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| KS58006 TONE/PULSE DIALER WITH REDIAL INTRODUCTION The KS58006 is DTMF/PULSE switchable dialer with a 32-digit redial which can be done using a slide switch. All necessary dual-tone frequencies are derived from a 3.579545 MHz TV crystal or ceramic resonator providing very high accuracy and stability. The required sinusoidal wave form for each individual tone is digitally synthesized on the chip. The generated wave form has very low total harmonic distortion (7% max). A voltage reference is generated on the chip which is stable over the operating voltage and temperature range and regulates the single levels of the dual tone to meet telephone industry specifications. CMOS technology is applied to this device, for very low power requirements high noise immunity, and easy interface to a variety of telephones requiring external components. 18-DIP-300A FEATURES * Tone/Pulse switchable (slide switch) * 32-digit capacity for redial * Automatic mix redialing ( last number dial ) of PULSE DTMF with multiple auto access pause * PABX auto-pause for 3.5 sec. * 4 X 4 or ( 2 of 8 ) keyboard available * Two key single tone operation * Operating Voltage : 2.0 ~ 5.5V * Numbers dialed manually after redial are cascadable and stored as additional numbers for next redialing * Uses inexpensive TV crystal or ceramic resonator (3.579545MHz) * Make/Break ratio (33.3 / 66.6) pin selectable * Touch key hooking (604ms) * Low standby current * Improved EMI characteristic * Improved redial memory quality ORDERING INFORMATION Device KS58006N Package 18-DIP-300A Operating Temperature - 20C ~ + 70C PIN CONFIGURATION R1 1 2 3 4 5 6 7 8 9 KA58006 18 17 16 15 14 13 12 11 10 C4 R2 C3 R3 C2 R4 C1 HS DP M/B X'MUTE MDS TONE OUT OSC IN VSS OSC OUT VDD Fig. 1 KS58006 TONE/PULSE DIALER WITH REDIAL BLOCK DIAGRAM HS M/B MDS OPERATION R1 R2 R3 R4 C1 C2 C3 C4 KEYBOARD LOGIC RED IAL MEMORY 32 DIGIT INPUT LOGIC OUPUT LOGIC MDO KIT X'MUTE MUTE DP CONTROL LOGIC V DD OSC DTMF GENERATOR TONE OUT OSC IN OSC OUT VSS Fig. 2 ARRANGEMENT OF KEYBOARD 1 2 3 R1 TONE FREQUENCIES Input R1 Specified 697 770 852 941 1209 1336 1477 Actual 699.1 766.2 847.4 948.0 1215.7 1331.7 1471.9 % Error + 0.31 - 0.49 - 0.54 + 0.74 + 0.57 - 0.32 - 0.35 4 5 6 HK R2 R2 R3 7 8 9 P R3 R4 C1 C2 * 0 # RD R4 C1 C2 C3 C4 C3 * KEYBOARD DESCRIPTION HK P RD : HOOKING (604ms) : PAUSE (3.5 second) : REDIAL KS58006 TONE/PULSE DIALER WITH REDIAL PIN DESCRIPTION Pin No Symbol Description Keyboard (R1, R2, R3, R4, C1, C2, C3, C4) These inputs can be interfaced to an XY matrix keyboard. C1-C4 & R1-R4 are set to low at On Hook (HS = high). C1-C4 key inputs are set 1- 4 15 -18 R1 - R4 C1 - C4 to low and R1-R4 are set to high at OFF HOOK (HS = low) which enables the keyinput operation. The oscillator starts running when a keypress is detected. Scanning signals are presented at both column and row inputs (TYP : 437Hz) until the input key is released. Key inputs are compatible with standard 2-of-8 form or single-contact keyboard. Debouncing is provided to avoid false entry (TYP : 4mS). Hook Switch 5 HS This input detects the state of the hook switch contack. "Off Hook" corresponds to VSS condition. "On Hook" corresponds to VDD condition. Make/Break Ratio 6 M/B This input provides the selection of the Make/Break ratio (33.3: 66.6/40:60) when M/B is connected to VDD/VSS. Mode Select Input Pulse/DTMF mode is selected as shown is the following table. Initial Mode means the state after going Off Hook (HS "VSS") 7 MDS MDS INITAL MODE Pulse Tone SWITCHING ENTRY MODE MDS Input = VSS N/A VDD VSS Oscillator Input/Output 8-9 OSC IN OSC OUT These pins are provided to connect an external 3.58MHz crystal. Oscillator starts (at Off Hook) and is sustained unitl pulse or DTMF signals are finished. Power These are the power supply inputs. The device is designed to be operated on 2.0V to 5.5V DTMF Signal Output When a valid keypress is detected in DTMF mode, appropriate low and high group frequencies are generated which hybrid the Dual Tone Output. Tone out is Off State in pulse mode. X' MUTE Output HS X' MUTE Output "ON" Normally "OFF" "ON" during pulse and DTMF dialing 10 - 11 VDD, VSS 12 TONE OUT 13 X' MUTE VDD VSS (N channel open drain) Dial Pulse Out 14 DP DP : The normal output will be "ON" during break and "OFF" during make at "OFF HOOK". The output will be "OFF" at "ON HOOK". KS58006 TONE/PULSE DIALER WITH REDIAL ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage Input Voltage Output Voltage Output Voltage Tone Output Current Power Dissipation Operating Temperature Storage Temperature Symbol VDD VI VO VO (DXM) IO (TONE) PD T OPR T STG Value 6.0 VSS - 0.3, VDD + 0.3 VSS - 0.3, VDD + 0.3 VDD (DP, X' MUTE, MUTE) 50 500 - 20 ~ + 70 - 40 ~ + 125 Unit V V V V mA mW C C ELECTRICAL CHARACTERISTICS (VSS = 0V, VDD = 3.5V, fX'TAL = 3.579545MHz, Ta = 25C, unless otherwise noted) Characteristic Operating Voltage Range Memory Retention Voltage Memory Retention Current Operating Current IDD (TONE) Symbol VDD VMR IMR IDD (PULSE) MDS = VDD MDS = VSS HS = VDD = 1.0V One key selected HS=VSS, All outputs Unloaded No key selected. All outputs unloaded VDD = 3.5V VDD = 2.5V 1.7 0.5 0.8VDD VSS R1-R4 23 5 110 110 437 3.5 ROW TONE ONLY VDD = 2.5V, RL = 5K VDD = 3.5V, RL = 5K VDD = 3.5V VDD = 3.5V 1.5 -14.0 -14.0 1.0 2.0 -12.0 -12.0 3.0 7 dBV dB % mS Test Conditions Min 2.0 1.0 0.05 0.1 0.4 0.1 0.3 mA 0.7 A Typ Max 5.5 Unit V V A Standby Current ISB HS = VSS 10 50 Output Current IOL1 IOL2 VIH VIL IL1 IL2 tKD tKR tTD tTIDP fCR tAP VO(TONE) dBCR THD tD(TONE) DP, X' MUTE VOL = 0.4V 5.0 1.5 VDD 0.2VDD 50 30 mA Input Voltage Input Current Valid Key Entry Time Key Release Time Tone Duration Tone Interdigit Pause Time Column and Row Scanning Frequency Auto Access Pause Time Tone Output Ratio of Column to Row Tone Distortion Tone Output Delay Time R1-R4, C1-C3, HS, M/B MDS VDD = 3.5V, VIN = 0V VDD = 2.5V, VIN = 0V V A mS mS mS mS Hz sec KS58006 TONE/PULSE DIALER WITH REDIAL APPLICATION INFORMATION KEYBOARD OPERATION 1. SINGLE MODE OPERATION Pulse Mode Operation Off Hook D1 . . . Dn D1 key entry. This is the condition The pulse mode is defined by the initial mode after going off Hook and latched at under MDS = VDD. Tone Mode Operation Off Hook D1 . . . Dn The tone mode is defined by the initial mode after going off Hook and latched at D1 key entry. This is the condition under MDS = VSS. Manual Dialing with Automatic Access Pause Off Hook D P D1 . . . Dn Multiple Pause key entries can be accepted and stored in the redial memory, each as a digit. Each P key provides 3.5 seconds pause time, but the P key entry as the first digit after going Off Hook is ignored. The * key can also be used as a pause key in the pulse mode. Pause (2) can be cancelled with the P or RD key during pause time in redialing. = Any numeric key. D Redialing Off Hook RD Up to 32 digits can be dialed with the RD key. The RD key is disabled while pulse or DTMF signals are transmitted. When more than 32 digits are stored, redial is also inhibited. The # key can be used as the RD key in the pulse mode. Inhibiting Redial Off Hook D1 . . . Dn RD RD Redial can be inhibited by depressing the RD key twice after DTMF or pulse signals are transmitted. KS58006 TONE/PULSE DIALER WITH REDIAL 2. PULSE/TONE SWITCHABLE OPERATION Mode Switching by MDS Input Off Hook D1 . . . Dn P Switching MDS to VSS Pulse Mode Dn+1 . . . DN+m DTMF Mode The pulse mode is initially defined MDS = VDD, mode switching to the DTMF mode can be accepted by MDS = VSS, the DTMF mode will be set up after the pulse mode is finished. In this mode, digits Dn + 1 ... Dn + m are transmitted from Tone Out as DTMF signals by depressing the corresponding keys. If no P key is contained serially before or after mode switching, the following condition is obtained. Off Hook D1 . . . Dn Switching MDS to VSS Dn+1 . . . Dn+m Pulse Mode (Dn+1Pause) DTMF Mode Dn+1 is depressed after the pulse mode is finished, the DTMF mode will be set up after last the pulse signal ( Dn ) is generated. In this mode,digits Dn+1 ... Dn+m are transmitted from Tone Out as DTMF signals by depressing the corresponding keys. If digit Dn+1 is depressed during dialing pulse signals. What happens? When the DTMF If digit mode is set, the Hold State will be set after last pulse signal Dn is finished. MDO will flash to indicate this Hold State, Dn+1 ... Dn+m are stored in redial memory as DTMF DATA and not transmitted from Tone Out. When it is ready to transmit DTMF data in redial memory, the RD or P key is depressed to reset this Hold State and Dn+1 ... Dn+m data are serially transmitted. KS58006 TONE/PULSE DIALER WITH REDIAL TONE MODE TIMING (MDS = VSS) KEY INPUT 4 3 . RD tTID P 4 TONE 3 . tT IDP tTIDP X'MUTE Fig. 3 PULSE MODE TIMING (MDS = VDD) HS D KEY INPUT 2 3 P Swi tching MS = V S S * 2 1 8 DP tT D TONE OUT tTIDP X'MUTE t PA MDS Fig. 4 KS58006 TONE/PULSE DIALER WITH REDIAL TIMING DIAGRAM (for Switching Mode Operation by MDS Input) HS D KEY INPUT 2 3 P Switching MS = V S S * 2 1 8 DP tT D TONE OUT t TIDP X'MUTE tPA MDS tPA : 3.5 sec Fig. 5 |
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