參數(shù)資料
型號(hào)： SP3232EBCP-L
廠商： Exar Corporation
文件頁(yè)數(shù)： 22/22頁(yè)
文件大小： 0K
描述： IC TXRX RS232 ESD TRUE 16PDIP
產(chǎn)品變化通告： Interface Product Discontinuation 10/May/2011
標(biāo)準(zhǔn)包裝： 25
類型： 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù)： 2/2
規(guī)程： RS232
電源電壓： 3 V ~ 5.5 V
安裝類型： 通孔
封裝/外殼： 16-DIP（0.300"，7.62mm）
供應(yīng)商設(shè)備封裝： 16-PDIP
包裝： 管件
Exar Corporation 48720 Kato Road, Fremont CA, 94538 510-668-7017 www.exar.com
SP3222EB/SP3232EB_102_031413
9
Receivers
The Receivers convert EIA/TIA-232 levels
to TTL or CMOS logic output levels. The
SP3222EB receivers have an inverting
tri-state output. These receiver outputs
(RxOUT) are tri-stated when the enable
control EN = HIGH. In the shutdown mode,
the receivers can be active or inactive. EN
has no effect on TxOUT. The truth table logic
ofthe
SP3222EBdriverandreceiveroutputs
can be found in Table 2.
Since receiver input is usually from a trans-
mission line where long cable lengths and
system interference can degrade the signal,
the inputs have a typical hysteresis margin
of 300mV. This ensures that the receiver
is virtually immune to noisy transmission
lines. Should an input be left unconnected,
an internal 5k pulldown resistor to ground
will commit the output of the receiver to a
HIGH state.
Table 2. SP3222EB Truth Table Logic for Shutdown
and Enable Control
Figure 10. SP3222EB/SP3232EB Driver Loopback
Test Circuit
Charge Pump
The charge pump is an Exar-patended
design (U.S. 5,306,954) and uses a unique
approach compared to older less-efficient
designs. The charge pump still requires four
external capacitors, but uses a four-phase
voltage shifting technique to attain sym-
metrical 5.5V power supplies. The internal
power supply consists of a regulated dual
charge pump that provides output voltages
of +/-5.5V regardless of the input voltage
(Vcc) over the +3.0V to +5.5V range.
Figure 12. Loopback Test results at 250kbps
Figure 11. Loopback Test results at 120kbps
SP3222EB
SP3232EB
GND
TxIN
TxOUT
C1+
C1-
C2+
C2-
V+
V-
VCC
0.1F
+
C2
C5
C1
+
C3
C4
+
0.1F
LOGIC
INPUTS
VCC
5k
RxIN
RxOUT
LOGIC
OUTPUTS
EN*
*SHDN
1000pF
VCC
* SP3222EB only
SHDN
EN
TxOUT
RxOUT
0
Tri-state
Active
0
1
Tri-state
1
0
Active
1
Active
Tri-state
DESCRIPTION
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SP3232EBCT 制造商:Exar Corporation 功能描述:Line Transceiver, 2-Driver, 2-Receiver, 16 Pin, Plastic, SOP
SP3232EBCT/TR 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:CorporationTrue +3.0V to +5.5V RS-232 Transceivers
SP3232EBCT-L 功能描述:RS-232接口集成電路 TRUE +3V-+5.5V RS-232 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:
SP3232EBCT-L/TR 功能描述:RS-232接口集成電路 TRUE +3V-+5.5V RS-232 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:
SP3232EBCY 制造商:Exar Corporation 功能描述:Line Transceiver, 2-Driver, 2-Receiver, 16 Pin, Plastic, TSSOP
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