SC88E43S 데이터 시트보기 (PDF) - Unspecified
부품명
상세내역
제조사
SC88E43S Datasheet PDF : 25 Pages
| |||
Silan
Semiconductors
SC88E43
(continued)
Pin
No.
Symbol
15
FSKen
16
DCLK
17
DATA
18
DR
19
CD
20
INT
21
StD
22
ESt
23
St/GT
24
VDD
I/O
Function
CMOS Input
CMOS
Input/Output
CMOS Output
CMOS Output
CMOS Output
Open Drain
Output
CMOS Output
CMOS Output
Analog Input /
CMOS Output
--
FSK Enable. Must be high for FSK demodulation. This pin should be
set low to prevent the FSK demodulator from reacting to extraneous
signals (such as speech, alert signal and DTMF which are all in the
same frequency band as FSK).
3-wire Interface: Data Clock. In mode 0 (MODE pin low), this pin is an
output. In mode 1 (MODE pin high), this pin is an input.
3-wire Interface: Data. In mode 0 the FSK data appears at the pin
once demodulated. In mode 1 the FSK data is shifted out on the rising
edge of the microcontroller supplied DCLK.
3-wire Interface: Data Ready. Active low. In mode 0 this output goes
low after the last DCLK pulse of each data word. This identifies the 8-
bit word boundary on the serial output stream. Typically, DR is used
to latch 8-bit words from a serial-to-parallel converter into a
microcontroller. In mode 1 this pin will signal the availability of data.
Carrier Detect. Active low. A logic low indicates the presence of in-
band signal at the output of the FSK bandpass filter.
Interrupt. Active low. It is active when TRIGout or DR is low, or
StD is high. This output stays low until all three signals have become
inactive.
Dual Tone Alert Signal Delayed Steering Output. When high, it
indicates that a guard time qualified alert signal has been detected.
Dual Tone Alert Signal Early Steering Output. Alert signal detection
output. Used in conjunction with St/GT and external circuitry to
implement the detect and non-detect guard times.
Dual Tone Alert Signal Steering Input/Guard Time. A voltage greater
than VTGt (see figure 4) at the St/GT pin causes the device to indicate
that a dual tone has been detected by asserting StD high. A voltage
less than VTGt frees the device to accept a new dual tone.
Positive Power Supply.
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.0 2000.12.31
8
Share Link: 