View LC73862_158518.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Ordering number: EN4431A
CMOS LSI
LC73861, LC73862 DTMF Receiver LSI
Overview
The LC73861 and LC73862 are DTMF signal detector receiver that incorporates all the necessary filters for telephone answering machines.
Package Dimensions
unit : mm
3001B-DIP8
[LC73861, LC73862]
Features
. 16-DTMF tone signal decoder . DTMF receiver with all necessary filters built-in . Dial tone filter . High-group bandpass filter . Low-group bandpass . Extended dynamic range filter . Serial data output . Microcontroller guard-time compatible . 4.5 to 5.5 V operating supply voltage range
Specifications
Absolute Maximum Ratings at Ta = 25C, VSS = 0 V
Parameter Maximum supply voltage Maximum input voltage Maximum input current Maximum output voltage Allowable power dissipation Operating temperature Storage temperature Symbol VDD max VIN max IIN max VOUT max Pd max Topr Tstg Ta % 85C Conditions Ratings
SANYO : DIP8
Unit V V mA V mW C C
-0.3 to +6.0 -0.3 to VDD +0.3 -10 to +10 -0.3 to VDD +0.3 500 -40 to +85 -50 to +125
Allowable Operating Conditions at Ta = -40C to +85C, VSS = 0 V
Parameter Operating supply voltage High-level input voltage Low-level input voltage Symbol VDD VIH VIL Conditions ACK pin ACK pin min 4.5 0.7VDD typ max 5.5 0.3VDD Unit V V V
DC Electrical Characteristics at Ta = 25C 2C, VDD = 5 V, VSS = 0 V
Parameter Operating supply current High-level output current Low-level output current Input impedance Symbol IDD(op) IOH IOL Zin Conditions VOUT = 4.6 V, SD and EST pins VOUT = 0.4 V, SD and EST pins INPUT pin min typ 3 max 7 -0.4 Unit mA mA mA k
1 10
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
93097HA(II)/90793JN B8-0375 No.4431-1/5
LC73861, LC73862
AC Electrical Characteristics at Ta = 25C 2C, VDD = 5 V, VSS = 0 V, fOSC = 4.194304 MHz
Parameter Valid input signal level Positive twist accept Frequency deviation accept Frequency deviation reject Third tone tolerance Dial tone tolerance Noise tolerance Tone present detect time Tone absent detect time Data shift rate Data output delay time Setup time delay Data hold time Oscillator frequency Load capacitance Symbol See See See See See See See See See Conditions notes 1, 2, 3, 5, 6 and 9. notes 2, 3, 4, 9 and 11. notes 2, 3, 5 and 9. notes 2, 3 and 5. notes 2, 3, 4, 5, 9 and 10. notes 2, 3, 4, 5, 8, 9 and 10. notes 2, 3, 4, 5, 7, 9 and 10. Timing Chart. Timing Chart. min -49.5 1.5% 2 3.5 -16 22 -12 3 0.5 20 20 1 typ 6 max 0 Unit dBm dB Hz % dB dB dB ms ms MHz ns ns ns MHz MHz pF
tDP tDA tPAD tDL tDH fOSC CXO
See Timing Chart. See Timing Chart. See Timing Chart. LC73861 LC73862 OSCI and OSCO
100 0 30 4.190109 4.194304 4.198498 3.5759 3.5795 3.5831 30
Notes 1. 0 dBm = 1 mW power when driving a 600 load. 2. All 16 DTMF signal frequencies. 3. 40 ms DTMF signal period and 40 ms pause period. 4. Nominal DTMF frequency. 5. Low-frequency group and High-frequency group signal levels are the same. 6. DTMF signal frequency deviation is within 1.5% 2 Hz. 7. Bandwidth limited (0 to 3 kHz) Gaussian noise. 8. 350 Hz and 440 Hz dial tone frequencies. 9. Error rate of less than 1 in 10,000. 10. Referenced to the lowest frequency component of the DTMF signal. 11. Twist = High-frequency group tone level / Low-frequency group tone level.
Pin Assignment
Top view
Pin Description
Number 1 2 3 4 5 6 7 8 Name INPUT OSCO OSCI VSS SD ACK EST VDD O I O O I/O I O I Description Input coupling capacitor required. Biased internally to VDD/2. An oscillating circuit is formed by connecting a 4.194304 MHz (LC73861) / 3.579545 MHz (LC73826) oscillator and a capacitor (if needed) between these pins. (To determine whether an external capacitor is needed or not, contact the manufacturer of the oscillator.) Supply pin, normally 0 V Outputs 4-bit serial decoded DTMF output, least significant bit first. The ACK pin is used to shift out data to the SD pin. Four pulses are needed in order to shift out the 4-bit DTMF code. The data is latched by the shift register before the rising edge of the first pulse. Indicates the presence of a DTMF signal when HIGH. (This pin can be monitored and after a short delay, data can be accessed by 4 pulses to ACK.) Supply pin, normally 4.5 V to 5.5 V
No.4431-2/5
LC73861, LC73862
Output Code Table
FL 697 697 697 770 770 770 852 852 852 941 941 941 697 770 852 941 FH 1209 1336 1477 1209 1336 1477 1209 1336 1477 1336 1209 1477 1633 1633 1633 1633 # A B C D KEY 1 2 3 4 5 6 7 8 9 0 b3 L L L L L L L H H H H H H H H L b2 L L L H H H H L L L L H H H H L b1 L H H L L H H L L H H L L H H L b0 H L H L H L H L H L H L H L H L
DTMF Dialing Matrix
Timing Chart
No.4431-3/5
LC73861, LC73862
Equivalent Block Diagram
Bias generator
Signal discriminator
Anti-aliasing filter
Dial-tone filter
Timing generator
Low-frequency group bandpass filter
Frequency detector
Code converter and latch
High-frequency group bandpass filter
Frequency detector
Output signal control circuit
Shift register
Test Circuit / Sample Application Circuit
No.4431-4/5
LC73861, LC73862
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: 2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of September, 1997. Specifications and information herein are subject to change without notice.
No.4431-5/5

▲Up To Search▲

Price & Availability of LC73862

	To Download LC73862 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .