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SN28837 Datasheet(PDF) 1 Page - Texas Instruments

Part No. SN28837
Description  1/2-INCH PAL TIMER
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN28837
1/2-INCH PAL TIMER
SOCS031B – JULY 1991
Copyright
© 1991, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PAL-Timing Operation
Solid-State Reliability
Color and Monochrome Operation
Five Selectable-Antiblooming Modes
Variable-Integration-Time Option
Surface-Mount Package
Clamp-Pulse Select Option
Horizontal and Vertical Resets for External
Synchronization
description
The SN28837 is a monolithic integrated circuit
designed to supply timing signals for the Texas
Instruments (TI
™) 8-mm-diagonal TC276 (PAL
color) and TC277 (PAL monochrome) CCD image
sensors. The SN28837 supplies both CCD-drive
signals
and
PAL-television
synchronization
signals at standard video rates. It requires a
single 5-V supply voltage and a 13.37-MHz
crystal-oscillator input. The SN28837 provides the
user with several options including multiple
antiblooming modes, variable-integration time,
external synchronization, clamp-pulse selection,
and delayed horizontal transfer.
The SN28837 is designed to drive the CCD image sensor through intermediary level-shifting devices such as
the TI TMS3473B parallel driver and the SN28846 serial driver. It also supplies sample-and-hold signals for the
TI TL1593 3-channel sample-and-hold circuit and multiplex signals for the TI TL1051 video preprocessor. In
color applications, the SN28837 interfaces with the SN28838 color-subcarrier generator to generate the PAL
color subcarrier.
The SN28837 is supplied in a 60-pin plastic flat package and is characterized for operation from –20
°C to 45°C.
This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These
circuits have been qualified to protect this device against electrostatic discharges (ESD) of up to 2 kV according to MIL-STD-883C,
Method 3015; however, precautions should be taken to avoid application of any voltage higher than maximum-rated voltages to these
high-impedance circuits. During storage or handling, the device leads should be shorted together or the device should be placed in
conductive foam. In a circuit, unused inputs should always be connected to an appropriate logic voltage level, preferably either VCC or ground.
Specific guidelines for handling devices of this type are contained in the publication
Guidelines for Handling Electrostatic-Discharge-Sensitive
(ESDS) Devices and Assemblies available from Texas Instruments.
TI is a trademark of Texas Instruments Incorporated.
VCC
VCC1
X2
X1
GND
VCC
PI
ABIN
GT
PS
NC
S3
S2
S1
T
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
BCP1
BCP2
CP1
CP2
CSYNC
CBLK
BF
VD
SCBLK
IDP
HGATE
TESTA
FI
SFI
NC
17 18 19 20 21 22 23 24 25 26 27 28 29
59 58 57 56 55 54 53 52 51 50 49 48 47
16
30
46
60
FS PACKAGE
(TOP VIEW)
NC – No internal connection
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.




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