- 您现在的位置：买卖IC网 > PDF目录10161 > SP213ECA-L (Exar Corporation)IC TXRX RS232 ESD LP 28SSOP PDF资料下载
参数资料
| 型号： | SP213ECA-L |
| 厂商： | Exar Corporation |
| 文件页数： | 16/19页 |
| 文件大小： | 0K |
| 描述： | IC TXRX RS232 ESD LP 28SSOP |
| 标准包装： | 46 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 4/5 |
| 规程： | RS232 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 管件 |
| 其它名称： | 1016-1017-5 |
Exar Corporation 48720 Kato Road, Fremont CA, 94538 50-668-707 www.exar.com
SP207E_0_052
6
Receiver input thresholds are between .2
to .7 volts typical. This allows the receiver
todetectstandardTTLorCMOSlogic-level
signals as well as RS-232 signals. If a re-
ceiver input is left unconnected or un-driven,
a5kpulldownresistortogroundwillcommit
the receiver to a logic- output state.
Highly Efficient Charge–Pump
The onboard dual-output charge pump is
usedtogeneratepositiveandnegativesignal
voltagesfortheRS-232drivers. Thisenables
fullycompliantRS-232andV.28signalsfrom
a single power supply device.
The charge pumps use four external capaci-
tors to hold and transfer electrical charge.
The
Exar design uses a unique approach
comparedtoolder,less–efficientdesigns.
The pumps use a four–phase voltage shift-
ing technique to attain symmetrical V+ and
V- power supplies. An intelligent control
oscillator regulates the operation of the
chargepumptomaintainthepropervoltages
atmaximumefficiency.
Phase 1
V
SS charge store and double — The positive
terminalsofcapacitorsC
and C2 are charged
from V
CC with their negative terminals initially
connected to ground. C
l+ is then connected
to ground and the stored charge from C
– is
superimposed onto C
2
–. Since C
2+ is still
connectedtoV
CC the voltage potential across
capacitor C
2 is now 2 x VCC.
VCC = +5V
–5V
+5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
–
Phase 2
— V
SS transfer and invert — Phase two con-
nects the negative terminal of C
2 to the VSS
storage capacitor and the positive terminal
of C
2 to ground. This transfers the doubled
andinverted(V-)voltageontoC
3. Meanwhile,
capacitor C
charged from VCC to prepare it
for its next phase.
Phase 3
V
DD charge store and double —Phase three
isidenticaltothefirstphase.Thepositive
terminalsofcapacitorsC
and C2 are charged
from V
CC with their negative terminals initially
connected to ground. C
l+ is then connected
to ground and the stored charge from C
– is
superimposed onto C
2–. Since C2+ is still
connectedtoV
CC the voltage potential across
capacitor C
2 is now 2 x VCC.
Phase 4
V
DD transfer — The fourth phase connects
the negative terminal of C
2 to ground and
the positive terminal of C
2 to the VDD stor-
age capacitor. This transfers the doubled
(V+)voltageontoC
4. Meanwhile, capacitor
C
is charged from VCC to prepare it for its
next phase.
Figure . Charge Pump — Phase
VCC = +5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
–
-7V
Figure 2. Charge Pump — Phase 2
VCC = +5V
–5V
+5V
VSS Storage Capacitor
VDD Storage Capacitor
C1
C2
C3
C4
+
–
Figure 3. Charge Pump — Phase 3
相关PDF资料 |
PDF描述 |
|---|---|
| SF4281-12EPG-3ES | CONN RCPT 12POS PNL MNT PIN |
| MS27474E10F35SA | CONN RCPT 13POS JAM NUT W/SCKT |
| ADM3311EARU-REEL | IC TXRX RS-232 3:5 2.7V 28TSSOP |
| VI-J7J-MX-S | CONVERTER MOD DC/DC 36V 75W |
| AD7892AR-1REEL | IC ADC 12BIT LP 500KSPS 24-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SP213ECA-L/TR | 功能描述:RS-232接口集成电路 5V 4-DRVR/5-RCVR RS-232 0-70C RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| SP213ECT | 制造商:Exar Corporation 功能描述:Line Transceiver, 4-Driver, 5-Receiver, 28 Pin, Plastic, SOP |
| SP213ECT/TR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SP213ECT-L | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
| SP213ECT-L/TR | 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述: |
发布紧急采购，3分钟左右您将得到回复。