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参数资料
| 型号： | MAX7456EUI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/44页 |
| 文件大小： | 0K |
| 描述： | IC ON-SCREEN DISPLAY 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | OSD（屏幕显示）视频发生器 |
| 应用： | 安全系统，视频路由 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1424 (CN2011-ZH PDF) |
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Single-Channel Monochrome On-Screen
Display with Integrated EEPROM
Detailed Description
The MAX7456 single-channel monochrome on-screen
display (OSD) generator integrates all the functions need-
ed to generate a user-defined OSD and insert it into the
output signal. The MAX7456 accepts a composite NTSC
or PAL video signal. The device includes an input clamp,
sync separator, video timing generator, OSD insertion
mux, nonvolatile character memory, display memory,
OSD generator, crystal oscillator, an SPI-compatible inter-
face to read/write the OSD data, and a video driver (see
the
Simplified Functional Diagram). Additionally, the
MAX7456 provides vertical sync (VSYNC), horizontal
sync (HSYNC), and loss-of sync (LOS) outputs for system
synchronization. A clock output signal (CLKOUT) allows
daisy-chaining of multiple devices.
See the
MAX7456 Register Description section for an
explanation of register notation use in this data sheet.
The 256 user-defined 12 x 18 pixel character set
comes preloaded and is combined with the input video
stream to generate a CVBS signal with OSD video out-
put. A maximum of 256 12 x 18 pixel characters can be
reprogrammed in the NVM. In NTSC mode, 13 rows x
30 characters are displayed. In PAL mode, 16 rows x
30 characters are displayed. When the input video sig-
nal is absent, the OSD image can still be displayed by
using the MAX7456’s internal video timing generator.
Video Input
The MAX7456 accepts standard NTSC or PAL CVBS
signals at VIN. The video signal input must be AC-cou-
pled with a 0.1F capacitor and is internally clamped.
An input coupling capacitance of 0.1F is required to
guarantee the specified line-time distortion (LTD) and
video clamp settling time. The video clamp settling time
changes proportionally to the input coupling capaci-
tance, and LTD changes inversely proportional to the
capacitance.
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
MAX7456
SDIN
+5V
27MHz
SDOUT
+5V
CVBS OUT
SAG
PGND
RESET
HSYNC
VSYNC
DGND
CLKIN
XFB
CLKOUT
CS
SDIN
SCLK
SDOUT
LOS
N.C.
SCLK
CS
CVBS IN
LOS
VS
HS
N.C.
CLKOUT
N.C.
AGND
N.C.
+5V
0.1
μF
COUT
75
Ω
75
Ω
1k
Ω
1k
Ω
1k
Ω
0.1
μF
0.1
μF
0.1
μF
CSAG
DVDD
VOUT
PVDD
VIN
AVDD
Figure 2. Typical Operating Circuit
MAX7456
10
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX7456EUI/GH9 | 制造商:Maxim Integrated Products 功能描述:SINGLE-CHANNEL MONOCHROME ON-SCREEN DISPLAY - Rail/Tube |
| MAX7456EUI+ | 功能描述:视频 IC Monochrome On Scrn Display Generator RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| MAX7456EUI+T | 功能描述:视频 IC Monochrome On Scrn Display Generator RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| MAX7456EUI+W | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX7456EVKIT | 功能描述:显示开发工具 RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V |
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