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參數(shù)資料
| 型號： | HM9270C |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | DTMF Receiver(集成了濾波器和數(shù)字譯碼器功能的雙音多頻（DTMF）接收器) |
| 中文描述： | 雙音多頻接收器（集成了濾波器和數(shù)字譯碼器功能的雙音多頻（DTMF）的接收器） |
| 文件頁數(shù)： | 5/10頁 |
| 文件大小： | 57K |
| 代理商： | HM9270C |
DTMF RECEIVER
HM 9270C/D
— 5 —
Parameter Description
Min. Typ. Max. Units Notes
TIMING:
t
DP
t
DA
t
REC
t
REC
t
ID
t
DO
Tone Present Detection Time
Tone Absent Detection Time
Tone Duration Accept
Tone Duration Reject
Interdigit Pause Accept
Interdigit Pause Reject
OUTPUTS:
t
PQ
t
PSED
t
QSED
t
PTE
t
PTD
Propagation Delay (St to Q)
Propagation Delay (St to StD)
Output Data Set Up (Q to Std)
Propagation ENABLE
Delay (TOE to Q) DISABLE
CLOCK:
f
CLK
C
LO
Crystal/Clock Frequency
Clock Output Capacitive
(OSC2) Load
Notes
: 1.dBm = decibels above or below a reference power of 1mW into a 600 Ohm load.
2.Digit sequences consists of all 16 DTMF tones.
3.Tone duration = 40mS Tone pause = 40mS.
4.Nominal DTMF frequencies are used.
5.Both tones in the composite signal have an equal amplitude.
6.Tone pair is deviated by
±
1.5%
±
2Hz.
7.Bandwidth limited (3kHz) Gaussian Noise.
8.The precise dial tone frequencies are (350Hz and 440Hz)
±
2%.
9.For an error rate of less than 1 in 10,000.
10.Referenced to the lowest level frequency component in DTMF signal.
11.Added A 0.1
μ
f capacitor between V
DD
and V
SS
.
5
0.5
14
4
16
8.5
40
ms
ms
ms
ms
ms
Refer to “Guard Time
20
Adjustment"
Refer to Fig. 4
(User Adjustable)
Function Description
FIGURE 2. SINGLE ENDED INPUT CONFIGURATION
20
40
ms
8
12
4.5
50
300
11
μ
s
μ
s
μ
s
ns
ns
TOE= V
DD
60
R
L
=10k
C
L
=50pf
3.5759 3.5795
3.581 MHz
30 pf
HM9270C
300
IN+
IN
GS
IC
IC
OSC1
OSC2
V
SS
TOE
StD
St/GT
ESt
K
100
NF
Q4
Q3
Q2
Q1
V
DD
V
REF
100
NF
100
100
3.58
MHz
K
K
5V
0.1
μ
f
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|---|---|
| HM9270D | 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:DTMF RECEIVER |
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| HM94 | 制造商:HSMC 制造商全稱:HSMC 功能描述:PNP EPITAXIAL PLANAR TRANSISTOR |
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| HM9-6516BB6129 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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