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.
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
MAX7456
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.
Ordering Information
PART
MAX7456EUI+
PIN-PACKAGE
28 TSSOP-EP*
LANGUAGE
English/
Japanese
PKG
CODE
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
AVDD
AGND
DVDD
DGND
PVDD
PGND
VIN
CLAMP
SYSTEM
CLOCK
SYNC
SEPARATOR
DAC
OSD
MUX
VIDEO
DRIVER
VOUT
CLKIN
XFB
CLKOUT
HSYNC
VSYNC
LOS
XTAL
OSCILLATOR
VIDEO
TIMING
GENERATOR
SYNC
MAX7456
SAG
NETWORK
SAG
CS
SCLK
SDIN
SDOUT
RESET
POR
SERIAL
INTERFACE
DISPLAY
ADDRESS
DISPLAY
MEMORY
(SRAMS)
CHARACTER
ADDRESS
CHARACTER
MEMORY
(NVM)
PIXEL
CODE
OSD
GENERATOR
PIXEL
CONTROL
________________________________________________________________
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.
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
MAX7456
ABSOLUTE MAXIMUM RATINGS
AVDD to AGND ........................................................-0.3V to +6V
DVDD to DGND ........................................................-0.3V to +6V
PVDD to PGND.........................................................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
AGND to PGND .....................................................-0.3V to +0.3V
DGND to PGND.....................................................-0.3V to +0.3V
VIN, VOUT, SAG to AGND......................-0.3V to (V
AVDD
+ 0.3V)
HSYNC, VSYNC,
LOS to AGND ...............................-0.3V to +6V
RESET
to AGND .....................................-0.3V to (V
AVDD
+ 0.3V)
*As
per JEDEC51 Standard (Multilayer Board).
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
CLKIN, CLKOUT, XFB to DGND ............-0.3V to (V
DVDD
+ 0.3V)
SDIN, SCLK,
CS,
SDOUT to DGND........-0.3V to (V
DVDD
+ 0.3V)
Maximum Continuous Current into V
OUT
........................±100mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin TSSOP (derate 27mW/°C above +70°C) .......2162mW*
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
AVDD
= +4.75V to +5.25V, V
DVDD
= +4.75V to +5.25V, V
PVDD
= +4.75V to +5.25V, T
A
= T
MIN
to T
MAX
. Typical values are at V
AVDD
= V
DVDD
= V
PVDD
= +5V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
POWER SUPPLIES
Analog Supply Voltage
Digital Supply Voltage
Driver Supply Voltage
Analog Supply Current
Digital Supply Current
Driver Supply Current
NONVOLATILE MEMORY
Data Retention
Endurance
DIGITAL INPUTS (CS, SDIN,
RESET,
SCLK)
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
Output High Voltage
Output Low Voltage
Tri-State Leakage Current
C
IN
V
OH
V
OL
I
SOURCE
= 4mA (SDOUT, CLKOUT)
I
SINK
= 4mA
SDOUT,
CS
= V
DVDD
2.4
0.45
±10
V
IH
V
IL
V
HYS
V
IN
= 0 or V
DVDD
5
50
±10
2.0
0.8
V
V
mV
µA
pF
V
V
µA
T
A
= +25°C
T
A
= +25°C
100
100,000
Years
Stores
V
AVDD
V
DVDD
V
PVDD
I
AVDD
I
DVDD
I
PVDD
V
IN
= 1V
P-P
(100% white flat field signal),
VOUT load, R
L
= 150Ω
V
IN
= 1V
P-P
(100% white flat field signal),
VOUT load, R
L
= 150Ω
V
IN
= 1V
P-P
(100% white flat field signal),
VOUT load, R
L
= 150Ω
4.75
4.75
4.75
5
5
5
24
25
58
5.25
5.25
5.25
35
30
80
V
V
V
mA
mA
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL OUTPUTS (SDOUT, CLKOUT,
VSYNC, HSYNC,
LOS)
2
_______________________________________________________________________________________
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= +4.75V to +5.25V, V
DVDD
= +4.75V to +5.25V, V
PVDD
= +4.75V to +5.25V, T
A
= T
MIN
to T
MAX
. Typical values are at V
AVDD
= V
DVDD
= V
PVDD
= +5V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CLOCK INPUT (CLKIN)
Clock Frequency
Clock-Pulse High
Clock-Pulse Low
Input High Voltage
Input Low Voltage
Input Leakage Current
CLOCK OUTPUT (CLKOUT)
Duty Cycle
Rise Time
Fall Time
VIDEO CHARACTERISTICS
DC Power-Supply Rejection
V
AVDD
= V
DVDD
= V
PVDD
= 5V;
V
IN
= 1V
P-P
, measured at VOUT
V
AVDD
= V
DVDD
= V
PVDD
= 5V;
V
IN
= 1V
P-P
, measured at VOUT;
f = 5MHz; power-supply ripple = 0.2V
P-P
VOUT to PGND
LTD
Z
OUT
Figures 1a, 1b
Figures 1a, 1b
Figures 1a, 1b
At VOUT, Figures 1a, 1b
V
IN
V
INSD
V
OUT
BW
DG
DP
VOUT 100% white level with respect to
black level
Between consecutive horizontal lines
1.25
Figures 1a, 3 (Note 2)
Figures 1a, 3 (Note 3)
Figures 1a, 1b
V
OUT
= 2V
P-P
, Figures 1a, 1b
0.5
0.5
2.4
0.7
6
30
0.5
0.5
1.33
24
32
1.45
1.89
0.2
2.0
2.11
AGND
+ 1.5
1.2
2.0
40
dB
5pF and 10kΩ to DGND
5pF and 10kΩ to DGND
5pF and 10kΩ to DGND
40
50
3
3
60
%
ns
ns
V
IN
= 0V or V
DVDD
14
14
0.7 x
V
DVDD
0.3 x
V
DVDD
±50
27
MHz
ns
ns
V
V
µA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX7456
AC Power-Supply Rejection
Short-Circuit Current
Line-Time Distortion
Output Impedance
Gain
Black Level
Input-Voltage Operating Range
Input-Voltage Sync Detection
Range
Maximum Output-Voltage Swing
Output-Voltage Sync Tip Level
Large Signal Bandwidth (0.2dB)
VIN to VOUT Delay
Differential Gain
Differential Phase
OSD White Level
Horizontal Pixel Jitter
Video Clamp Settling Time
30
230
0.5
dB
mA
%
Ω
V/V
V
V
P-P
V
P-P
V
P-P
V
MHz
ns
%
Degrees
V
ns
Lines
_______________________________________________________________________________________
3
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
MAX7456
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= +4.75V to +5.25V, V
DVDD
= +4.75V to +5.25V, V
PVDD
= +4.75V to +5.25V, T
A
= T
MIN
to T
MAX
. Typical values are at V
AVDD
= V
DVDD
= V
PVDD
= +5V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
OSD CHARACTERISTICS
OSD Rise Time
OSD Fall Time
OSD Insertion Mux Switch Time
OSD insertion mux register
OSDM[5,4,3] = 011b
OSD insertion mux register
OSDM[5,4,3] = 011b
OSD insertion mux register
OSDM[2,1,0] = 011b
60
60
75
ns
ns
ns
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING CHARACTERISTICS
(V
AVDD
= +4.75V to +5.25V, V
DVDD
= +4.75V to +5.25V, V
PVDD
= +4.75V to +5.25V, T
A
= T
MIN
to T
MAX
. Typical values are at V
AVDD
= V
DVDD
= V
PVDD
= +5V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SPI TIMING
SCLK Period
SCLK Pulse-Width High
SCLK Pulse-Width Low
CS
Fall to SCLK Rise Setup
CS
Fall After SCLK Rise Hold
CS
Rise to SCLK Setup
CS
Rise After SCLK Hold
CS
Pulse-Width High
SDIN to SCLK Setup
SDIN to SCLK Hold
SDOUT Valid Before SCLK
SDOUT Valid After SCLK
CS
High to SDOUT High
Impedance
CS
Low to SDOUT Logic Level
HSYNC, VSYNC,
AND LOS TIMING
LOS,
VSYNC,
and
HSYNC
Valid
before CLKOUT Rising Edge
VOUT Sync to
VSYNC
Falling
Edge Delay
t
DOV
t
VOUT-VSF
20pF to ground
NTSC external sync mode, Figure 4
PAL external sync mode, Figure 6
30
375
400
ns
ns
t
CP
t
CH
t
CL
t
CSS0
t
CSH0
t
CSS1
t
CSH1
t
CSW
t
DS
t
DH
t
DO1
t
DO2
t
DO3
t
DO4
20pF to ground
20pF to ground
20pF to ground
20pF to ground
100
40
40
30
0
30
0
100
30
0
25
0
300
20
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
4
_______________________________________________________________________________________
Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
TIMING CHARACTERISTICS (continued)
(V
AVDD
= +4.75V to +5.25V, V
DVDD
= +4.75V to +5.25V, V
PVDD
= +4.75V to +5.25V, T
A
= T
MIN
to T
MAX
. Typical values are at V
AVDD
= V
DVDD
= V
PVDD
= +5V, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
VOUT Sync to
VSYNC
Rising
Edge Delay
VSYNC
Falling Edge to VOUT
Sync Delay
VSYNC
Rising Edge to VOUT
Sync Delay
VOUT Sync to
HSYNC
Falling
Edge Delay
VOUT Sync to
HSYNC
Rising
Edge Delay
HSYNC
Falling Edge to VOUT
Sync Delay
HSYNC
Rising Edge to VOUT
Sync Delay
All Supplies High to
CS
Low
NVM Write Busy
SYMBOL
t
VOUT-VSR
t
VSF-VOUT
t
VSR-VOUT
t
VOUT-HSF
t
VOUT-HSR
t
HSF-VOUT
t
HSR-VOUT
t
PUD
t
NVW
CONDITIONS
NTSC external sync mode, Figure 4
PAL external sync mode, Figure 6
NTSC internal sync mode, Figure 5
PAL internal sync mode, Figure 7
NTSC internal sync mode, Figure 5
PAL internal sync mode, Figure 7
NTSC and PAL external sync mode,
Figure 8
NTSC and PAL external sync mode,
Figure 8
NTSC and PAL internal sync mode,
Figure 9
NTSC and PAL internal sync mode,
Figure 9
Power-up delay
MIN
TYP
400
425
40
45
32
30
310
325
115
115
50
12
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ms
ms
MAX7456
Note 1:
See the standard test circuits of Figure 1. R
L
= 75Ω, unless otherwise specified. All digital input signals are timed from a
voltage level of (V
IH
+ V
IL
) / 2. All parameters are tested at T
A
= +85°C and values through temperature range are guaran-
teed by design.
Note 2:
The input-voltage operating range is the input range over which the output signal parameters are guaranteed (Figure 3).
Note 3:
The input-voltage sync detection range is the input composite video range over which an input sync signal is properly
detected and the OSD signal appears at VOUT. However, the output voltage specifications are not guaranteed for input sig-
nals exceeding the maximum specified in the input operating voltage range (Figure 3).
C
IN
0.1µF
SIGNAL
GEN
VIN
R
IN
75Ω
VOUT
MAX7456
MAX7456
SAG
C
L
22pF
R
L
150Ω
a) INPUT TEST CIRCUIT
b) ONE STANDARD VIDEO LOAD, DC-COUPLED
Figure 1. Standard Test Circuits
_______________________________________________________________________________________
5
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