LC737212 Sanyo Semiconductor Corporation, LC737212 Datasheet
LC737212
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LC737212 Summary of contents
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... Ordering number : EN5203203 Telephone Dialer IC with On-Chip Memory for Push- Overview The LC737212 and LC737212M are CMOS LSI telephone dialers for pushbutton telephones. They support both DTMF and pulse dialing. These products include 25 16-digit memories for storing telephone numbers and one ...
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... V All input pins IH Input low-level voltage V All input pins IL Key contact resistance R KI Keypad capacitance Center frequency = 3.579545 MHz Oscillator element rating R S LC737212, 737212M unit: mm 3129-MFP36SD SANYO: DIP36S Symbol Conditions V max DD V max IN max OUT Pd max Ta 70 ˚C P min ...
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... KST tone frequency Memory store confirmation T KSTON tone output time Low tone amplitude Tone output ratio dBCR V Tone output distortion DIS V V Oscillator start time T START V LC737212, 737212M Conditions = 3 3 1 and 1 ...
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... Output frequency [Hz] Input Deviation [%] Standard LC737212 R1 697 697.0 R2 770 770.1 R3 852 852.3 R4 941 942.0 C1 1209 1209.3 C2 1336 1335.7 C3 1477 1476.7 C4 1633 1633.0 Pin Assignment LC737212, 737212M Interdigit Make pause percent 834.2 ms 33.2% 525.2 ms 33.2% 834.2 ms 39.2% 525.2 ms 39.2% +0.01 –0.02 –0.03 –0.11 –0.03 +0.03 +0.02 +0.00 Top view No. 5203-4/27 ...
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... Block Diagram LC737212, 737212M No. 5203-5/27 ...
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... C1 Key Matrix Functions (when the SOUT-ENA pin is high) Digits Dialing data * and #: DTMF dialing data In pulse mode, the * key switches the LC737212/M to DTMF mode. F: Flash (0.71 second) M: Quick-dialing address specification (only in the on-hook state, sets up memory store mode) R/P: Redial, pause (3.9 seconds), clear the paused state ...
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... These are the one-touch auto-dialing keys. Pressing one of these keys outputs the corresponding memory data from the DP and DTMF pins. • Keys These are user-defined keys. When one of these keys is pressed, the LC737212/M outputs the corresponding status and key code from the serial interface. LC737212, 737212M ...
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... DP Dialing pulse output; n-channel open drain output 26 K-TONE K-tone output; complementary output 27 HOOK-CTL Hook control output; complementary output 28 HOLD-OUT Hold mode output; complementary output 29 DISCON IN Disconnect input Column inputs LC737212, 737212M Function No. 5203-8/27 ...
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... DISCON IN Setting this pin low switches the LC737212/M to low power mode and forcibly stops the oscillator circuit. All outputs are turned off in low power mode. (The n-channel open-drain outputs go to the high-impedance state, and the complementary outputs go low ...
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... The DP and K-TONE muting output. This output is turned on in synchronization with the dialing pulse and K-TONE outputs. This is an n-channel open-drain output. The wired OR with the MUTE2 output can be taken. • S-OUT The serial data output. This pin is used to output the internal status of the LC737212/M and the keypad data. This is an n-channel open-drain output. • DP The dialing pulse output. This is an n-channel open-drain output. • ...
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... Pin Internal Circuit Pin No. Pin SOUT-ENA HOLDOFF IN ON-HOOKDIAL IN SI/KEY OFF-HOOK 17 DPR 29 P/T BMR OF/ON-HOOK STORE DISCON OUT MUTE2 MUTE1 S-OUT DP SP-CTL 20 K-TINE HOOK-CTL HOLD-OUT 21 DTMF LC737212, 737212M Internal equivalent circuit No. 5203-11/27 ...
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... Normal dialing including mode changes (pulse mode at the start of the operation) Using the P/T switch Store (pulse mode) Quick dialing Readout Memory store and readout Store (tone mode) One-touch dialing Readout Timing Charts Pulse dialing LC737212, 737212M : Off hook . Dn: Tone output Key Input R/P ...
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... DTMF dialing Flash operation Pulse/tone mixed dialing After the pulse dialing (including IDP) has completed, when DTMF key input operations are performed, DTMF signals are output continuously while keys are pressed. LC737212, 737212M No. 5203-13/27 ...
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... If a DTMF key operation is performed during dialing pulse output (including IDP), the K-TONE signal will be output continuously while keys are pressed. Then, after the pulse dialing completes, the LC737212/M will pause for 3.9 seconds and then output the DTMF signals. LC737212, 737212M ...
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... The output pulse make percentage in pulse mode can be specified to be 33.2 or 39.3% with the BMR pin. The output pulse rate in pulse mode can be set pps with the DPR pin. The LC737212 can generate 12 DTMF dialing signals in DTMF mode. (If serial input is used, it can generate 16 DTMF dialing signals.) DTMF signals are output continuously as long as the corresponding key is held down ...
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... Each of these dialing memory locations holds 16 digits of dialing data plus the output format (pulse or DTMF) for the start of the data. — When a dialing memory location is accessed, its content is copied to RD memory and then the LC737212/M dials that number by reading it out of RD memory. ...
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... Off-hook key acquisition mode, on-hook dialing key acquisition mode, and monitor key acquisition mode — In modes that allow dial output, entering a code value of 20 over the serial interface will switch the LC737212/M to the corresponding key acquisition mode. — Even if the LC737212 key acquisition mode, dialing data entered over the serial interface will be dialed. ...
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... Indicates the key data write type. Pulse = 1, DTMF = 0 D13 Indicates dialing output. Output in progress = 1, output done = 0. D12 Upper bit of the IC internal status D11 D10 Lower four bits of the IC internal status Key code KCU Key code KCL D1 D0 LC737212, 737212M No. 5203-18/27 ...
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... HOLD STORE R LC737212, 737212M KEY CODE ...
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... If a redial operation is attempted when redial is disabled (when the last number dialed exceeded 63 digits) the status when dialing completed is output as serial data. * Timing Chart · From the standby state to off hook, and then to off-hook dialing · With the P/T switch set to P LC737212, 737212M KEY CODE ...
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... The data consists of 8 bits. — Codes other than the 40 codes defined as keypad keys are defined as input data codes in the serial input. — This allows controls other than the DPR and BMR controls to be input serially LC737212, 737212M ...
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... Clears all memories. This function is enabled in memory store mode. 47 HOLD Identical to the HOLD key. 48 Undefined 49 STORE Identical to the STORE key. 4A OHD-ON On-hook dial and monitor mode setting (OHD-ON Undefined 4D RDINH Disables redial. LC737212, 737212M Function or operation 1D: Digits digits Continued on next page No. 5203-22/27 ...
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... Outputs the DTMF signal for C DF Outputs the DTMF signal for D E0 Sets the S-OUT output off E1 Sets the S-OUT output on E2 Sets the HOLD output off E3 Sets the HOLD output on E4 Sets the HK-CTL output off LC737212, 737212M Function or operation . Continued on next page No. 5203-23/27 ...
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... All data is grouped into four-bit groups and output. After first outputting the output format (pulse = 1111, DTMF = 1110), the LC737212/M outputs the dial data. The data value 0000 indicates that output has completed. — See item (9) concerning serial output on page 17 for details on the output format for the data from the S-OUT pin. ...
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... Note that codes marked as undefined in the serial code table are ignored. • Notes on serial input usage — If the SI/KEY pin is switched from low to high and then to low again while a key is pressed, the LC737212/M will receive two key presses for that key. ...
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... Status Diagram Basic functions Key acquisition mode LC737212, 737212M No. 5203-26/27 ...
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... 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 February, 1998. Specifications and information herein are subject to change without notice. LC737212, 737212M PS No. 5203-27/27 ...