Description
The CXD1257AR generates the timing pulses
required by the CCD image sensors as well as signal
processing circuits.
Features
· NTSC and PAL compatible
· Electronic shutter function
· H-driver
· Compatible with digital and analog camera systems
· Standby function
Applications
CCD cameras
Structure
Silicon gate CMOS IC
Applicable CCD Image Sensors
ICX026CKA, ICX027CKA
ICX054AK, ICX055AK
ICX056AK
Absolute Maximum Ratings (Ta = 25°C)
· Supply voltage
V
DD
Vss 0.5 to +7.0
V
· Input voltage
V
I
Vss 0.5 to V
DD
+ 0.5 V
· Output voltage
V
O
Vss 0.5 to V
DD
+ 0.5 V
· Operating temperature Topr
20 to +75
°C
· Storage temperature
Tstg
55 to +150
°C
Recommended Operating Conditions
· Supply voltage
V
DD
5.0 ± 0.25
V
· Operating temperature Topr
20 to +75
°C
1
CXD1257AR
E91817B4X-PK
CCD Camera Timing Generator
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
64 pin LQFP (Plastic)
8
15 16 17 18 19 20
21
24 25
28 40
56
4
5
6
7
9
11
12
13
14
23
36
61
22
37
41
42
43
44
45
46
57
59
60
62
GATE
1/2
SYNC
GEN
3
10
26 27
29
30
39
38
35
34
31 32 33
47 48 49 50 51 52 53
54
55
58
2
64
1
ADR . COUNT
H ROM
LATCH
ADR . COUNT
V ROM
LATCH
ADR . COUNT
ROG ROM
LATCH
MODE
SET
GATE
GATE
DRIVER
GATE
SHUT
ROM
63
V
SS
V
DD
HTSG
VD INITIALIZE
HD INITIALIZE
HIGH-SPEED
PULSE
GENERATION
CIRCUIT
DECODER
COUNTER
MICROCOMPUTER
CONTROLLER
DECODER
Block Diagram
2
CXD1257AR
Pin Description
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
OSCO
OSCI
EF
ED0
ED1
ED2
SMD1
Vss
SMD2
XVCT
D1
D2
D3
D4
A5
A4
A3
A0
A1
A2
Vss
RG
NC
V
DD
V
DD
H1
H2
Vss
XSUB
XV2
XV1
XSG1
XV3
XSG2
XV4
O
I
I
I
I
I
I
--
I
O
I
I
I
I
O
O
O
O
O
O
--
O
--
--
--
O
O
--
O
O
O
O
O
O
O
Inverter output for oscillation.
Inverter input for oscillation.
Not used. (With pull-up resistor)
Shutter speed setting. Strobe input for serial mode. (With pull-up resister)
Shutter speed setting. Clock input for serial mode. (With pull-up resister)
Shutter speed setting. Data input for serial mode. (With pull-up resister)
Shutter mode setting. (With pull-up resister)
GND
Shutter mode setting. (With pull-up resister)
Not used. (Open)
Fix at Low in normal operation. (With pull-down resister)
Fix at Low in normal operation. (With pull-down resister)
Fix at Low in normal operation. (With pull-down resister)
Low: NTSC, High: PAL. (With pull-down resister)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
Not used. (Open)
GND
Reset gate pulse output.
Power supply.
Power supply for H1 and H2.
Clock output for CCD horizontal register drive.
Clock output for CCD horizontal register drive.
GND for H1 and H2.
CCD discharge pulse output.
Clock output for CCD vertical register drive.
Clock output for CCD vertical register drive.
CCD sensor charge readout pulse output.
Clock output for CCD vertical register drive.
CCD sensor charge readout pulse output.
Clock output for CCD vertical register drive.
Symbol
I/O
Description
3
CXD1257AR
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
TEST2
MCK
XSHP
XSHD
Vss
XSP1
XSP2
XSH1
XSH2
XDL1
XDL2
BFG
CLP1
CLP2
CLP3
CLP4
PBLK
ID
WEN
GM
V
DD
CL
PS
HD
VD
HTSG
TEST
XCK
CK
I
O
O
O
--
O
O
O
O
O
O
O
O
I/O
I/O
O
O
O
O
I
--
O
I
I
I
I
I
O
I
Test input. Set at Low in normal operation.
NTSC: 1820f
H
/3, PAL: 1816f
H
/3. Output.
Precharge level sample-and-hold pulse.
Data sample-and-hold pulse.
GND
Color separation sample-and-hold pulse.
Color separation sample-and-hold pulse.
Switching sample-and-hold pulse.
Switching sample-and-hold pulse.
Delay line clock output.
Delay line clock output.
Pulse output for chroma modulator in encoder.
Clamp pulse output.
Clamp pulse output. When GM is set at High, standby mode switching input.
Clamp pulse output. When GM is set at High, standby mode switching input.
Clamp pulse output.
Blanking cleaning pulse output.
Line identification output.
Write enable output for low-speed shutter operation.
Low: Analog signal processing, High: Digital signal processing. (With pull-down resister)
Power supply.
NTSC: 910f
H
, PAL: 908f
H
. Clock output.
Switching for electronic shutter speed input method. (With pull-up resister)
Low: Serial input, High: Parallel input.
Horizontal synchronizing signal input.
Vertical synchronizing signal input. (During Low, 9H for NTSC and 7.5H for PAL)
Control input for XSG1 and XSG2. (With pull-up resistor)
Low: XSG1, XSG2 halted, High: XSG1, XSG2 generated.
Test input. Set at Low in normal operation. (With pull-down resister)
NTSC: 1820f
H
, PAL: 1816f
H
. Clock output.
NTSC: 1820f
H
, PAL: 1816f
H
. Clock input.
Pin
No.
Symbol
I/O
Description
4
CXD1257AR
Electrical Characteristics
DC Characteristics
(V
DD
= 5V ± 0.25V, Topr = 20 to +75°C)
Item
Supply voltage
V
DD
V
IH1
V
IL1
V
IH2
V
IL2
V
OH1
V
OL1
V
OH2
V
OL2
V
OH3
V
OL3
V
OH4
V
OL4
R
FB
R
PU
R
PD
I
OH
= 2mA
I
OL
= 4mA
I
OH
= 4mA
I
OL
= 8mA
I
OH
= 8mA
I
OL
= 8mA
I
OH
= 1mA
I
OL
= 1mA
V
IN
= Vss or V
DD
V
IL
= 0V
V
IH
= V
DD
4.75
0.7V
DD
2.2
V
DD
0.5
V
DD
0.5
V
DD
0.5
V
DD
/2
500k
40k
40k
5.0
2M
100k
100k
5.25
0.3V
DD
0.8
0.4
0.4
0.4
V
DD
/2
5M
250k
250k
V
V
V
V
V
V
V
V
V
V
V
V
V
Input voltage 1
(Input pins other than those below)
Input voltage 2
(Pins 59 and 60)
Output voltage 1
(Output pins other than those below)
Output voltage 2
(Pins 22, 37, 38, 39, 57, and 63)
Output voltage 3
(Pins 26 and 27)
Output voltage 4
(Pin 1)
Feedback resister
Pull-up resister
Pull-down resister
Symbol
Conditions
Min.
Typ.
Max.
Unit
I/O Pin Capacitances
(V
DD
= V
I
= 0V, f
M
= 1MHz)
Item
Input pin capacitance
Output pin capacitance
I/O pin capacitance
C
IN
C
OUT
C
I/O
9
11
11
pF
pF
pF
Symbol
Min.
Typ.
Max.
Unit
5
CXD1257AR
Description of Operation
1. Mode Control
Symbol
GM
PS
EF
HTSG
D1
D2
D3
D4
55
58
3
61
11
12
13
14
Analog signal processing
Digital signal processing
Serial shutter
Parallel shutter
speed setting
speed setting
Fix at High in normal operation
XSG1, 2
XSG1, 2
OFF
ON
Fix at Low in normal operation
Fix at Low in normal operation
Fix at Low in normal operation
NTSC
PAL
Pin No.
L
H
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