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參數(shù)資料
| 型號： | HM9270D |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | DTMF RECEIVER |
| 中文描述： | 雙音多頻接收器 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大小： | 66K |
| 代理商： | HM9270D |
DTMF RECEIVER
HM 9270C/D
- 3 -
Pin
Sym.
Function
11
12
13
14
Q1
Q2
Q3
Q4
15
StD
16
ESt
17
St/GT
18
V
DD
3-state data outputs. When enabled by TOE, provide the code corresponding to the last valid
tone-pair received (see code table).
Delayed steering output. Presents a logic high when a received tone-pair has been registered
and the output latch updated; returns to logic low when the voltage on St/GT falls below
V
TSt
.
Early steering output. Presents a logic high immediately when the digital algorithm detects a
recognizable tone-pair (signal condition). Any momentary loss of signal condition will cause
ESt to return to a logic low.
Steering input/guard time output (bi-directional). A voltage greater than V
detected at St
causes the device to register the detected tone-pair and update the output latch. A voltage
less than V
frees the device to accept a new tone-pair. The GT output acts to reset the
external steering time-constant; its state is a function of ESt and the voltage on St (see truth
table).
Positive power supply, +5Volts.
DC Electrical Characteristics
Parameter Description
SUPPLY:
V
DD
Operating Supply Voltage
I
cc
Operating Supply Current
P
o
Power Consumption
I
S
Standby Current
INPUTS:
V
IL
V
IH
I
IH
/I
IL
I
so
R
IN
Low Level Input Voltage
High Level Input Voltage
Input Leakage Current
Pull Up (Source) Current
Input Signal
Impedance Inputs 1,2
Steering Threshold Voltage
V
TSt
Test Conditions
Min. Typ. Max. Units
4.75
5.25
7
35
100
V
mA
mW
μA
3.0
15
-
f=3.579MHz; V
DD
=5V
PWDN pin = V
DD
-
1.5
V
V
uA
uA
M
3.5
V
=V
or V
TOE (Pin 10)=OV
@ 1kHz
0.1
7.5
10
15
2.35
V
Parameters
Min.
Max.
Units
Power Supply Voltage, V
DD
- V
SS
Voltage on any pin
Current at any pin
Operating temperature
Storage temperature
Package power dissipation
Note
1. Absolute maximum ratings are those values beyond which damage to the device may
occur.
2. Unless otherwise specified, all voltages are referenced to ground.
3. Power dissipation temperature derating: -12
mV
/
oC
from 65
o
C to 85
o
C
6
V
DD
+ 0.3
10
+85
+150
500
V
V
mA
o
C
o
C
mW
V
SS
- 0.3
-40
-65
Absolute Maximum Ratings
(Notes 1, 2 and 3)
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