XR88C681_06 datasheet(8/101 Pages) EXAR

Part #	XR88C681

Description	CMOS Dual Channel UART (DUART)

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Manufacturer	EXAR [Exar Corporation]

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XR88C681

8

Rev. 2.11

DC ELECTRICAL CHARACTERISTICS1, 2, 3

Test Conditions:

TA = 0 - 70°C, VCC = 5V ¦ 5% unless otherwise specified.

Symbol

Parameter

Min.

Typ.

Max.

Unit

Conditions

VIL

Input Low Voltage

0.5

0.8

V

VIH

Input High Voltage

2.0

VCC

V

VIH

Input High Voltage (Military)

2.2

V

TA = -55°C to 125°C

VIHX1

Input High Voltage (X1/CLK)

4.0

VCC

V

VOL

Output Low Voltage

0.4

V

IOL = 2.4mA

VOH

Output High Voltage

2.4

V

IOH = -400 A

IIL

Input Leakage Current

-25

25

A

VIN = 0 to VCC

IILSEL

Select Pin Leakage Current

-30

+30

A

VIN = 0 to VCC

IX1L

X1 Input Low Current

-20

A

VIN = 0

IX2L

X2 Input Low Current

-7

mA

IXIH

X1 Input High Current

20

A

VIN = VCC

IX2H

X2 Input High Current

20

A

VIN = VCC

ILL

Data Bus Tri-State Leakage

Current

-10

10

A

VO = 0 to VCC

IOC

Open Drain Output Leakage

Current

-10

10

A

VO = 0 to VCC

ICCA

Power Supply Current4

6

15

mA

Active Mode

ICCS

Power Supply Current4

3

10

mA

Standby Mode

Notes

1.Parameters are valid over the specified temperature and operating supply ranges. Typical values are 25°C, VCC = 5V and typical

processing parameters.

2.All voltages are referenced to ground (GND). For testing, input signal levels are 0.4V and 2.4V with a transition time of 20ns

maximum. All time measurements are referenced at input voltages of 0.8V and 2.0V as appropriate. See Figure 50.

3.For prime grade N, P, J, L, M, ML, VCC = 5V + 10%.

4.Measured operating with a 3.6864MHz crystal and with all outputs open.

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