PT8A977B/978B/978BL
5-Function Remote Controller
PT0085-10 07/06/2012
7
12-07-0007
AC Electrical Characteristics
AC Electrical Characteristics of 977B
AC Electrical Characteristics of 978B/978BL
Parameters
Description
Test Condition Min. Type Max. Units
fOSC
Oscillator Frequency *
t
FUN Cycle Time of Function Code
t
STA
Cycle Time of Start Code
Carrier Frequency of SC Pin
T
A= 25
o
C, R = 200 kΩ 102 128 154 kHz
f
OSC = 102 to 154 kHz 0.8 1 1.2 ms
f
OSC = 102 to 154 kHz 1.6 2 2.4 ms
f
OSC = 102 to 154 kHz 51 64 77 kHz
f
CSC
Oscillator Frequency Fluctuation
T
A=25
o
C, V
CC
= 1.8 ~ 5V 15 kHz
f
max
-f
min
Parameters
Description
Test Condition Min. Type Max. Units
fOSC
Oscillator Frequency *
tFUN Cycle Time of Function Code
t
STA
Cycle Time of Start Code
f
OSC = 128 kHz 0.75 1 1.25 ms
f
OSC = 128 kHz 1.5 2 2.5 ms
T
A= 25
o
C, R = 200 kΩ 102 128 154 kHz
VSI
SI Pin Receive Sensitivity (VPP)
Guaranteed Effective Decoding 300 mV
Oscillator Frequency Fluctuation - 978B
Oscillator Frequency Fluctuation - 978BL
T
A=25
o
C, V
CC
=2.5 ~ 5V 15 kHz
f
max
-f
min
TA=25
o
C, V
CC
=2.0 ~ 5V 10 kHz
Note: Over the Operating Rating, 0
o
C ≤ T
A
≤ 70
o
C, V
CC
= 4V
* The relative error between the frequencies of the two on-chip oscillators in the PT8A977B and
PT8A978B (or 978BL) must be less than +25%.
Note: Over the Operating Rating, 0
o
C ≤ T
A
≤ 70
o
C, V
CC
= 4V
* The relative error between the frequencies of the two on-chip oscillators in the PT8A977B and PT8A978B
(or 978BL) must be less than +25%.
