] | |
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