SP3222EHCA-L_技术文档

®

SP3222EH/3232EH

3.3V, 460 Kbps RS-232Transceivers

FEATURES

■ Meets true EIA/TIA-232-F Standards

from a +3.0V to +5.5V power supply

■ Interoperable with RS-232 down to +2.7V

power source

■ 1µA Low-Power Shutdown with Receivers

Active (SP3222EH)

V

CC

1

2

3

4

5

6

7

16

15

C1+

V+

GND

C1-

14 T1OUT

SP3232EH

C2+

C2-

13

12

11

R1IN

R1OUT

T1IN

■ Enhanced ESD Specifications:

+15kV Human Body Model

V-

+15kV IEC1000-4-2 Air Discharge

+8kV IEC1000-4-2 Contact Discharge

■ 460Kbps Minimum Transmission Rate

■ Ideal for Handheld, Battery Operated

Applications

10

9

T2OUT

R2IN

T2IN

8

R2OUT

Now Available in Lead Free Packaging

DESCRIPTION

The SP3222EH and the 3232EH are 2 driver/2 receiver RS-232 transceiver solutions

intended for portable or hand-held applications such as notebook or palmtop computers.

Their data transmission rate of 460Kbps meeting the demands of high speed RS-232

applications. Both ICS have a high-efficiency, charge-pump power supply that requires only

0.1µFcapacitorsfor3.3Voperation. ThechargepumpallowstheSP3222EHandthe3232EH

series to deliver true RS-232 performance from a single power supply ranging from +3.3V

to +5.0V. The ESD tolerance of the SP3222EH/3232EH devices exceeds +15kV for both

Human Body Model and IEC1000-4-2 Air discharge test methods.

The SP3222EH device has a low-power shutdown mode where the devices' driver outputs

and charge pumps are disabled. During shutdown, the supply current is less than 1µA.

SELECTION TABLE

RS-232

Drivers

RS-232

Receivers Components

External

TTL

3-State

No. of

Pins

MODEL

Power Supplies

Shutdown

+3.0V to +5.5V

2

4

Yes

No

Yes

No

18, 20

16

SP3222EH

SP3232EH

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

1

ABSOLUTE MAXIMUM RATINGS

Input Voltages

TxIN, EN .....................................................-0.3V to +6.0V

RxIN.............................................................................±25V

These are stress ratings only and functional operation of the

device at these ratings or any other above those indicated in

the operation sections of the specifications below is not

implied. Exposure to absolute maximum rating conditions

for extended periods of time may affect reliability and cause

permanent damage to the device.

Output Voltages

TxOUT.....................................................................±13.2V

RxOUT..............................................-0.3V to (V_CC+ 0.3V)

Short-Circuit Duration

TxOUT...............................................................Continuous

V_CC................................................................-0.3V to +6.0V

V+ (NOTE 1)................................................-0.3V to +7.0V

V- (NOTE 1)................................................+0.3V to -7.0V

V+ + |V-| (NOTE 1)...................................................+13V

Storage Temperature.................................-65°C to +150°C

Power Dissipation Per Package

20-pin SSOP (derate 9.25mW/^oC above +70^oC).......750mW

18-pin PDIP (derate 15.2mW/^oC above +70^oC)......1220mW

18-pin SOIC (derate 15.7mW/^oC above +70^oC)......1260mW

20-pin TSSOP (derate 11.1mW/^oC above +70^oC).....890mW

16-pin SSOP (derate 9.69mW/^oC above +70^oC).......775mW

16-pin PDIP (derate 14.3mW/^oC above +70^oC)......1150mW

16-pin Wide SOIC (derate 11.2mW/^oC above +70^oC)....900mW

16-pin TSSOP (derate 10.5mW/^oC above +70^oC).....850mW

I

_CC(DC V_CCor GND current).................................+100mA

Electrostatic Discharge

HBM ......................................................................15kV

IEC1000-4-2-AirDischarge....................................15kV

IEC1000-4-2 Direct Contact....................................8kV

NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.

ELECTRICAL CHARACTERISTICS

Unless otherwise noted, the following specifications apply for V_CC= +3.0V to +5.0V with T_AMB= T_MINto T_MAX

PARAMETER

MIN

TYP

MAX UNITS

CONDITIONS

DC CHARACTERISTICS

Supply Current

0.3

1.0

10

mA

no load, T_AMB= +25°C,

V_CC= +3.3V, TxIN = V_CCor GND

Shutdown Supply Current

µA

SHDN=GND, T_AMB= +25°C,

V_CC=+3.3V, TxIN=V_CCor GND

LOGIC INPUTS AND RECEIVER OUTPUTS

Input Logic Threshold LOW

0.8

V

TxIN, EN, SHDN, Note 2

Input Logic Threshold HIGH

2.0

2.4

V_CC=3.3V, Note 2

V_CC=5.0V, Note 2

Input Leakage Current

Output Leakage Current

Output Voltage LOW

Output Voltage HIGH

DRIVER OUTPUTS

Output Voltage Swing

±0.01

±0.05

±1.0

±10

0.4

µA

V

TxIN, EN, SHDN, T_AMB= +25°C

receivers disabled

I_OUT=1.6mA

V_CC-0.6 V_CC-0.1

V

I_OUT=-1.0mA

±5.0

±5.4

±35

V

3kΩ load to ground at all driver outputs,

T_AMB=+25°C

Output Resistance

300

Ω

V_CC= V+ = V- = 0V, T_OUT= ±2V

Output Short-Circuit Current

Output Leakage Current

±60

±25

mA

µA

V_OUT= 0V

V_OUT= ±12V, V_CC= 0V or 3.0V+5.5V,

drivers disabled

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

2

ELECTRICAL CHARACTERISTICS

Unless otherwise noted, the following specifications apply for V_CC= +3.0V to +5.0V with T_AMB= T_MINto T_MAX

.

PARAMETER

MIN. TYP. MAX. UNITS CONDITIONS

RECEIVER INPUTS

Input Voltage Range

Input Threshold LOW

-15

+15

V

0.6

0.8

1.2

1.5

V

_CC=3.3V

_CC=5.0V

Input Threshold HIGH

1.5

1.8

2.4

V

_CC=3.3V

_CC=5.0V

Input Hysteresis

0.3

5

V

Input Resistance

3

7

kΩ

TIMING CHARACTERISTICS

Maximum Data Rate

Driver Propagation Delay

460

Kbps

R_L=3kΩ, C_L=1000pF, one driver switching

1.0

µs

t

_PHL, R_L= 3KΩ, C_L= 1000pF

_PLH, R_L= 3KΩ, C_L= 1000pF

Receiver Propagation Delay

0.3

µs

t

_PHL, RxIN to RxOUT, C_L=150pF

t_PLH, RxIN to RxOUT, C_L=150pF

Receiver Output Enable Time

Receiver Output Disable Time

Driver Skew

200

100

200

60

ns

500

ns

| t_PHL- t_PLH

|

Receiver Skew

1000

ns

Transition-Region Slew Rate

V/µs

V

_CC= 3.3V, R_L= 3KΩ, T_AMB= 25^oC,

measurements taken from -3.0V to +3.0V

or +3.0V to -3.0V

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

3

TYPICAL PERFORMANCE CHARACTERISTICS

Unless otherwise noted, the following performance characteristics apply for V_CC= +3.3V, 460Kbps data rates, all drivers

loaded with 3kΩ, 0.1µF charge pump capacitors, and T_AMB= +25°C.

14

12

6

4

2

10

Vout+

Vout-

8

0

500

1000

1500

2000

6

4

2

0

-2

-4

-6

+Slew

-Slew

Load Capacitance [pF]

0

500

1000

1500

2000

2330

Load Capacitance [pF]

Figure 1. Transmitter Output Voltage VS. Load

Capacitance for the SP3222EH and the SP3232EH

Figure 2. Slew Rate VS. Load Capacitance for the

SP3222EH and the SP3232EH

40

460Kbps

35

120Kbps

20Kbps

30

25

20

15

10

5

0

500 1000 1500 2000 2500 3000

Load Capacitance (pF)

Figure 3. Supply Current VS. Load Capacitance when

Transmitting Data for the SP3222EH and the SP3232EH

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

4

PIN DESCRIPTION

PIN NUMBER

SP3222EH

NAME

FUNCTION

SP3232EH

SSOP/-

TSSOP

DIP/SO

Receiver Enable. Apply logic LOW for normal operation.

Apply Logic HIGH to disable the receiver outputs (high-Z state).

EN

1

-

C1+

V+

Positive terminal of the voltage doubler charge-pump capacitor.

+5.5V generated by the charge pump.

2

3

2

3

1

2

C1-

C2+

C2-

V-

Negative terminal of the voltage doubler charge-pump capacitor.

Positive terminal of the inverting charge-pump capacitor.

Negative terminal of the inverting charge-pump capacitor.

-5.5V generated by the charge pump.

4

3

5

4

6

5

7

6

T1OUT RS-232 driver output.

T2OUT RS-232 driver output.

15

8

17

8

14

7

R1IN

R2IN

RS-232 receiver input.

14

9

16

9

13

8

R1OUT TTL/CMOS receiver output.

R2OUT TTL/CMOS receiver output.

13

10

12

11

16

17

15

10

13

12

18

19

12

9

T1IN

T2IN

GND

V_CC

TTL/CMOS driver input.

11

10

15

16

TTL/CMOS driver input.

Ground.

+3.0V to +5.5V supply voltage

Shutdown Control Input. Drive HIGH for normal device operation.

SHDN Drive LOW to shutdown the drivers (high-Z output) and the

on-board power supply.

18

-

20

-

NC

No Connect.

11, 14

Table 1. Device Pin Description

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

5

EN

1

2

3

4

5

6

7

20

19

18

17

16

15

SHDN

EN

1

2

3

4

5

6

7

18

17

16

15

14

13

SHDN

V

CC

C1+

V+

VCC

C1+

V+

GND

C1-

T1OUT

R1IN

C1-

T1OUT

R1IN

SP3222EH

C2+

C2-

V-

SP3222EH

C2+

C2-

V-

R1OUT

14

13

NC

12

11

10

T1IN

T2OUT

R2IN

8

9

T1IN

T2OUT

R2IN

8

9

T2IN

12 T2IN

NC

R2OUT

10

R2OUT

11

DIP/SO

SSOP/TSSOP

Figure 4. Pinout Configurations for the SP3222EH

V

CC

1

2

3

4

5

6

7

16

15

14

C1+

V+

GND

C1-

T1OUT

R1IN

SP3232EH

C2+

C2-

13

12

11

R1OUT

T1IN

V-

10

9

T2OUT

R2IN

T2IN

8

R2OUT

Figure 5. Pinout Configuration for the SP3232EH

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

6

VCC

+

19

CC

17

CC

0.1µF

C5

C1

0.1µF

C5

C1

V

2

3

2

3

C1+

V+

V-

V+

V-

+

0.1µF

*C3

C4

*C3

C4

4

5

4

5

C1-

7

C2+

7

C2+

SP3222EH

DIP/SO

SP3222EH

SSOP

TSSOP

+

C2

0.1µF

C2

0.1µF

6

C2-

T1OUT

T2OUT

15

8

T1OUT

T2OUT

12 T1IN

11 T2IN

17

8

13 T1IN

12 T2IN

LOGIC

INPUTS

RS-232

OUTPUTS

LOGIC

INPUTS

RS-232

OUTPUTS

14

13

10

R1IN

R1OUT

16

15

10

R1IN

R1OUT

5kΩ

RS-232

INPUTS

LOGIC

OUTPUTS

RS-232

INPUTS

LOGIC

OUTPUTS

R2IN

9

R2OUT

R2IN

9

R2OUT

1 EN

18

1 EN

20

SHDN

GND

16

GND

18

*can be returned to

either VCC or GND

*can be returned to

either VCC or GND

Figure 6. SP3222EH Typical Operating Circuits

V

CC

+

16

CC

0.1µF

C5

C1

V

2

1

C1+

V+

V-

+

0.1µF

*C3

C4

3

4

C1-

6

C2+

SP3232EH

C2

0.1µF

5

C2-

T1OUT

T2OUT

14

11 T1IN

LOGIC

RS-232

7

10

12

9

INPUTS

T2IN

OUTPUTS

R1IN 13

R1OUT

R2OUT

5kΩ

RS-232

INPUTS

LOGIC

OUTPUTS

R2IN

8

GND

15

*can be returned to

either VCC or GND

Figure 7. SP3232EH Typical Operating Circuit

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

7

DESCRIPTION

The SP3222EH and SP3232EH are 2-driver/

2-receiver devices ideal for portable or hand-held

applications. The SP3222EH features a 1µA

shutdown mode that reduces power consumption

and extends battery life in portable systems.

Its receivers remain active in shutdown mode,

allowing external devices such as modems to be

monitored using only 1µA supply current.

The slew rate of the driver output is internally

limitedtoamaximumof30V/µsinordertomeet

the EIA standards (EIA RS-232D 2.1.7,

Paragraph 5). The transition of the loaded output

from HIGH to LOW also meets the monotonicity

requirements of the standard.

Figure8showsaloopbackcircuitusedtotestthe

RS-232 drivers. Figure 9 shows the test results

of the loopback circuit with all drivers active at

120Kbps and RS-232 loads in parallel with

1000pF capacitors. Figure 10 shows the test

resultswhereonedriverisactiveat460Kbpsand

all drivers are loaded with an RS-232 receiver

in parallel with a 1000pF capacitor.

The SP3222EH/3232EH transceivers meet the

EIA/TIA-232 and V.28/V.24 communication

protocols. They feature Sipex's proprietary

on-board charge pump circuitry that generates

2 x V_CCfor RS-232 voltage levels from a single

+3.0V to +5.5V power supply. The SP3222EH/

3232EH drivers operate at a minimum data

rate of 460Kbps.

The SP3222EH driver's output stages are

tri-stated in shutdown mode. When the power is

off, the SP3222EH devicepermitstheoutputsto

be driven up to +12V. Because the driver's

inputs do not have pull-up resistors, unused

inputs should be connected to V_CCor GND.

THEORY OF OPERATION

The SP3222EH/3232EH are made up of three

basiccircuitblocks: 1. Drivers, 2. Receivers, and 3.

the Sipex proprietary charge pump.

In the shutdown mode, the supply current is less

than 1µA, where SHDN = LOW. When the

SP3222EH device is shut down, the device's

driver outputs are disabled (tri-stated) and the

charge pumps are turned off with V+ pulled

down to V_CCand V- pulled to GND. The time

required to exit shutdown is typically 100µs.

SHDNisconnectedtoV_CCiftheshutdownmode

is not used. SHDN has no effect on RxOUT or

RxOUTB. Astheybecomeactive, thetwodriver

outputs go to opposite RS-232 levels: one driver

input is HIGH and the other LOW. Note that the

drivers are enabled only when the magnitude of

V- exceeds approximately 3V.

Drivers

The drivers are inverting level transmitters that

convert TTL or CMOS logic levels to +5.0V

EIA/TIA-232 levels inverted relative to the input

logic levels. Typically, the RS-232 output voltage

swing is +5.5V with no load and at least +5V

minimum fully loaded. The driver outputs are

protectedagainstinfiniteshort-circuitstoground

without degradation in reliability. Driver outputs

will meet EIA/TIA-562 levels of +3.7V with

supply voltages as low as 2.7V.

The drivers have a minimum data rate of

460Kbps fully loaded with 3KΩ in parallel with

1000pF, ensuring compatibility with PC-to-PC

communication software.

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

8

V

CC

+

0.1µF

C5

C1

V

CC

C1+

V+

V-

+

C3

C4

0.1µF

C1-

SP3222EH

SP3232EH

C2+

+

C2

0.1µF

C2-

TxOUT

RxIN

TxIN

LOGIC

INPUTS

RxOUT

EN

LOGIC

OUTPUTS

5kΩ

V

CC

*SHDN

GND

1000pF

* SP3222 only

Figure 8. SP3222EH/3232EH Driver Loopback Test Circuit

T1 IN

T1 OUT

R1 OUT

T1 OUT

R1 OUT

Figure 9. Driver Loopback Test Results at 120Kbps

Figure 10. Driver Loopback Test Results at 460Kbps

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

9

Receivers

In most circumstances, decoupling the power

supply can be achieved adequately using a

0.1µF bypass capacitor at C5 (refer to Figures 6

and 7). In applications that are sensitive to

power-supply noise,V_CCand ground can be

decoupled with a capacitor of the same value

as charge-pump capacitor C1. It is always

important to physically locate bypass capacitors

close to the IC.

The receivers convert EIA/TIA-232 levels to

TTL or CMOS logic output levels. The

SP3222EH receivers have an inverting tri-state

output.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 of the SP3222EH driver and receiver

outputs can be found in Table 2.

The charge pump operates in a discontinuous

mode using an internal oscillator. If the output

voltage is less than 5.5V, the charge pump is

enabled. If the output voltage exceeds 5.5V,

the charge pump is disabled. An oscillator

controls the four phases of the voltage shifting.

A description of each phase follows.

Since receiver input is usually from a transmis-

sion line where long cable lengths and system

interference can degrade the signal and inject

noise, the inputs have a typical hysteresis margin

of 300mV. Should an input be left unconnected,

a 5kΩ pulldown resistor to ground forces the

output of the receiver HIGH.

Phase 1: V_SSCharge Storage (Figure 12)

Duringthisphaseoftheclockcycle, thepositive

side of capacitors C₁and C₂are charged to V_CC.

C_l⁺is then switched to GND and the charge in

C₁^–is transferred to C₂^–. Since C₂⁺is connected

to V_CC, the voltage potential across capacitor C₂

is now 2 times V_CC.

Charge Pump

The Sipex patented charge pump (5,306,954)

uses a four–phase voltage shifting technique to

attain symmetrical 5.5V power supplies and

requires four external capacitors. The internal

powersupplyconsistsofaregulateddualcharge

pump that provides an output voltage of 5.5V

regardless of the input voltage (V_CC) over the

+3.0V to +5.5V range.

Phase 2: V_SSTransfer (Figure 13)

Phase two of the clock connects the negative

terminal of C₂to the V_SSstorage capacitor and

the positive terminal of C₂to GND. This

transfers a negative generated voltage to C₃.

This generated voltage is regulated to a

minimum voltage of -5.5V. Simultaneous with

the transfer of the voltage to C₃, the positive side

of capacitor C₁is switched to V_CCand the

negative side is connected to GND.

SHDN

EN

0

TxOUT

Tri-state

Active

RxOUT

Active

Phase 3: V_DDCharge Storage (Figure 15)

The third phase of the clock is identical to the

first phase — the charge transferred in C₁

produces –V_CCin the negative terminal of C₁,

whichisappliedtothenegativesideofcapacitor

C₂. Since C₂⁺is at V_CC, the voltage potential

across C₂is 2 times V_CC.

0

1

Tri-state

Active

0

1

Active

Tri-state

Table 2. Truth Table Logic for Shutdown and Enable

Control

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

10

discharge it to an integrated circuit. The

simulation is performed by using a test model as

shown in Figure 17. This method will test the

IC’s capability to withstand an ESD transient

during normal handling such as in manufacturing

areas where the ICs tend to be handled

frequently.

Phase 4: V_DDTransfer (Figure 16)

The fourth phase of the clock connects the

negative terminal of C₂to GND, and transfers

this positive generated voltage across C₂to C₄,

the V_DDstorage capacitor. This voltage is

regulated to +5.5V. At this voltage, the internal

oscillator is disabled. Simultaneous with the

transfer of the voltage to C₄, the positive side of

capacitor C₁is switched to V_CCand the negative

side is connected to GND, allowing the charge

pump cycle to repeat. The charge pump cycle

will continue as long as the operational

conditions for the internal oscillator are present.

The IEC-1000-4-2, formerly IEC801-2, is

used for testing ESD on equipment and

systems. For system manufacturers, they must

guarantee a certain amount of ESD protection

since the system itself is exposed to the outside

environment and human presence. The premise

with IEC1000-4-2 is that the system is required

towithstandanamountofstaticelectricitywhen

ESD is applied to points and surfaces of the

equipment that are accessible to personnel

during normal usage. In many cases, the RS232

transceiver IC receives most of the ESD current

when the ESD source is applied to the connector

pins. ThetestcircuitforIEC1000-4-2is shownon

Figure 18. There are two methods within

IEC1000-4-2, theAirDischargemethodandthe

Contact Discharge method.

Since both V⁺and V^–are separately generated

from V_CC; in a no–load condition V⁺and V^–will

besymmetrical. Olderchargepumpapproaches

that generate V^–from V⁺will show a decrease in

the magnitude of V^–compared to V⁺due to the

inherent inefficiencies in the design.

The charge pump clock rate typically operates

at 250kHz. The external capacitors can be as low

as 0.1µF with a 16V breakdown voltage rating.

ESD Tolerance

With the Air Discharge Method, an ESD

voltage is applied to the equipment under

test (EUT) through air. This simulates an

electrically charged person ready to connect a

cable onto the rear of the system. The high

energy potential on the person discharges

through an arcing path to the rear panel of the

system before he or she touches the system.

This energy, whether discharged directly or

through air, is predominantly a function of the

discharge current rather than the discharge

voltage. Variables with an air discharge such

as approach speed of the object carrying the

ESD potential to the system and humidity will

tendtochangethedischargecurrent. Forexample,

the rise time of the discharge current varies

with the approach speed.

The SP3222EH/3232EH series incorporates

ruggedized ESD cells on all driver output

and receiver input pins. The improved ESD

tolerance is at least ±15kV without damage or

latch-up.

Three methods of ESD testing are performed:

a) MIL-STD-883, Method 3015.7

b) IEC1000-4-2 Air-Discharge

c) IEC1000-4-2 Direct Contact

The Human Body Model has been the generally

accepted ESD testing method for semiconduc-

tors. ThismethodisalsospecifiedinMIL-STD-

883,Method3015.7forESDtesting.Thepremise

of this ESD test is to simulate the human body’s

potential to store electro-static energy and

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

11

V

= +5V

CC

C

+5V

4

+

–

+

V

Storage Capacitor

DD

+

–

+

–

C

2

1

–

SS

C

–5V

3

Figure 12. Charge Pump — Phase 1

V

= +5V

CC

C

4

+

–

+

V

Storage Capacitor

DD

+

–

C

2

1

–

SS

C

–10V

3

Figure 13. Charge Pump — Phase 2

[

T

]

+6V

a) C²⁺

T

GND

1

2

GND

b) C2-

-6V

Ch1 2.00V Ch2 2.00V M 1.00µs Ch1 5.48V

Figure 14. Charge Pump Waveforms

V

= +5V

CC

C

+5V

4

+

–

+

V

Storage Capacitor

DD

+

–

C

2

1

–

SS

C

–5V

3

Figure 15. Charge Pump — Phase 3

V

= +5V

CC

C

+

+10V

+

4

–

+

V

Storage Capacitor

DD

SS

+

C

2

1

–

V

C

3

Figure 16. Charge Pump — Phase 4

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

12

R

S

R

C

SW2

SW1

Device

Under

Test

DC Power

Source

C

S

Figure 17. ESD Test Circuit for Human Body Model

The Contact Discharge Method applies the ESD

current directly to the EUT. This method was

devised to reduce the unpredictability of the

ESD arc. The discharge current rise time is

constant since the energy is directly transferred

without the air-gap arc. In situations such as

hand held systems, the ESD charge can be

directly discharged to the equipment from a

person already holding the equipment. The

current is transferred on to the keypad or the

serial port of the equipment directly and then

travels through the PCB and finally to the IC.

The circuit models in Figures 17 and 18

represent the typical ESD testing circuits used

forallthreemethods. TheC_Sisinitiallycharged

with the DC power supply when the first

switch (SW1) is on. Now that the capacitor is

charged, the second switch (SW2) is on while

SW1 switches off. The voltage stored in the

capacitor is then applied through R_S, the current

limiting resistor, onto the device under test

(DUT). In ESD tests, the SW2 switch is pulsed

so that the device under test receives a duration

of voltage.

Contact-Discharge Module

R

S

R

V

C

SW2

SW1

Device

Under

Test

DC Power

Source

C

S

R

and R add up to 330Ω for IEC1000-4-2.

S

V

Figure 18. ESD Test Circuit for IEC1000-4-2

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

13

For the Human Body Model, the current

limiting resistor (R_S) and the source capacitor

(C_S) are 1.5kΩ an 100pF, respectively. For

IEC-1000-4-2, the current limiting resistor (R_S)

andthesourcecapacitor(C_S)are330Ωan150pF,

respectively.

30A

15A

0A

The higher C_Svalue and lower R_Svalue in the

IEC1000-4-2 model are more stringent than the

Human Body Model. The larger storage

capacitor injects a higher voltage to the test

point when SW2 is switched on. The lower

current limiting resistor increases the current

t=0ns

t=30ns

t ■

charge onto the test point.

Figure 19. ESD Test Waveform for IEC1000-4-2

Device Pin

Tested

Human Body

Model

IEC1000-4-2

Air Discharge Direct Contact

Level

Driver Outputs

Receiver Inputs

±15kV

±8kV

4

Table 3. Transceiver ESD Tolerance Levels

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

14

PACKAGE: PLASTIC SHRINK

SMALL OUTLINE

(SSOP)

E

H

D

A

Ø

A1

L

e

B

DIMENSIONS (Inches)

Minimum/Maximum

(mm)

16–PIN

24–PIN

20–PIN

28–PIN

0.068/0.078

(1.73/1.99)

0.068/0.078

(1.73/1.99)

A

A1

B

D

E

0.068/0.078

(1.73/1.99)

0.068/0.078

(1.73/1.99)

0.002/0.008

(0.05/0.21)

0.002/0.008

(0.05/0.21)

0.002/0.008

(0.05/0.21)

0.002/0.008

(0.05/0.21)

0.010/0.015

(0.25/0.38)

0.010/0.015

(0.25/0.38)

0.010/0.015

(0.25/0.38)

0.010/0.015

(0.25/0.38)

0.239/0.249

(6.07/6.33)

0.317/0.328

(8.07/8.33)

0.278/0.289

(7.07/7.33)

0.397/0.407

(10.07/10.33)

0.205/0.212

(5.20/5.38)

0.205/0.212

(5.20/5.38)

0.205/0.212

(5.20/5.38)

0.205/0.212

(5.20/5.38)

0.0256 BSC

(0.65 BSC)

0.0256 BSC

(0.65 BSC)

e

0.0256 BSC

(0.65 BSC)

0.0256 BSC

(0.65 BSC)

0.301/0.311

(7.65/7.90)

0.301/0.311

(7.65/7.90)

H

L

0.301/0.311

(7.65/7.90)

0.301/0.311

(7.65/7.90)

0.022/0.037

(0.55/0.95)

0.022/0.037

(0.55/0.95)

0.022/0.037

(0.55/0.95)

0.022/0.037

(0.55/0.95)

0°/8°

(0°/8°)

0°/8°

(0°/8°)

Ø

0°/8°

(0°/8°)

0°/8°

(0°/8°)

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

15

PACKAGE: PLASTIC

DUAL–IN–LINE

(NARROW)

E1

E

D1 = 0.005" min.

(0.127 min.)

A1 = 0.015" min.

(0.381min.)

D

A = 0.210" max.

(5.334 max).

C

A2

Ø

L

B1

B

e

= 0.300 BSC

(7.620 BSC)

e = 0.100 BSC

(2.540 BSC)

A

ALTERNATE

END PINS

(BOTH ENDS)

DIMENSIONS (Inches)

Minimum/Maximum

(mm)

16–PIN

18–PIN

0.115/0.195

(2.921/4.953)

0.115/0.195

(2.921/4.953)

A2

0.014/0.022

(0.356/0.559)

0.014/0.022

(0.356/0.559)

B

0.045/0.070

B1

C

(1.143/1.778)

0.008/0.014

(0.203/0.356)

0.008/0.014

(0.203/0.356)

0.780/0.800

0.880/0.920

D

(19.812/20.320) (22.352/23.368)

0.300/0.325

(7.620/8.255)

0.300/0.325

(7.620/8.255)

E

0.240/0.280

E1

L

(6.096/7.112)

0.115/0.150

(2.921/3.810)

0.115/0.150

(2.921/3.810)

0°/ 15°

(0°/15°)

0°/ 15°

(0°/15°)

Ø

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

16

PACKAGE: PLASTIC

SMALL OUTLINE (SOIC)

E

H

D

A

Ø

A1

L

e

B

DIMENSIONS (Inches)

Minimum/Maximum

(mm)

16–PIN

18–PIN

A

A1

B

D

E

0.090/0.104

(2.29/2.649)

0.090/0.104

(2.29/2.649))

0.004/0.012

(0.102/0.300) (0.102/0.300)

0.004/0.012

0.013/0.020

(0.330/0.508) (0.330/0.508)

0.013/0.020

0.398/0.413

(10.10/10.49) (11.35/11.74)

0.447/0.463

0.291/0.299 0.291/0.299

(7.402/7.600) (7.402/7.600)

e

0.050 BSC

(1.270 BSC)

0.050 BSC

(1.270 BSC)

H

L

0.394/0.419

(10.00/10.64) (10.00/10.64)

0.016/0.050

(0.406/1.270) (0.406/1.270)

0.016/0.050

Ø

0°/8°

(0°/8°)

0°/8°

(0°/8°)

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

17

PACKAGE: PLASTIC THIN SMALL

OUTLINE

(TSSOP)

E2

E

D

A

Ø

A1

L

e

B

DIMENSIONS

in inches (mm)

16–PIN

20–PIN

Minimum/Maximum

- /0.043

(- /1.10)

- /0.043

(- /1.10)

A

0.002/0.006

(0.05/0.15)

0.002/0.006

(0.05/0.15)

A1

B

0.007/0.012

(0.19/0.30)

0.007/0.012

(0.19/0.30)

0.193/0.201

(4.90/5.10)

0.252/0.260

(6.40/6.60)

D

0.169/0.177

(4.30/4.50)

0.169/0.177

(4.30/4.50)

E

0.026 BSC

(0.65 BSC)

0.026 BSC

(0.65 BSC)

e

0.126 BSC

(3.20 BSC)

0.126 BSC

(3.20 BSC)

E2

L

0.020/0.030

(0.50/0.75)

0.020/0.030

(0.50/0.75)

0°/8°

Ø

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

18

ORDERING INFORMATION

Package Type

Part Number

Temperature Range

SP3222EHCA .......................................... 0˚C to +70˚C .......................................... 20-Pin SSOP

SP3222EHCA/TR .................................... 0˚C to +70˚C .......................................... 20-Pin SSOP

SP3222EHEA ......................................... -40˚C to +85˚C ........................................ 20-Pin SSOP

SP3222EHEA/TR.................................... -40˚C to +85˚C ........................................ 20-Pin SSOP

SP3222EHCP .......................................... 0˚C to +70˚C ............................................ 18-Pin PDIP

SP3222EHEP ......................................... -40˚C to +85˚C .......................................... 18-Pin PDIP

SP3222EHCT .......................................... 0˚C to +70˚C ........................................ 18-Pin WSOIC

SP3222EHCT/TR ..................................... 0˚C to +70˚C ........................................ 18-Pin WSOIC

SP3222EHET.......................................... -40˚C to +85˚C ...................................... 18-Pin WSOIC

SP3222EHET/TR .................................... -40˚C to +85˚C ...................................... 18-Pin WSOIC

SP3222EHCY .......................................... 0˚C to +70˚C ........................................ 20-Pin TSSOP

SP3222EHCY/TR .................................... 0˚C to +70˚C ........................................ 20-Pin TSSOP

SP3222EHEY ......................................... -40˚C to +85˚C ...................................... 20-Pin TSSOP

SP3222EHEY/TR.................................... -40˚C to +85˚C ...................................... 20-Pin TSSOP

SP3232EHCA .......................................... 0˚C to +70˚C .......................................... 16-Pin SSOP

SP3232EHCA/TR .................................... 0˚C to +70˚C .......................................... 16-Pin SSOP

SP3232EHEA ......................................... -40˚C to +85˚C ........................................ 16-Pin SSOP

SP3232EHEA/TR.................................... -40˚C to +85˚C ........................................ 16-Pin SSOP

SP3232EHCP .......................................... 0˚C to +70˚C ............................................ 16-Pin PDIP

SP3232EHEP ......................................... -40˚C to +85˚C .......................................... 16-Pin PDIP

SP3232EHCT .......................................... 0˚C to +70˚C ........................................ 16-Pin WSOIC

SP3232EHCT/TR ..................................... 0˚C to +70˚C ........................................ 16-Pin WSOIC

SP3232EHET.......................................... -40˚C to +85˚C ...................................... 16-Pin WSOIC

SP3232EHET/TR .................................... -40˚C to +85˚C ...................................... 16-Pin WSOIC

SP3232EHCY .......................................... 0˚C to +70˚C ........................................ 16-Pin TSSOP

SP3232EHCY/TR .................................... 0˚C to +70˚C ........................................ 16-Pin TSSOP

SP3232EHEY ......................................... -40˚C to +85˚C ...................................... 16-Pin TSSOP

SP3232EHEY/TR.................................... -40˚C to +85˚C ...................................... 16-Pin TSSOP

Available in lead free packaging. To order add "-L" suffix to part number.

Example: SP3232EHEY/TR = standard; SP3232EHEY-L/TR = lead free

/TR = Tape and Reel

Pack quantity is 1,500 for WSOIC, SSOP and TSSOP.

Corporation

ANALOG EXCELLENCE

Sipex Corporation

Headquarters and

Sales Office

233 South Hillview Drive

Milpitas, CA 95035

TEL: (408) 934-7500

FAX: (408) 935-7600

Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the

application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.

Date: 06/22/04

SP3222EH/3232EH 3.3V, 460 Kbps RS-232 Transceivers

19


型号：	SP3222EHCA-L
厂家：	SIPEX CORPORATION
描述：	Line Transceiver, 2 Func, 2 Driver, 2 Rcvr, PDSO20, LEAD FREE, PLASTIC, SSOP-20 驱动光电二极管接口集成电路驱动器
文件：	总19页 (文件大小：133K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SP3222EHCA-L [SIPEX]

相关型号：

SP3222EHCA-L/TR

SP3222EHCA/TR

SP3222EHCP

SP3222EHCP-L

SP3222EHCT

SP3222EHCT-L

SP3222EHCT/TR

SP3222EHCY

SP3222EHCY-L

SP3222EHCY-L/TR

SP3222EHCY/TR

SP3222EHEA