- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370723 > HTC750XSC (Electronic Theatre Controls, Inc.) Melody Generator PDF資料下載
參數(shù)資料
| 型號： | HTC750XSC |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Melody Generator |
| 中文描述： | 旋律生成器 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大?。?/td> | 149K |
| 代理商： | HTC750XSC |
HIGH TECH
CHIPS, INC.
04/30/00 2
2.0 Functional Description.
We will use schematics above to describe HTC750 operation. At power up HTC750 plays melody set
by dip-switch. After finishing melody it goes into sleep mode and drives all outputs to GND. In
prototypes we build using above schematics current consumption was less then 10uA. This current is
negligible enough to leave circuit constantly powered on. When device is in Sleep mode only way of
waking up the circuit is to recycle power. This is done using S1 pushbutton. Note that we are using
pushbutton with normal closed contacts. When this pushbutton is activated power to HTC750 is cut
down and when this pushbutton is released then part will play the melody. One can use pushbutton
with normal open contacts but it could result partial reproduction of melody.
Note the way CNTL output is used to save energy during Sleep mode. Energy saving is achieved by
cutting power to R1 and R2 resistors when part enters into Sleep mode and preventing battery
discharge through those resistors when associated dip-switch is on. T1 and T2 form simple current
amplifier to drive 8-ohm speaker. Almost any small signal transistor could be used in this amplifier.
Note that this amplifier will introduce additional distortions to amplified signal, because transistors are
not biased. This is done intentionally to simplify amplifier circuit and add one distinct character. This
amplifier does not use any current when its input is driven low. Any other amplifier circuit could be
used as long as care is taken to shut down the amplifier with CNTL output of HTC750 to save buttery.
This could be done by external relay. Quality of sound could be further enhanced if low pass filter is
added to output of HTC750. Please see Application note for HTC750.
Pin out description.
Abbreviations used: O - output, I - input, P - power.
Pin
1
2
3
4
5
6
Name
VDD
NU
NU
D1
D0
CNTL
I / O
P
I
I
I
I
O
Description
Power
Not Used
Not Used
Melody selection input.
Melody selection input.
Control output
Notes
+2.5V to +5.5V
Tie it to GND or VDD.
Tie it to GND or VDD.
Tie it to GND or VDD.
Tie it to GND or VDD.
This output is driven high when part plays
melody. Can deliver up to 25mA current.
Signal on this output is square wave.
Connect to ground.
7
8
MOUT
GND
O
P
Melody output
Ground
3.0 Melody selection with D[0:1]
D1
GND
D0
GND
MELODY
Number 1
GND
VDD
Number 2
VDD
GND
Number 3
VDD
GND
Number 4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HTCM400 | HITAG core module hardware |
| HTD161 | Analog IC |
| HTG12530 | Industrial Control IC |
| HTG12G0 | Hook-Up Wire; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Color:Dark Blue; Approval Bodies:UL, CSA; Approval Categories:UL AWM Style 1015, CSA Type TEW, JQA-F-, Passes VW-1 Flame Test; Conductor Material:Copper RoHS Compliant: Yes |
| HTG12B0 | 4-Bit Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT-C7F | 制造商:Leach International Corporation 功能描述:EM RLY 3PDT/SPDT 60A 115VAC STUD - Bulk |
| HT-C7N | 制造商:Leach International Corporation 功能描述:EM RLY 3PDT/SPDT 60A 28VDC 200OHM STUD - Bulk |
| HT-C7N-060 | 制造商:Leach International Corporation 功能描述:FOKKER 100 AIR LINE - Bulk |
| HTCA200 | 制造商:Electrolube 功能描述:COMPOUND, HEAT TRANSFER, AEROSOL |
| HTC-BCC9 | 制造商:Distributed By MCM 功能描述:Passive Copper Raspberry Pi CPU Heatsink |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。