SP3080E datasheet(6/21 Pages) SIPEX

6 / 21 page

Rev N 9/15/2006

SP3080E Advanced RS485 Transceivers

TIMING CHARACTERISTICS

SP3080E

Conditions

Min. Typ. Max. Unit

DRIVER CHARACTERISTICS:

Data Signaling Rate (1 / tUI)

Duty Cycle 40 to 60%

115

Kbps

Driver Propagation Delay (tPHL, tPLH)

RL = 54Ω, CL = 50pF,

Figure 3

500 1000 2600

Driver Output Rise/Fall Time (tR, tF)

667

800 2500

Driver Differential Skew (tPLH – tPHL)

40 ±200

Driver Enable to Output High (tDZH)

SP3080E

Figure 4, 5

3500

Driver Enable to Output Low (tDZL)

3500

Driver Disable from Output High (tDHZ)

100

Driver Disable from Output Low (tDLZ)

100

Shutdown to Driver Output Valid (tDZV)

Figure 5

6000

Receiver CHARACTERISTICS:

Conditions

Min. Typ. Max. Unit

Receiver Prop. Delay

CL = 15pF, VID = ±2V,

Figure 6

200

Differential Receiver Skew

±30

Receiver Output Rise/Fall Time

CL = 15pf

Receiver Enable to Output High (tZH)

Figure 7, 8

Receiver Enable to Output Low (tZL)

Figure 7, 8

Receiver Disable from High (tHZ)

Figure 7, 8

Receiver Disable from Low (tLZ)

Figure 7, 8

Shutdown to Receiver Output Valid (tROV)

3500

Time to Shutdown, Note 3,5

200 600

Unless otherwise stated, VCC=5V±10%, TAMB= TMIN to TMAX. Typical values at TAMB=25ºC

Notes:

1. Change in Magnitude of Differential Output Voltage and Change in Magnitude of Common Mode Output Voltage are the changes in output voltage

when DI input changes state.

3. The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns the device does not enter

shutdown. If the enable inputs are held in this state for at least 600ns the device will be in shutdown. In this low power mode most circuitry is disabled

and supply current is typically 650nA.

4.Hot-swap circuit adds pull-down resistance to ﬁrst DE or RE transition.

5. Characterized, Not 100% tested

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Thermal Shutdown Temperature

Junction temperature

165

Thermal Shutdown Hysteresis

ESD Protection for A, B, Y, Z pins

IEC 1000-4-2 Air Discharge

±15

IEC 1000-4-2 Contact

±8

Human Body Model

±15

ESD Protection for RO, DI, DE, RE pins

Human Body Model

±2

ELECTRICAL CHARACTERISTICS

Unless otherwise stated, VCC=5V±10%, TAMB= TMIN to TMAX. Typical values at TAMB=25ºC

Notes:

1. Change in Magnitude of Differential Output Voltage and Change in Magnitude of Common Mode Output Voltage are the changes in output voltage

when DI input changes state.

3. The transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns the device does not enter

shutdown. If the enable inputs are held in this state for at least 600ns the device will be in shutdown. In this low power mode most circuitry is disabled

and supply current is typically 650nA.

4.Hot-swap circuit adds pull-down resistance to ﬁrst DE or RE transition.

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