UT3243G-R28-T datasheet(5/9 Pages) UTC

5 / 9 page

UT3243

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 9

www.unisonic.com.tw

QW-R502-573.F



ELECTRICAL CHARACTERISTICS(Cont.)

(VCC = +3.0V~+5.5V, C1~C4=0.1µF (Note 2), TA = TMIN to TMAX, Unless Otherwise Specified)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP MAX UNIT

Receiver Positive or

Negative Threshold to

INVALID

High

tINVH

Fig.2

µs

Low

tINVL

µs

RECEIVER INPUTS

Input Voltage Range

VRR

-25

Input Threshold Low

VRINL

TA = 25°C

VCC=3.3V

0.6

1.2

VCC=5.0V

0.8

1.5

Input Threshold High

VRINH

TA = 25°C

VCC=3.3V

1.5

2.4

VCC=5.0V

1.8

2.4

Input Hysteresis

VRINHYS

0.3

Input Resistance

VRINRES TA = 25°C

kΩ

TRANSMITTER OUTPUTS

Output Voltage Swing

VTOUTSW

All transmitter outputs loaded with

3kΩ to ground

±4.8

±5.4

Output Resistance

VTOUTRES

VCC = V+ = V- = 0V,

Transmitter output = ±2V

300

10M

Ω

Output Short-Circuit Current

ITSC

±35

±60

Output Leakage Current

ITOUT(LK) VOUT=±12V, Transmitters disabled

±25

µA

MOUSE DRIVABILITY

Transmitter Output Voltage

VTOUT

T1IN = T2IN = GND, T3IN = VCC,

T3OUT loaded with 3kΩ to GND,

T1OUT and T2OUT loaded with 2.5mA each

±4.8

TIMING CHARACTERISTICS

Maximum Data Rate

RL = 3kΩ, CL = 1000pF,

one transmitter switching

120

235

kbps

Receiver Propagation Delay

tPHL

Receiver input to receiver output,

CL = 150pF

0.3

µs

tPLH

0.3

Receiver Output Time

Enable

tR(EN)

Normal operation

200

Disable

tR(DIS)

200

Transmitter Skew

tTS

|tPHL – tPLH|　

200

1000

Receiver Skew

tRS

|tPHL – tPLH| 　

100

500

Transition-Region Slew Rate

VCC=3.3V, TA=25°C,

RL = 3kΩ ~ 7kΩ,

measured from +3V

~ -3V or -3V ~ +3V

CL = 200pF~2500pF

8.0

V/µs

CL = 200pF~1000pF

Notes: 1. Typical values are at TA = 25°C.

2. C1~C4 = 0.1µF, measured at 3.3V ±10%. C1 = 0.047µF, C2~C4 = 0.33µF, measured at 5.0V ±10%.

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