SP312E_技术文档

SP202E,SP232E, SP233E, SP310E and SP312E

High Performance RS-232 Line Drivers/Receivers

FEATURES

• Operates from a Single +5V Power Supply

• Meets all RS-232D and ITU V.28 Speciﬁcations

• Operates with 0.ꢀμF to ꢀ0μF Ceramic Capacitors

• No External Capacitors required (SP233E)

• Low Power Shutdown (SP3ꢀ0E, SP3ꢀ2E)

• High Data Rate - ꢀ20kbps under load

• Low power CMOS Operation

• Lead Free packaging available

• Improved ESD Speciﬁcations:

+/-ꢀ5kV Human Body Model

DESCRIPTION

The SP202E, SP232E, SP233E, SP3ꢀ0E and SP3ꢀ2E devices are a family of line driver and re-

ceiver pairs that meets the speciﬁcations of RS-232 and V.28 serial protocols. The devices are pin-

to-pin compatible with Exar's SP232A, SP233A, SP3ꢀ0A and SP3ꢀ2A devices as well as popular

industry standard pinouts. The ESD tolerance has been improved on these devices to over +/-ꢀ5kV

for Human Body Model. This series offer a ꢀ20kbps data rate under load, small ceramic type 0.ꢀμF

charge pump capacitors and overall ruggedness for comercial applications. Features include Exar's

BiCMOS design which allowing low power operation without sacriﬁcing performance. The series is

available in lead free packages with commercial and industrial temperature ranges.

SELECTION TABLE

Model

Number of RS-232

Drivers Receivers

No. of RX

active in

Shutdown

No. of External

0.ꢀμF Capacitors

Shutdown

WakeUp TTL Tri-State

SP202E

SP232E

SP233E

SP3ꢀ0E

SP3ꢀ2E

2

0

2

4

0

4

No

Yes

No

Yes

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

ꢀ

AbSꢀLUTE MAxꢁMUM RATꢁꢂꢃS

This is a stress rating only and functional operation of

the device at these ratings or any other above those

indicated in the operation section of the speciﬁcation

is not implied. Exposure to absolute maximum ratings

conditions for extended periods of time may affect re-

liability.

Short Circuit duration

Tout.....................................................Continuous

Package Power Dissipation:

Plastic DIP...............................................375mW

(derate 7mW/°C above +70°C)

Supply Voltage (VCC)....................................................+ 6V

V+........................................................................... (Vcc-0.3V)to+ꢀꢀ.0V

V- .............................................................................-ꢀꢀ.0V

Input Voltages

Small Outline...........................................375mW

(derate 7mW/°C above +70°C)

Storage Temperature..................-65°C to +ꢀ50°C

Tin.....................................................-0.3V to (Vcc + 0.3V)

Rin............................................................................+/-ꢀ5V

Output Voltages

Tout...............................................(V+, +0.3V) to (V-, -0.3V

Rout...................................................-0.3V to (Vcc + 0.3V)

ELECTRꢁCAL CHARACTERꢁSTꢁCS

Vcc = 5V ±ꢀ0%, 0.ꢀμF charge pump capacitors, Tmin to Tmax, unless otherwise noted, Typical values are Vcc =

5V and Ta=25°C

PARAMETER

TEST CꢀꢂDꢁTꢁꢀꢂS

Mꢁꢂ

TYP

MAx

UꢂꢁT

TTL ꢁꢂPUT

Logic Threshold LOW

Logic Threshold HIGH

Logic Pull-Up Current

TTL ꢀUTPUT

T_in, En, SD, On/OFF

T_in= 0V

0.8

Volts

μA

2.0

ꢀ5

200

0.4

Output Voltge LOW

Output Voltage HIGH

Leakage Current **; Ta = +25°C

RS-232 ꢀUTPUT

iOuT = 3.2ma: Vcc = +5V

iOuT = -1.0ma

Volts

μA

3.5

En = Vcc, 0V ≤ VOuT ≤ Vcc

0.05

+/-6

+/-ꢀ0

all Transmitter outputs loaded

with 3k ohms to GND

Output Voltage Swing

+/-5.0

300

Volts

Output Resistance

Output Short Circuit Current

Maximum Data Rate

RS-232 ꢁꢂPUT

Vcc = 0V, Vout = +/-2V

Inﬁnite Duration

Ohms

mA

+/-ꢀ8

240

CL = 2500pF, RL = 3kΩ

ꢀ20

kbps

Voltage Range

-ꢀ5

0.8

+ꢀ5

Volts

kΩ

Voltage Threshold LOW

Voltage Threshold HIGH

Hysteresis

ꢀ.2

ꢀ.7

0.5

5

Vcc = 5V, Ta=25°C

2.8

ꢀ.0

7

Vcc = 5V, Ta=25°C

0.2

3

Vcc = 5V, Ta=25°C

Resistance

Ta = 25°C, -15V ≤ Vin ≤ +15V

** SP3ꢀ0E and SP3ꢀ2E only

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

2

ELECTRꢁCAL CHARACTERꢁSTꢁCS

Vcc = 5V ±ꢀ0%, 0.ꢀμF charge pump capacitors, Tmin to Tmax, unless otherwise noted, Typical values are Vcc =

5V and Ta=25°C

Parameter

TEST CꢀꢂDꢁTꢁꢀꢂS

Mꢁꢂ

TYP

MAx

Unit

DYꢂAMꢁC CHARACTERꢁSTꢁCS

Driver Propagation Delay

Receiver Propagation Delay

Instantaneous Slew Rate

TTL to RS-232; C_L= 50pF

RS-232 to TTL

ꢀ.5

0.ꢀ

3.0

ꢀ.0

30

μs

C_L= ꢀ0pF, R_L= 3-7kΩ; T_A= 25°C

V/μs

C_L= 2500pF, R_L= 3kΩ;

Measured from +3V to -3V or

-3V to +3V

Transition Region Slew Rate

ꢀ0

V/μs

Output Enable Time **

SP3ꢀ0E and SP3ꢀ2E only

SP3ꢀ0A and SP3ꢀ2A only

400

250

ns

Output Disable Time **

PꢀWER REQUꢁREMEꢂTS

Vcc Power Supply Current

No Load, Vcc = 5V, T_A= 25°C

3

5

mA

All Transmitters R_L= 3kΩ,

T_a= 25°C

Vcc Power Supply Current, Loaded

ꢀ5

Shutdown Supply Current **

** SP3ꢀ0E and SP3ꢀ2E only

Vcc = 5V, T_a= 25°C

ꢀ

μA

PERFꢀRMAꢂCE CURꢄES

-11

-10

-9

12

10

8

V

= 5V

= 6V

CC

V

CC

V

= 6V

-8

-7

-6

-5

-4

-3

CC

V

= 4V

CC

V

= 5V

CC

6

4

V

= 4V

CC

2

0

2

4

6

8

10 12 14

0

5

10 15 20 25 30 35 40

Load Current (mA)

9.0

8.5

25

20

ꢀ5

ꢀ0

5

8.0

7.5

7.0

6.5

6.0

V

= 6V

CC

Load current = 0mA

= 25C

V

CC

= 5V

= 4V

T

A

V

CC

V

= 3V

CC

5.5

5.0

0

-55 -40

0

25

70

85

ꢀ25

4.5

4.75

5.0

5.25

5.5

Temperature ( C)

V

CC

(Volts)

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3

Pꢁꢂ ASSꢁꢃꢂMEꢂTS

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

4

DESCRꢁPTꢁꢀꢂ

Receivers

DETAꢁLED DESCRꢁPTꢁꢀꢂ

The receivers convert EIA/TIA-232 signal lev-

els to inverted TTL or CMOS logic output lev-

els. Since the input is usually from a transmis-

sion line, where long cable length and system

interference can degrade the signal, the inputs

have a typical hysteresis margin of 500mV. This

ensures that the receiver is virtually immune to

noisy transmission lines. The input thresholds

are 0.8V minimum and 2.8V maximum, again

well within the +/-3V RS-232 requirements.

Should an input be left unconnected, an internal

5kohm pull-down resistor to ground will commit

the output of the receiver to a HIGH state.

The SP202E, SP232E, SP233E, SP3ꢀ0E and

SP3ꢀ2A devices are a family of line driver and

receiver pairs that meet the EIA/TIA-232 and

V.28 serial communication protocols. The ESD

tolerance has been improved on these devices

to over +/-ꢀ5kV for Human Body Model. These

devices are pin-to-pin compatible with Exar's

232A, 233A, 3ꢀ0A and 3ꢀ2A as well as popular

industry standards. This family of parts offer a

ꢀ20kbps data rate, ꢀ0V/μs slew rate and an on-

board charge pump that operates from a single

5V supply using 0.ꢀμF ceramic capacitors.

The SP202E, 232E, 233E, 3ꢀ0E and 3ꢀ2E de-

vices have internal charge pump voltage con-

verters which allow them to operate from a sin-

gle +5V supply. The charge pumps will operate

with polarized or non-polarized capacitors rang-

ing from 0.ꢀ to ꢀ0µF and will generate the +/-6V

needed to generate the RS-232 output levels.

In actual system applications, it is quite pos-

sible for signals to be applied to receiver inputs

before power is applied to the receiver circuitry.

This occurs, for example, when a PC user at-

tempts to print, only to realize that the printer

wasn't turned on. In this case an RS-232 signal

from the PC will appear on the receiver input

at the printer. When the printer power is turned

on, the receiver will operate normally. All of

these devices are fully protected.

The SP233E design offers internal charge pump

capacitors. The SP3ꢀ0E provides an ON/OFF

input that simultaneously disables the internal

charge pump circuit and puts all transmitter and

receiver outputs into a high impedance state.

The SP3ꢀ2E is identical to the SP3ꢀ0E but with

seperate tri-state and shutdown inputs

Charge pump

The charge pump is an Exar patented design

and uses a unique approach compared to

older less efﬁciant designs. The charge pump

requires 4 external capacitors and uses a four

phase voltage shifting technique. The internal

power supply consists of a dual charge pump

that provides a driver output voltage swing of

+/-6V. The internal oscillator controls the four

phases of the voltage shifting. A description of

each phase follows:

Theory ꢀf ꢀperation

The SP202E, SP232E, SP233E, SP3ꢀ0E and

SP3ꢀ2E devices are made up of three basic

circuit blocks: 1. Drivers, 2. Receivers, and 3.

charge pump. Each block is described below.

Drivers

The drivers are inverting level transmitters that

convert TTL or CMOS logic levels to EIA/TIA-

232 levels with an inverted sense relative to

the input logic levels. The typical driver output

voltage swing is +/-6V. Even under worst case

loading conditions of 3k ohms and 2500pF, the

driver output is guaranteed to be +/-5.0V mini-

mum, thus satisfying the RS-232 speciﬁcation.

The driver outputs are protected against inﬁnite

short-circuits to ground without degradation in

reliability.

Phase 1

Vss charge store and double: The positive ter-

minals of capacitors Cꢀ and C2 are charged

from Vcc with their negative terminals initially

connected to ground. Cꢀ+ is then connected

to ground and the stored charge from Cꢀ- is

superimposed onto C2-. Since C2+ is still con-

nected to Vcc the voltage potential across C2

is now 2 x Vcc.

Phase 2

Vss transfer and invert: Phase two connects

the negative terminal of C2 to the Vss storage

capacitor and the positive terminal of C2 to

ground. This transfers the doubled and invert-

ed (V-) voltage onto C4. Meanwhile, capacitor

The slew rate of the driver output is internally

limited to 30V/μs in order to meet the EIA stan-

dards (EIA-232F). Additionally, the driver out-

puts LOW to HIGH transition meets the mon-

tonic output requirements of the standard.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

5

DESCRꢁPTꢁꢀꢂ

Cꢀ is charged from Vcc to prepare it for its next

phase.

Wake-Up Feature for the SP312E

The SP3ꢀ2E has a wake-up feature that keeps

the receivers active when the device is placed

into shutdown. Table 1 deﬁnes the truth table for

the Wake-Up function. When only the receivers

are activated, the SP3ꢀ2E typically draws less

than 5uA supply current. In the case of when

a modem is interfaced to a computer in power

down mode, the Ring Indicator (RI) signal from

the modem would be used to "wake-up" the

computer, allowing it to accept data transmis-

sion.

Phase 3

Vdd charge store and double: Phase three is

identical to the ﬁrst phase. The positive termi-

nals of Cꢀ and C2 are charged from Vcc with

their negative terminals initially connected to

ground. Cꢀ+ is then connected to ground and

the stored charge from Cꢀ- is superimposed

onto C2-. Since C2+ is still connected to Vcc

the voltage potential across capacitor C2 is now

2 x Vcc.

After the ring indicator has propagated

through the SP3ꢀ2E receiver, it can be used

to trigger the power management circuitry of

the computer to power up the microproces-

sor, and bring the SD pin of the SP3ꢀ2E to a

logic high, taking it out of the shutdown mode.

The receiver propagation delay is typically

ꢀus. The enable time for V+ and V- is typi-

cally 2ms. After V+ and V- have settled to their

ﬁnal values, a signal can be sent back to the

modem on the data terminal ready (DTR) pin

signifying that the computer is ready to accept

the transmit data.

Phase 4

Vdd transfer: The fourth phase connects the

negative terminal of C2 to ground and the posi-

tive terminal of C2 to the Vdd storage capacitor.

This transfers the doubled (V+) voltage onto C3.

Meanwhile, capacitor Cꢀ is charged from Vcc to

prepare it for its next phase.

The clock rate for the charge pump typically op-

erates at greater than ꢀ5kHz allowing the pump

to run efﬁciently with small 0.1uF capacitors. Ef-

ﬁcient operation depends on rapid charging and

discharging of Cꢀ and C2, therefore capacitors

should be mounted as close as possible to the

IC and have low ESR (equivalent series resis-

tance). Inexpensive surface mount, ceramic ca-

pacitors are ideal for using on charge pump. If

polarized capacitors are used the positive and

negative terminals should be connected as

shown in the typical operating circuit. A diagram

of the individual phases are shown in Figure ꢀ.

Power

Receiver

SD EN Up/Down outputs

0

ꢀ

0

ꢀ

0

ꢀ

Down

Up

Enabled

Tri-state

Enabled

Tri-state

Up

Table ꢀ. Wake-up Function truth table

Shutdown (SD) and Enaꢅle (Eꢂ) features for

the SP310E and SP312E

Pin Strapping for the SP233E

To operate properly, the following pairs of pins

must be externally wired together as noted in

table 2:

Both the SP3ꢀ0E and SP3ꢀ2E have a shutdown

/ standby mode to conserve power in battery-

powered applications. To activate the shutdown

mode, which stops the operation of the charge

pump, a logic "0" is applied to the appropriate

control line. For the SP3ꢀ0E, this control line is

the ON/OFF (pin ꢀ8) input. Activating the shut-

down mode puts the SP3ꢀ0E transmitter and

receiver ouptuts into a high impedance con-

dition. For the SP3ꢀ2E, this control line is the

SHUTDOWN (pinꢀ8) input; this also puts the

transmitter outputs in a tri-state mode. The re-

ceiver outputs can be tri-stated seperately dur-

ing normal operation or shutdown by applying a

logic "ꢀ" on the EN line (pin ꢀ).

Pins Wired

Together

SOICW

Two V- pins

Two C2+ pins

Two C- pins

ꢀ0 & ꢀ7

ꢀ2 & ꢀ5

ꢀꢀ & ꢀ6

Connect Pins 6 and 9 to

GND

Table 2. Pin Strapping table for SP233E

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

6

DESCRꢁPTꢁꢀꢂ

+

V

CC

-

Phase 2 – Vss transfer from C2 to C4.

Meanwhile C1 is charged to Vcc

+

C

+

V

-

V+

3

C

2

1

-

e

-

CC

e

Phases 1 and 3: Store/Double.

Double charge from C1 onto C2.

C2 is now charged to -2xVcc

-

e

+

C

4

Vss

+

C

+

V+

3

Patented 5,306,954

+

C

1

2

-

e

-

e

V-

+

V

CC

C

-

4

Phase 4 VDD

Meanwhile C1 is charged to Vcc

transfer from C2 to C3.

V

DD

+

e

+

e

+

C

+

V+

3

C

1

2

-

e

V-

+

C

4

Figure ꢀ. Charge pump phases

The premise of this ESD test is to simulate

the human body's potential to store electro-

static energy and discharge it to an intergrated

circuit. The simulation is peformed by using a

test model as shown in ﬁgure 2. This method

will test the IC's capability to withstand an ESD

transient during normal handling such as in

manufacturing areas where the IC's tend to be

handled frequently.

ESD TꢀLERAꢂCE

The SP202E, 232E, 233E, 3ꢀ0E and 3ꢀ2E

devices incorporates ruggedized ESD cells on

all driver outputs and receiver input pins. The

ESD structure is improved over our previous

family for more rugged applications and envi-

ronments sensitive to electro-static discharges

and associated transients. The improved ESD

tolerance is at least +/-ꢀ5kV Human Body

Model without damage nor latch-up.

R

S

C

SW2

SW1

Device

Under

Test

DC Power

Source

The Human Body Model has been the gener-

ally accepted ESD testing method for semi-

conductors. This method is also speciﬁed in

MIL-STD-883, Method 30ꢀ5.7 for ESD testing.

C

S

Figure 2. ESD test circuit for Human Body

Model

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7

TYPꢁCAL PERFꢀRMAꢂCE CHARACTERꢁSTꢁCS

Figure 6, Charge pump outputs at

start up (ꢀ = Vcc, 2 = V+, 3 = V-).

Figure 3, SP232E Charge pump waveforms-

no load (ꢀ = Cꢀ+, 2 = C2+, 3 = V+, 4 = V-).

Figure 4, SP232E Charge pump waveforms

when fully loaded with 3Kohms (ꢀ = Cꢀ+, 2

= C2+, 3 = V+, 4 = V-).

Figure 5, Loopback results at 60KHZ and

2500pF load (ꢀ = TXin, 2 = TXout/RXin, 3 =

RXout).

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

8

Figure 7, SP202E and SP232E Typical

Application circuit

Figure 9, SP233ECT Typical Application

circuit

Figure 8, SP3ꢀ0E Typical Application

circuit

Figure ꢀ0, SP3ꢀ2E Typical Application

circuit

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

9

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

ꢀ0

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

ꢀꢀ

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

ꢀ2

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

ꢀ3

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

ꢀ4

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

ꢀ5

ORDERING INFORMATION

Part numꢅer

Temperature range

Package Type

SP202ECN-L

SP202ECN-L/TR

SP202ECP-L

0⁰C to +70⁰C

-40⁰C to +85⁰C

0⁰C to +70⁰C

-40⁰C to +85⁰C

0⁰C to +70⁰C

-40⁰C to +85⁰C

0⁰C to +70⁰C

-40⁰C to +85⁰C

0⁰C to +70⁰C

-40⁰C to +85⁰C

ꢀ6 pin NSOIC

ꢀ6 pin PDIP

SP202ECT-L

ꢀ6 pin SOICW

ꢀ6 pin NSOIC

ꢀ6 pin PDIP

SP202ECT-L/TR

SP202EEN-L

SP202EEN-L/TR

SP202EEP-L

SP202EET-L

ꢀ6 pin SOICW

ꢀ6 pin NSOIC

ꢀ6 pin PDIP

SP202EET-L/TR

SP232ECN-L

SP232ECN-L/TR

SP232ECP-L

SP232ECT-L

ꢀ6 pin SOICW

ꢀ6 pin NSOIC

ꢀ6 pin PDIP

SP232ECT-L/TR

SP232EEN-L

SP232EEN-L/TR

SP232EEP-L

SP232EET-L

ꢀ6 pin SOICW

20 pin SOICW

ꢀ8 pin PDIP

SP232EET-L/TR

SP233ECT-L

SP233ECT-L/TR

SP233EET-L

SP233EET-L/TR

SP3ꢀ0ECP-L

SP3ꢀ0ECT-L

ꢀ8 pin SOICW

ꢀ8 pin PDIP

SP3ꢀ0ECT-L/TR

SP3ꢀ0EEP-L

SP3ꢀ0EET-L

ꢀ8 pin SOICW

SP3ꢀ0EET-L/TR

SP3ꢀ2ECT-L

SP3ꢀ2ECT-L/TR

SP3ꢀ2EET-L

SP3ꢀ2EET-L/TR

All packages are available as lead free (RoHS compliant).

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

ꢀ6

REVISION HISTORY

Revision Description

Date

7-ꢀ9-04

ꢀꢀ-06-08

A

Original Sipex Data sheet

ꢀ.0.0

Generate new Datasheet using Exar format and change

revision to ꢀ.0.0. Remove IEC Air and Contact ESD ratings.

Update ordering information to remove EOL part numbers. Up-

date charge pump description to show regulated charge pump

design.

Notice

EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliabil-

ity. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are only for

illustration purposes and may vary depending upon a user's speciﬁc application. While the information in this publication has been carefully checked;

no responsibility, however, is assumed for inaccuracies.

EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can

reasonably be expected to cause failure of the life support system or to signiﬁcantly affect its safety or effectiveness. Products are not authorized for

use in such applications unless EXAR Corporation receives, in writting, assurances to its satisfaction that: (a) the risk of injury or damage has been

minimized ; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.

Datasheet November 2008

Send your Interface technical inquiry with technical details to: customersupport@exar.com

Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (5ꢀ0)668-7000 • www.exar.com SP202E,232E,233E, 3ꢀ0E, 3ꢀ2E_ꢀ00_ꢀꢀ0608

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型号：	SP312E
厂家：	EXAR CORPORATION
描述：	High Performance RS-232 Line Drivers/Receivers 高性能RS - 232线路驱动器/接收器驱动器
文件：	总17页 (文件大小：1059K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SP312E [EXAR]

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