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參數(shù)資料
| 型號： | DS229E |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Line Driver or Receiver |
| 英文描述： | LINE TRANSCEIVER, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數(shù)： | 10/11頁 |
| 文件大?。?/td> | 1042K |
| 代理商： | DS229E |
MAX14983E
Enhanced 1:2 VGA Mux with
Monitor Detection and Priority Port Logic
8
Maxim Integrated
Truth Tables
Detailed Description
The MAX14983E integrates high-bandwidth analog
switches and level-translating buffers to implement a
complete 1:2 multiplexer for VGA signals. The device
provides switching for red-green-blue (RGB) signals,
horizontal and vertical synchronization (HSYNC/VSYNC)
pulses, display data channel (DDC) signals, and 5V
power supplies. The power switches provide +5V power
with current limiting and reverse-voltage protection.
The device uses a simplified power-supply interface that
operates from a single +5V supply. An internal 2.5V regu-
lator limits the voltage passed by the DDC switches to pro-
vide compatibility with low-voltage graphics controllers.
The device features two enable inputs and three monitor-
detection outputs. This interface signals to the graphics
controller when a monitor is inserted or removed from
either of the VGA ports and allows it to switch between
them. Alternatively, these signals can be connected
together to automatically select the port when a monitor
is plugged in. A dedicated output (MDOR) signals the
graphics controller when any monitor is detected.
5V Power Switches (S5V1, S5V2)
The device provides a switched +5V output in addition to
the regular VGA signals (S5V1 and S5V2). Each output
can supply 55mA with less than 300mV drop from VCC.
The S5V_ outputs tolerate +5V while turned off.
The power switches are protected against overcurrent
and overtemperature faults. The device limits current
supplied to each monitor side to 300mA (typ). Thermal-
protection circuitry shuts off the switch when the temper-
ature exceeds +150NC. The device is re-enabled once
the temperature has fallen below +125NC.
Each power switch output has a 250I (typ) pulldown resis-
tor to discharge filter capacitors when the switch is off.
RGB Switches
The device provides three single-pole/double-throw
(SPDT) high-bandwidth switches to route the standard
VGA R, G, and B signals (Table 1). The R, G, and B ana-
log switches are identical, and any of the three switches
can be used to route red, green, or blue video signals.
Horizontal/Vertical Sync Multiplexer
The HSYNC_/VSYNC_ signals are buffered to provide
level shifting and drive capability to meet the VESA
specification. HSYNC_/VSYNC_ signals are only routed
to the port selected by EN2 and EN1 (Table 1). HSYNC_
and VSYNC_ are not interchangeable.
Display Data Channel Multiplexer
(SDA_, SCL_)
The device provides two voltage-limited SPDT switches
to route DDC signals (SDA_, SCL_). These switches limit
the voltage that can be passed through to the graphics
controller to less than 2.5V. Internal pullup resistors on
the monitor side of the switches translate the graphics
controller signals to 5V compatible logic. Connect pullup
resistors on SCL0 and SDA0 to define the logic level of
the graphics controller.
The SDA_ and SCL_ switches are identical, and either
of these two switches can be used to route SDA or SCL
I2C signals.
Table 1. Channel Selection
Table 2. Monitor Detection
Note: The B_ switches are unconnected if the HSYNC_ input
is idle.
Note: MD1, MD2, and MDOR function regardless of the state
of the EN_ inputs.
EN1
EN2
VGA CONTROLLER
CONNECTED TO
0
Port 1
0
1
Port 1
1
0
Port 2
1
Not Connected
MONITOR 1
DETECTED
MONITOR 2
DETECTED
MD1
MD2
MDOR
No
1
No
Yes
1
0
Yes
No
0
1
0
Yes
0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS229N | LINE TRANSCEIVER, PDIP20 |
| DS229SN | LINE TRANSCEIVER, PDSO20 |
| DS2151Q | DATACOM, FRAMER, PQCC44 |
| DS229S | LINE TRANSCEIVER, PDSO20 |
| DS232AE | LINE TRANSCEIVER, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS229E/T&R | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS229E+ | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS229E+T&R | 制造商:Maxim Integrated Products 功能描述:IC TXRX TRI 5V RS-232 20-TSSOP |
| DS229E+T&R | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
| DS229EN | 功能描述:RS-232接口集成電路 RoHS:否 制造商:Exar 數(shù)據(jù)速率:52 Mbps 工作電源電壓:5 V 電源電流:300 mA 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:LQFP-100 封裝: |
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