MC3371 Motorola, MC3371 Datasheet
MC3371
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MC3371 Summary of contents
Page 1
... MC3371/MC3372 are similar to the MC3361/MC3357 FM IFs, except that a signal strength indicator replaces the scan function controlling driver which is in the MC3361/MC3357. The MC3371 is designed for the use of parallel LC components, while the MC3372 is designed for use with either a 455 kHz ceramic discriminator, or parallel LC components. ...
Page 2
... Meter Drive –100 to –40 dBm Meter Drive Dynamic Range (455 kHz) Mixer Third Order Input Intercept Point f1 = 58.125 MHz f2 = 58.1375 MHz Mixer Input Resistance Mixer Input Capacitance 2 MC3371 MC3372 Symbol Value Unit V CC 2.0 to 9.0 Vdc 2 0.0005 to 10 mVrms f rf ...
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... Squelch Off 2.0 Vdc Squelch On Vdc Squelch Off 2.0 to 9.0 V Detector Output (No Input Signal) DC Voltage Filter Output (No Input Signal) DC Voltage Voltage Change 2.0 to 9.0 V Trigger Hysteresis Figure 1. MC3371 Functional Block Diagram and Test Fixture Schematic RF Input 4.0 Vdc 0.01 51 Mute 16 ...
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... Figure 2. MC3372 Functional Block Diagram and Test Fixture Schematic RF Input 4.0 Vdc 0.01 Mute Squelch Trigger with Hysteresis Mixer Oscillator 0.33 57.6575 MHz 0.001 4 MC3371 MC3372 RSSI Output Filter In 0.1 Filter Out 1 1.0 F 470 510 – Filter Amp + Demodulator Limiter Amp ...
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... MHz 9 –40 dBm 6.0 1.8 k Load 3 1.0 2.0 3.0 4.0 5.0 6.0 7 SUPPLY VOLTAGE (V) MOTOROLA ANALOG IC DEVICE DATA MC3371 MC3372 TYPICAL CURVES (Unmatched Input) Figure 4. RSSI versus RF Input 105 125 –140 –120 –100 Figure 6. Mixer Output versus RF Input 0 – ...
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... OPERATING CONDITIONS 4.0 Vdc 100 V, f mod = 1.0 kHz, f dev = 3.0 kHz. MC3371 10.7 MHz (see Figure 11). Internal Equivalent Circuit Pin Symbol 1 OSC1 OSC1 OSC2 OSC2 200 Out 1 100 1 DEC1 ...
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... MC3371 PIN FUNCTION DESCRIPTION (continued) OPERATING CONDITIONS 4.0 Vdc 100 V, f mod = 1.0 kHz, f dev = 3.0 kHz. MC3371 10.7 MHz (see Figure 11). Internal Equivalent Circuit Pin Symbol 200 9 100 A 10 Fil In 10 Filter Fil Out V CC 240 A ...
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... MC3371 PIN FUNCTION DESCRIPTION (continued) OPERATING CONDITIONS 4.0 Vdc 100 V, f mod = 1.0 kHz, f dev = 3.0 kHz. MC3371 10.7 MHz (see Figure 11). Internal Equivalent Circuit Pin Symbol 13 RSSI V CC 1.8 k Bias 13 RSSI Out 14 MUTE Gnd Gnd 15 16 MIX Mixer In 3 ...
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... 200 9 RA Out RA Out 100 A MOTOROLA ANALOG IC DEVICE DATA MC3371 MC3372 MC3372 PIN FUNCTION DESCRIPTION Description IF Amplifier Input Decoupling. External 0.1 F capacitors connected Amplifier Output Signal level is typically 300 mVpp. Quadrature Detector Input. Signal level is typically 150 mVpp. ...
Page 10
... OSC1 2 X OSC2 X Y 200 DEC 7 IF Out 10 MC3371 MC3372 Figure 9. MC3371 Circuit Schematic Mixer Out Meter Out Filter 100 Bias Figure 10. MC3372 Circuit Schematic Mixer Out Meter Out Filter ...
Page 11
... Pins 5 and 7, respectively (see Figures 12 and 13). In the MC3371, a parallel LCR quadrature tank circuit is connected externally from Pin (similar to the MC3361). In the MC3372, a quadrature capacitor is needed externally from Pin 7 to Pin 8 and a parallel ceramic discriminator with a damping resistor is also needed from Pin (similar to the MC3357) ...
Page 12
... Pin 14 to the appropriate point in the audio path between Pin 9 and an audio amplifier. The voltage at Pin 14 should not be lower than –0.7 V; this can be assured by connecting Pin 14 to the point that has no dc component. Figure 11. Typical Application for MC3371 at 10.7 MHz 4.0 Vdc 1st IF 10.7 MHz from Input ...
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... IF 10.7 MHz from Input + Front End C9 10 C16 91 8.2 H R13 L2 560 C1 0. Squelch Trigger with Hysteresis Oscillator 1 2 C10 68 10.245 MHz MOTOROLA ANALOG IC DEVICE DATA MC3371 MC3372 RSSI Output 4.7 1 1N5817 R5 TKANS9443HM 6 4 560 0 0.001 ...
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... L2 Coilcraft 0.84 H 143–13J12 R13 44.545 MHz 1.0 k Figure 14. RSSI Output versus RF Input 3.5 3.0 2.5 2.0 1 10.7 MHz 4.0 Vdc 1.0 Reference Figure 11 0.5 0 –120 –100 –80 –60 14 MC3371 MC3372 RSSI Output 100 4.7 1 1N5817 R5 VR1 (Squelch Control 4 560 0.1 C6 0.001 R7 R8 ...
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... Reference Figures 11, 12 and 13 Figure 17. Mixer Input Impedance versus Frequency +j25 4.0 Vdc +j10 RF Input = –40 dBm 10 0 –j10 –j25 MOTOROLA ANALOG IC DEVICE DATA MC3371 MC3372 Figure 16 AMR versus Input 10.7 MHz 4 30 –110 –90 –70 – ...
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... Figure 18. MC3371 PC Board Component View with Matched Input at 10.7 MHz COMPONENT SIDE AF OUT BNC MC3371 IF 10.7 MHZ FRONT END Figure 19. MC3371 PC Board Circuit or Solder Side as Viewed through Component Side SOLDER SIDE Above PC Board is laid out for the circuit in Figure 11. 16 MC3371 MC3372 V CC GND ...
Page 17
... COMPONENT SIDE AF OUT BNC MC3372 IF 10.7 MHZ FRONT END Figure 21. MC3372P PC Board Circuit or Solder Side as Viewed through Component Side SOLDER SIDE Above PC Board is laid out for the circuit in Figure 12. MOTOROLA ANALOG IC DEVICE DATA MC3371 MC3372 VCC GND CUT CUT .325 .325 + C9 R10 ...
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... G K –T– SEATING PLANE 0.25 (0.010 MC3371 MC3372 OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 648–08 ISSUE SEATING –T– PLANE SUFFIX PLASTIC PACKAGE CASE 751B–05 (SO– ...
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... L PIN 1 IDENT. 1 0.15 (0.006 –V– C 0.10 (0.004) –T– SEATING D PLANE MOTOROLA ANALOG IC DEVICE DATA MC3371 MC3372 OUTLINE DIMENSIONS DTB SUFFIX PLASTIC PACKAGE CASE 948F–01 (TSSOP–16) ISSUE É É É Ç Ç Ç ...
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... US & Canada ONLY 1–800–774–1848 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 INTERNET: http://motorola.com/sps 20 MC3371 MC3372 are registered trademarks of Motorola, Inc. Motorola, Inc Equal JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4–32–1, Nishi–Gotanda, Shinagawa–ku, Tokyo 141, Japan. 81–3–5487–8488 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd. ...