- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄362804 > EVM649EVM (Semtech Corporation) Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C PDF資料下載
參數(shù)資料
| 型號(hào)： | EVM649EVM |
| 廠商： | Semtech Corporation |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| 中文描述： | 電可擦除可編程邏輯器件 |
| 文件頁(yè)數(shù)： | 6/14頁(yè) |
| 文件大小： | 100K |
| 代理商： | EVM649EVM |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)當(dāng)前第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)
6
2000 Semtech Corp.
www.semtech.com
EDGE HIGH-PERFORMANCE PRODUCTS
Application Information
Edge649
Power Supplies
The Edge649 uses three power supplies
–
VDD, VCC
and VEE. VDD, typically +5V, is the digital supply for all
of the data inputs and outputs. VCC and VEE are the
analog power supplies for the DUT drivers and
comparators. VCC ranges from +6.5V to +11V and must
be greater than or equal to VDD + 1.5V. VEE is the
negative analog power and typically varies from 0V to
–
3V.
The Edge649 has several power supply requirements to
protect the part in power supply fault situations, as well
as during power up and power down sequences. VCC
must remain greater than or equal to VDD at all times.
Both VCC and VDD must always be positive (above
ground), and VEE must always be negative (at or below
ground).
The three-diode configuration shown in Figure 5, used
on a once-per-board basis, insures power supply
sequence and fault tolerance.
Figure 5.
Power Supply Protection Scheme
Power Supplies Decoupling
VDD, which provides the digital power, should be
decoupled to GND with a .1
μ
F chip capacitor in parallel
with a .001
μ
F chip capacitor. The bypass capacitors
should be as close to the device as possible. Power and
ground planes are recommended to provide a low
inductance return path.
VCC and VEE, which power the DUT drivers and receivers,
should also be decoupled to GND with a .1
μ
F chip
capacitor in parallel with a .001
μ
F chip capacitor. A
VCC and VEE plane, or at least a solid power bus, is
recommended for optimal performance.
V
HIGH
and V
LOW
Decoupling
As the V
HIGH
and V
LOW
inputs are unbuffered and must
supply the driver output current, decoupling capacitors
for these inputs are recommended in proportion to the
amount of output current the application requires
Expanding the Common Mode Range
Although the Edge649 can drive and receive 11V swings,
these 11 V signals can be adjusted over an 14V range.
By using programmable regulators V1 and V2 for the
VCC and VEE supplies (feasible because these two
analog power supplies do not supply driver output
current), the Edge649 I/O range can be optimized for a
variety of applications (see Figure 6).
Figure 6.
There are three rules which govern the supplies V1 and
V2:
1)
2)
3)
VDD + 1.5V
≤
V1
≤
+11V
–
3V
≤
V2
≤
0V
(V1
–
V2)
≤
11V
VCC
VDD
VEE
1N5820 or
Equivalent
V1
Edge 649
V2
VCC
VDD
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EVM692AHJ | 200 MHz Monolithic Dual Pin Electronics Driver |
| EVM693AHJ | 500 MHz Monolithic Dual Pin Electronics Driver |
| EVM710AHF | 500 MHz Pin Electronics Driver, Window Comparator, and Load |
| EVM749EVM | Low Power 5V RS232 Dual Driver/Receiver with 0.1?μF Capacitors; Package: SO; No of Pins: 16; Temperature Range: -40?°C to 85?°C |
| EVM818AHF | Octal 18V Pin Electronics Driver/window Comparator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVM692AHJ | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:200 MHz Monolithic Dual Pin Electronics Driver |
| EVM693AHJ | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:500 MHz Monolithic Dual Pin Electronics Driver |
| EVM710AHF | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:500 MHz Pin Electronics Driver, Window Comparator, and Load |
| EVM737ATF | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Per-Pin Precision Measurement Unit |
| EVM749EVM | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Octal Pin Electronics Driver/Receiver |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。