MAX7456 Datasheet, PDF (1/43 Pages) Maxim Integrated Products – Single-Channel Monochrome On-Screen Display with Integrated EEPROM

19-0576; Rev 0; 8/07
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
General Description
The MAX7456 single-channel monochrome on-screen
display (OSD) generator lowers system cost by elimi-
nating the need for an external video driver, sync sepa-
rator, video switch, and EEPROM. The MAX7456 serves
all national and international markets with 256 user-pro-
grammable characters in NTSC and PAL standards.
The MAX7456 easily displays information such as com-
pany logo, custom graphics, time, and date with arbi-
trary characters and sizes. The MAX7456 is preloaded
with 256 characters and pictographs and can be repro-
grammed in-circuit using the SPI^TM port.
The MAX7456 is available in a 28-pin TSSOP package
and is fully specified over the extended (-40°C to
+85°C) temperature range.
Applications
Security Switching Systems
Security Cameras
Industrial Applications
In-Cabin Entertainment
Consumer Electronics
Pin Configuration appears at end of data sheet.
SPI is a trademark of Motorola, Inc.
Features
♦ 256 User-Defined Characters or Pictographs in
Integrated EEPROM
♦ 12 x 18 Pixel Character Size
♦ Blinking, Inverse, and Background Control
Character Attributes
♦ Selectable Brightness by Row
♦ Displays Up to 16 Rows x 30 Characters
♦ Sag Compensation On Video-Driver Output
♦ LOS, VSYNC, HSYNC, and Clock Outputs
♦ Internal Sync Generator
♦ NTSC and PAL Compatible
♦ SPI-Compatible Serial Interface
♦ Delivered with Preprogrammed Character Set
Ordering Information
PART
PIN-PACKAGE LANGUAGE
PKG
CODE
MAX7456EUI+ 28 TSSOP-EP*
English/
Japanese
U28E-5
*EP = Exposed pad.
+Denotes a lead-free package.
Note: This device is specified over the -40°C to +85°C operat-
ing temperature range.
Simplified Functional Diagram
VIN
CLKIN
XFB
CLKOUT
HSYNC
VSYNC
LOS
CS
SCLK
SDIN
SDOUT
RESET
AVDD
AGND
DVDD
DGND
PVDD
PGND
CLAMP
XTAL
OSCILLATOR
SYSTEM
SYNC
CLOCK SEPARATOR
OSD
VIDEO
MUX
DRIVER
DAC
SERIAL
INTERFACE
VIDEO
TIMING
GENERATOR
DISPLAY
ADDRESS
SYNC
DISPLAY
MEMORY
(SRAMS)
CHARACTER
ADDRESS
MAX7456
CHARACTER
MEMORY
(NVM)
PIXEL
CODE
SAG
NETWORK
OSD
GENERATOR
PIXEL
CONTROL
POR
VOUT
SAG
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.