NTE1693 Integrated Circuit Telephone Pulse Dialer (CMOS) Description: The NTE1693 is a CMOS LSI pulse dialer in a 16–Lead DIP type package with redial which integrates a ceramic resonator as a frequency reference. Features: D Make Ratio: 33/39% Pin–Selectable. D Pulse Output: “1” True D Mute Output: “0” True D 17–Digit Redial with either * or # Input D Uses a Ceramic Oscillator as a Frequency Reference D Direct Telephone Line Operation D Uses either a Standard 2–of–7 Matrix Keyboard or a Single Contact Keyboard D Mute Signal Generated on Pulse Signal Absolute Maximum Ratings: Supply Voltage (Note 1), VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +6.2V Maximum Pin Voltage VIN1 (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V VIN2 (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V Maximum Power Dissipation (TA = +25°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +60°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C Note 1. Referenced to GND Note 2. The maximum applicable voltage or any pin with respect to GND Note 3. The maximum applicable voltage on any pin with respect to VDD Recommended Operating Conditions: Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 to 6.0V DC Electrical Characteristics: (TA = –30° to +60°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Key Contact Resistance RKI – – 1 kΩ Keyboard Capacitance CKI – – 30 pF Input Voltage K1H 0.8VDD – VDD V GND – 0.2VDD V – 4 – kΩ – 100 – kΩ Key Pull–Up Resistance KIRU Key Pull–Down Resistance KIRD 2–of–7 input mode, Note 4 VDD = 6.0V, VIN = 4.8V MUTE Sink Current IM VDD = 2.5V, VOUT = 0.5V, Note 5 500 – – µA Pulse Output Sink Current IP VDD = 2.5V, VOUT = 0.5V, Note 6 1.0 – – mA ISUPPLY = 150µA, Note 7 1.5 2.5 3.5 V VDD–VRFF Value VREF Memory Retention Current IMR All outputs in no–load state – 0.7 – µA Operating Current IOP All outputs in no–load state – 100 150 µA MUTE, PULSE Leakage ILKG VDD = 6.0V, VOUT = 6.0V, Note 5, Note 6 – 0.001 1 µA Note Note Note Note 4. 5. 6. 7. Applies to key input pins (ROW1–ROW4 COL1–COL3) Applies to MUTE output pin. Applies to PULSE output pin Applies to VREF pin. AC Electrical Characteristics: Parameter Oscillator Frequency Symbol fOSC Test Conditions Note 8 Min Typ Max Unit – 480 – kHz Keyboard Debounce Time tDB – 10 – ms Time for Valid Key Entry tKD 40 – – ms Oscillator Start–Up Time tON – 6 – ms Pulse Rate PR – 10 – pps Break Time tB Pin9 tied to V+ – 61 – ms Pin9 tied to V– – 67 – ms – 800 – ms Inter–Digital Pause tIDP Note 9 Note 8. Typical values are exact with a nominal 480kHz frequency reference (except for oscillator start–up time) Note 9. Ceramic resonator should have the following equivalent values: R < 20Ω, RA ≥ 70kΩ, CO ≤ 500pF. Pin Connection Diagram VCC 1 16 Pulse Output Vref 2 Column 1 3 15 On–Hook/Test 14 Row 1 Column 2 4 13 Row 2 Column 3 5 12 Row 3 GND 6 11 Row 4 OSC Input 7 10 Mute Output OSC Output 8 16 9 Make/Break Select 9 .260 (6.6) Max 1 8 .785 (19.9) Max .300 (7.62) .200 (5.08) Max .245 (6.22) Min .100 (2.54) .700 (17.7)