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| 型号： | MAX7456EUI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/44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
Input Clamp
The MAX7456’s clamp is a DC-restore circuit that uses
the input coupling capacitor to correct any DC shift of
the input signal, on a line-by-line basis, such that the
sync tip at VIN is approximately 550mV. This establish-
es a DC level at VIN suitable for the on-chip sync
detection and video processing functions. This circuitry
also removes low-frequency noise such as 60Hz hum
or other additive low-frequency noise.
Sync Separator
The sync separator detects the composite sync pulses
on the video input and extracts the timing information to
generate HSYNC and VSYNC. It is also used for inter-
nal OSD synchronization and loss-of-sync (LOS) detec-
tion. LOS goes high if no sync signal is detected at VIN
for 32 consecutive lines, and goes low if 32 consecu-
tive horizontal sync signals are detected. During a LOS
condition, when VM0[5] = 0 (Video Mode 0 register, bit
5), only the OSD appears at the VOUT. At this time, the
input image is set to a gray level at VOUT as deter-
mined by VM1[6:4]. The behavior of all sync modes is
shown in Table 1.
COLOR BURST
SYNC TIP
LEVEL
BLACK LEVEL
WHITE LEVEL
MAXIMUM VIDEO SWING
INPUT VOLTAGE
MINIMUM VIDEO SWING
VIN
Figure 3. Definition of Terms
VIDEO MODE
VIN
VSYNC
HSYNC
LOS
VOUT
Video
Active
Low
VIN + OSD
Auto Sync Select Mode
VM0[5, 4] = 0x
No input
Active
High
OSD only
Video
Active
Low
VIN + OSD
External Sync Select
VM0[5, 4] = 10
No input
Inactive (high)
High
DC
Video
Active
High
OSD only
Internal Sync Select
VM0[5, 4] = 11
No input
Active
High
OSD only
Table 1. Video Sync Modes
X = Don’t care.
MAX7456
Maxim Integrated
11
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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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