HT8A978BPE 데이터 시트보기 (PDF) - TY Semiconductor

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HT8A978BPE

HT8A977B works as encoder and HT8A978B works as decoder

TY Semiconductor 

AC Electrical Characteristics

AC Electrical Characteristics of 977B

Parameters

Description

fOSC

Oscillator Frequency *

Test Condition

TA= 25oC, R = 200 kΩ

Product specification

HT8A977

Min. Type Max. Units

102 128 154

kHz

fmax-fmin Oscillator Frequency Fluctuation TA=25oC, VCC= 1.8 ~ 5V

15

kHz

tFUN

Cycle Time of Function Code

fOSC = 102 to 154 kHz

0.8 1

1.2

ms

tSTA

Cycle Time of Start Code

fOSC = 102 to 154 kHz

1.6 2

2.4

ms

fCSC

Carrier Frequency of SC Pin

fOSC = 102 to 154 kHz

51 64 77

kHz

Note: Over the Operating Rating, 0oC ≤ TA ≤ 70oC, VCC = 4V

* The relative error between the frequencies of the two on-chip oscillators in the HT8A977B and

HT8A978B must be less than +25%.

AC Electrical Characteristics of 978B

Parameters

Description

fOSC

fmax-fmin

Oscillator Frequency *

Oscillator Frequency Fluctuation -

978B

Oscillator Frequency Fluctuation -

978BL

VSI

SI Pin Receive Sensitivity (VPP)

tFUN

Cycle Time of Function Code

tSTA

Cycle Time of Start Code

Test Condition

Min. Type Max. Units

TA= 25oC, R = 200 kΩ 102 128 154 kHz

TA=25oC, VCC=2.5 ~ 5V

15 kHz

TA=25oC, V =2.0 ~ 5V

10 kHz

Guaranteed Effective 300

mV

Decoding

fOSC = 128 kHz

fOSC = 128 kHz

0.75 1 1.25 ms

1.5 2 2.5 ms

Note: Over the Operating Rating, 0oC ≤ TA ≤ 70oC, VCC = 4V

* The relative error between the frequencies of the two on-chip oscillators in the HT8A977B and

HT8A978B must be less than +25%.

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