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參數資料
| 型號： | 75T2089 |
| 廠商： | TDK Corporation |
| 英文描述： | DTMF Transceivers |
| 中文描述： | 雙音多頻收發器 |
| 文件頁數： | 1/9頁 |
| 文件大?。?/td> | 75K |
| 代理商： | 75T2089 |
75T2089/2090/2091
DTMF Transceivers
April 2000
DESCRIPTION
TDK
complete
Transceivers that can both generate and detect all
16 DTMF tone-pairs. These ICs integrate the
performance-proven 75T202 DTMF receiver with a
DTMF generator circuit.
Semiconductor’s
Dual-Tone
75T2089/2090/2091
Multifrequency
are
(DTMF)
The DTMF receiver electrical characteristics are
identical
to
the
standard
characteristics. The DTMF generator provides
performance similar to the Mostek MK5380, but with
an improved (tighter) output amplitude range
specification and with the addition of independent
latch and reset controls.
75T202
device
An additional feature of the 75T2090/2091 is
"imprecise" call progress detector. The detector
detects the presence of signals in the 305-640 Hz
band.
(continued)
FEATURES
DTMF Generator and Receiver on one-chip
Call progress detection (2090/2091 only)
Early detect output (2091 only)
DTMF Receiver exhibits excellent speech
immunity
Analog input range from -32 to -2 dBm
(ref 600
W
)
Three-state outputs (4-bit hexadecimal) from
DTMF Receiver
AC coupled, internally biased analog input
Latched DTMF Generator inputs
DTMF output typ. -8 dBm (Low Band) and
-5.5 dBm (High Band)
Easy interface for microprocessor dialing
Uses inexpensive 3.579545 MHz crystal for
reference
Low-power 5 volt CMOS
BLOCK DIAGRAM
ICLOCK
ATB
XEN
RS
X1
XOUT
XIN
LIN
(2090/2091 only)
D7
D6
D5
D4
LATCH
RESET
DIN
Vp
Vn
DE
D0
D1
D2
D3
DV
ED
DTMF
DET
(2090/2091 only)
POWER REGULATOR
VREF
BS1
BS2
697
770
852
941
1209
1336
1477
1633
BANDPASS
FILTERS
AMPLITUDE
DETECTORS
BFILTERS
Vp
Vp
Vp
D
Q
D
Q
D
Q
D
Q
CK
CK
D
Q
CLR
DTMF
GENERATOR
BANDSPLIT
FILTERS
8
Vp
ENERGY
DETECTOR
Vp
CTIMING
DV
STROBE
DV
F.F.
OUTPUT
DEAND
REGISTER
相關PDF資料 |
PDF描述 |
|---|---|
| 75T2090 | DTMF Transceivers |
| 75T2090-IP | DTMF Transceivers |
| 75T2091 | DTMF Transceivers |
| 75T2091-IH | DTMF Transceivers |
| 75V16F64GS16 | 64 Mbit FLASH MEMORY AND 16 Mbit PSEUDO SRAM STACKED MULTI-CHIP PACKAGE (MCP) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 75T2089-IP | 制造商:TDK 功能描述:75T2089-IP |
| 75T2090 | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:DTMF Transceivers |
| 75T2090-IP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DTMF TRANSCEIVERS |
| 75T2091 | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:DTMF Transceivers |
| 75T2091-IH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DTMF TRANSCEIVERS |
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