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LM1247 Product Folder

150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs

Generic P/N 1247

Parametric Table

Temperature Min (deg C)	0000000000.0000
Temperature Max (deg C)	70
Gain Bandwidth (MHz)	150
Gain (V/V)	4.10
Channels (Channels)	3
Customizable OSD	Yes
ROM Characters ()	512
Output Rise Time (tr) (ns)	3.10
Output Fall Time (tf) (ns)	2.90
Supply Voltage (Volt)	5

Characters ()	254
2 Color ()	384
4 Color Fonts ()	128
FadeIn/FadeOut	No
Auto Sizing	No
Half Tone	No
Programmable Horizontal Blanking	No
Programmable Vertical Blank Pulse	Yes
Power Save	Yes

Datasheet

Title	Size in Kbytes	Date	View Online	Download	Receive via Email
LM1247 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs	3141 Kbytes	3-Dec-02	View Online	Download	Receive via Email

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Package Availability, Models, Samples & Pricing

Part Number

Package

Status

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking

Type

Pins

MSL/Lead-Free Availability

Lead
Time

Qty

SPICE

IBIS

Qty

$US each

LM1247AAG/NA

MDIP

Status

Full production

N/A

1K+

$3.00

rail
of
15

NSUZXYYTT
LM1247AAG/NA

11-12 weeks

60000

The LM1247 pre-amp is an integrated CMOS CRT preamp. It has an I²C compatible interface which allows control of all the parameters necessary to directly setup and adjust the gain and contrast in the CRT display. Brightness and bias can be controlled through the DAC outputs which are well matched to the LM2479 and LM2480 integrated bias clamp ICs. The LM1247 preamp is also designed to be compatible with the LM246x high gain driver family.

Black level clamping of the video signal is carried out directly on the AC coupled input signal into the high impedance preamplifier input, thus eliminating the need for additional clamp capacitors. Horizontal and vertical blanking of the outputs is provided. Vertical blanking is optional and its duration is register programmable.

The IC is packaged in an industry standard 24 lead DIP molded plastic package.

Features

Internal 512 character OSD ROM usable as either (a) 384 2-color plus 128 4-color characters, (b) 640 2-color characters, or (c) some combination in between
Internal 512 character RAM, which can be displayed as one single or two independent windows
I²C compatible microcontroller interface
OSD override allows OSD messages to override video and the use of burn-in screens with no video input
4 DAC outputs (8-bit resolution) for bus controlled CRT bias and brightness
Spot killer which blanks the video outputs when V_CC falls below the specified threshold
Suitable for use with discrete or integrated clamp, with software configurable brightness mixer
Horizontal blanking and OSD synchronization directly from deflection signals. The blanking can be disabled, if desired
Vertical blanking and OSD synchronization directly from deflection signals. The blanking width is register programmable and can be disabled, if desired
Power Saving Mode with 65% power reduction
Matched to LM246x driver and LM2479/80 bias IC's

Applications

Low end 15" and 17" bus controlled monitors with OSD
1024x768 displays up to 85 Hz requiring OSD capability
Very low cost systems with LM246x driver

Reliability Metrics

Part Number	Process	Early Failure Rate - Rejects	Sample Size (EFR)	PPM *	Rel. Rejects	Device Hours	Long Term Failure Rates (FITS)	MTTF
LM1247AAG/NA	CMOS7	2	14200	141	0	800000	5	226190940

For more information on Reliablitity Metrics, please click here.

[Information as of 15-Jan-2004]

LM1247 Product Folder

Datasheet

Package Availability, Models, Samples & Pricing

General Description

Features

Applications

Reliability Metrics