SP2209E datasheet(12/15 Pages) SIPEX

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SP2209E DS/06

SP2209E High ESD Dual Port RS-232 Transceivers

DEVICE PIN

HUMAN BODY

IEC1000-4-2

TESTED

MODEL

Air Discharge

Direct Contact

Level

Driver Outputs

+15kV

+8kV

Receiver Inputs

+15kV

+8kV

Figure 11. ESD Test Circuit for EN61000-4-2

Table 2. Transceiver ESD Tolerance Levels

to Data Circuit Terminating Equipment (DCE)

interface implementation, 2 data lines, TxD and

RxD, and 6 control lines, RTS, DTR, DSR,

CTS, and RI, are required. The straight-through

pinout for data lines in the SP2209E device

allows a simplified PCB layout allowing ground

lines to separate the signal lines and ground

planes to be placed beneath the IC without the

complication of a multi-layer PCB layout.

A receiver from each port, R

5INA and R5INB,

are active while the rest of the channels are

powered down. This allows the SP2209E

device to monitor peripheral devices while the

rest of the system is in a power-saving standby

mode. Fail-Safe receiver outputs are pulled high

if the receiver inputs are left unconnected or at

zero input. The SP2209E device can be

implemented as a power management device to

wake up the entire system when any

communication is initiated in peripheral

devices. The SP2209E device has a low standby

current of 100

µA.

A standard serial mouse can be powered from

the SP2209E drivers. Two driver outputs

connected in parallel and set to V

OH can be used

to supply power to the V+ pin of the mouse. The

third driver is set to VOL to link current from the

V- terminal. Typical mouse specifications are

10mA at +6V and 5mA at -6V.

LapLink Compatibility

The SP2209E can operate up to 460kbps data

rate under maximum driveload conditions of

L = 1000pF and RL = 3KΩ at minimum power

supply voltages.

S and

and R

V add up to 330

add up to 330

Ω

Ω ffor IEC1000-4-2.

or IEC1000-4-2.

RS and RV add up to 330Ω for IEC1000-4-2.

Contact-Discharge Module

RVV

CSS

RSS

SW1

SW2

Device

Under

Test

DC Power

Source

SW1

SW2

Contact-Discharge Module

Figure 12. ESD Test Waveform for EN61000-4-2

t=0ns

t=30ns

15A

30A

t ¥

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