RTS0073
PLAYBACK / RECORD IC
WITH VOICE-CHANGER FUNCTION
Features
- Operating voltage range: 3.3V - 5.0V
- Connected with an external capactior (Cup), the operating voltage can be improve to 6.4V.
- ADPCM voice recording & playback
- Recording length: 3 seconds (Based on 6K sample rate)
- Several selectable voice effects (transposing voice, robotic voice, original voice)
- Manual control or talk-back mode options are available for recording.
- Built-in voice-recording mic-amplifier
- CNT1 signal drives LED during the recording state
- CNT2 signal drives LED during the playback state
- Low Stand-by current in power OFF mode
General Description
RTS0073 is a CMOS designed with recording and playback function and uses ADPCM technology
to save voice DATA, while providing several voice synthesizers to achieve different voice effects
(robotic, transposing, original). When the voice data is re-playing, RTS0073 has two modes to
select from (manual and playback), and also has a built-in OP amplifier to amplify the input audio
signal. In addition, RTS0073 provides CNT1 and CNT2 pins as recording/playing indicators, or to
use for other purposes.
Pin Assignment Block Diagram
P1B ROB RECB
MODE P2B
P1B 1 28 MICG
P2B 2 27 T2B
ROSC System
RECB 3 26 CNT2 POSC Control SEL
Logic
T1B 4 25 CNT1
MODE 5 24 SEL CNT1
CNT2
BD 6 23 VDD MOUT
MOUT 7 22 ROSC ADPCM
MIN MIC A/D Analyzer &
MIN
RTS007321 POSC Synthesizer SRAM
8
GND 9 20 ROB Amplifier
NC 10 19 NC
NC 11 18 NC
D/A BD
NC 12 17 NC
NC 13 16 NC MICG, T1B, VDD, GND, T2B
NC 14 15 NC
CS-98032 1 Aug/13/1998
V1.6
RTS0073
Absolute Maximum Ratings
Comments*
Never allow a stress to exceed the values listed under
DC Supply Voltage...................................-0.3V to 6.0V "Absolute Maximum Ratings", otherwise the device
Input/Output Voltage...........GND -0.2V to VDD + 0.2V would suffer from a permanent damage. Nor is a stress
Operating temperature..............................-10°C to 60°C at the listed value be allowed to persist over a period,
Storage Temperature..............................-25°C to 125°C since an extended exposure to the absolute maximum
rating condition may also affect the reliability of the
device, if not causing a damage thereof.
Electrical Characteristics
(VDD=4.5V, TA=25°C)
Parameter Symbol Min. Typ. Max. Conditions
Operating Voltage VDD 3.3V 4.5V 5.0V
Operating Current (Record) - - 6mA Unload
IDD
Operating Current (Play back) - - 18mA Unload
Stand-by Current IS - 2µA 5µA
CNT1 Driving Current IC1 6mA - - Voh = 1.8V
CNT2 Driving Current I C2 6mA - - Voh = 1.8V
Output Current For Audio IA 3mA - -
F(4.5V)-F(4.0V) x 100%
Frequency Stability ∆F/F - - 5% F(4.5V)
Frequency Variation ∆F/F - - 15%
CS-98032 2 Aug/13/1998
V1.6
RTS0073
Pin Description
Pin No. Designation Description
In manual mode, pulling this pin low will initiate a play cycle. The chip
1 P1B will play the complete message. In talk-back mode, "P1B" is a useless
pad. (internal pull high)
In manual mode, pulling this pin low will play the recording data, and the
recording data will be played continuously until this pin is pulled to high.
In talk-back mode, "P2B" represents “number of repeating times”
selection pin. Selection table is shown below:
2 P2B
"P2B" pad Total times
Floating pad
(internal pull high) 1
Low 2
In manual mode, it will enter recording state when this pad is triggered.
3 RECB In talk-back mode, please reference to function description. (internal pull-
high).
4 T1B Used for testing only
5 MODE Manual control mode or talk-back mode select pin
6 BD Audio output pin
7 MOUT Microphone amplifier output
8 MIN Microphone signal input pin
9 GND Negative power supply
10 - 19 NC No connection
Robotic voice effect is selected when this pin connected to GND.
20 ROB Original voice (transposing voice) effect is selected when this pin is
connected to VDD.
21 POSC Playback oscillator pin
22 ROSC Record oscillator pin
23 VDD Power supply
The voice effects are adjusted by variable resistors when this pin is
24 SEL connected to GND.
Original voice is selected when this pin is connected to VDD.
25 CNT1 Indicate chip is busy processing speech data during recording (active high)
26 CNT2 Indicate chip is busy processing speech data during playback (active high)
27 T2B Used for testing only
N-channel open drain output. It will stay in "LOW" during the recording
28 MICG
state.
CS-98032 3 Aug/13/1998
V1.6
RTS0073
Function Description
(1) Manual control mode (MODE=GND)
A. When RECB pin goes from high to low , RTS0073 begins recording until memory is full,
then uses P1B or P2B pin to playback (P1B: one shot trigger, P2B: level hold trigger).
RECB
250ms 250ms
MICROPHONE Recording Recording
DATA DATA
INPUT
3 sec
CNT1
P1B
Playback Playback Playback
BD DATA DATA DATA
OUTPUT Playback
DATA
CNT2
RECB
250ms
MICROPHONE Recording
INPUT DATA
CNT1
P2B
Playback Playback Playback Playback Playback Playback
BD DATA DATA DATA DATA DATA DATA
OUTPUT Playback
DATA
CNT2
CS-98032 4 Aug/13/1998
V1.6
RTS0073
B. Pressing P1B or P2B during recoding period will end the recording function, then playback the
recording DATA instantly, but it will bypass empty memory DATA.
RECB
250ms
P1B
MICROPHONE Recording DATA
INPUT
2.5 sec
CNT1
BD OUTPUT Playback DATA
2.5 sec
CNT2
RECB
250ms
P2B
MICROPHONE Recording DATA
INPUT
2.5 sec
CNT1
BD OUTPUT Playback DATA Playback DATA Playback
DATA
2.5 sec 2.5 sec 1.2 sec
CNT2
CS-98032 5 Aug/13/1998
V1.6
RTS0073
(2) Talk-Back mode (MODE=VDD)
a. RTS0073 has a Power-ON enable function.
b. RECB pin is a On/Off trigger in talk-back mode.
c. If RTS0073 does not detect any voice, it will power OFF automatically after 15 seconds.
POWER ON ENABLE
POWER ON
RECB
30ms
MICROPHONE Recording Recording
INPUT
1 sec 1 sec 1 sec
CNT1
BD Playback Playback
OUTPUT
CNT2
OSC
stand-by mode
oscillator off
POWER ON
RECB
30ms
15 sec
MICROPHONE Recording Recording
INPUT
1 sec 1 sec 1 sec
CNT1
BD OUTPUT Playback Playback
CNT2
OSC
stand-by mode
oscillator off
CS-98032 6 Aug/13/1998
V1.6
RTS0073
Application Circuit
(VDD = 4.5V)
1.
VDD
Cpower
1M Ω
MIC
Cup
F~
~ 192 KHz 680
1.5M Ω KΩ
28 27 26 25 24 23 22 21 20 19 18 17 16 15
MICG T2B CNT2 CNT1 SEL VDD ROSC POSC ROB NC NC NC NC NC
RTS0073
P1B P2B RECB T1B MODE BD MOUT MIN GND NC NC NC NC NC
1 2 3 4 5 6 7 8 9 10 11 12 13 14
180KΩ
10K Ω
0.1µ F
100P
8050
680 Ω
Note:
Cpower: POWER FILTER Cpower = 0.1µF ~ 10 µF
Cup: If connecting a capacitor near the VDD and GND pin, it can improve the operating voltage up
to 6.4V. Cup = 0.1µF
CS-98032 7 Aug/13/1998
V1.6
RTS0073
2.
Cpower VDD
1M Ω
Cup
10K Ω
F~
~ 192 KHz 680
1.5M Ω KΩ
28 27 26 25 24 23 22 21 20 19 18 17 16 15
MICG T2B CNT2 CNT1 SEL VDD ROSC POSC ROB NC NC NC NC NC
RTS0073
P1B P2B RECB T1B MODE BD MOUT MIN GND NC NC NC NC NC
1 2 3 4 5 6 7 8 9 10 11 12 13 14
180KΩ
100P
0.1µ F
8050
680Ω
Note:
Cpower: POWER FILTER Cpower = 0.1µF ~ 10 µF
Cup: If connecting a capacitor near the VDD and GND pin, it can improve the operating voltage up
to 6.4V. Cup = 0.1µF
CS-98032 8 Aug/13/1998
V1.6
RTS0073
Bonding Diagram
Designation X Y
BD T1B P2B P1B T2B CNT1 SEL P1B 794.8 1585.0
MODE RECB MICG CNT2 VDD P2B 679.8 1585.0
RECB 564.8 1585.0
T1B 449.8 1585.0
MOUT ROSC MODE 334.8 1585.0
BD 194.8 1585.0
MIN POSC MOUT 85.0 1303.5
MIN 85.0 1188.5
GND ROB GND 85.0 1073.5
ROB 1585.0 1073.5
POSC 1585.0 1188.5
about ROSC 1585.0 1303.5
1.67mm VDD 1585.0 1418.5
RTS0073 SEL 1369.8 1585.0
CNT1 1254.8 1585.0
CNT2 1139.8 1585.0
T2B 1024.8 1585.0
MICG 909.8 1585.0
Unit: in um
X: 1670 Y: 1670
Note: Substrate is connected to GND
about 1.67 mm
Notice: REALTEK's products are sold by description only, REALTEK reserves the rights to make changes in circuit design and/or specification at any time
without notice. Accordingly, the reader is cautioned to make sure the latest version of data sheets are available before placing orders.
REALTEK Semiconductor Corp.
HEAD OFFICE: OFFICE:
1F, NO. 11, INDUSTRY E. RD. IX, 3F, NO. 56 WU-KUNG 6 RD.,
SCIENCE-BASED INDUSTRIAL PARK, WU-KU INDUSTRIAL PARK,
HSINCHU, 300 TAIWAN, R.O.C. TAIPEI HSIEN, TAIWAN, R.O.C.
TEL:886-3-5780211 TEL:886-2-2980098
FAX:886-3-5776047 FAX:886-2-2980097
CS-98032 9 Aug/13/1998
V1.6
