NTE1641 Integrated Circuit 1024 Stage BBD for Audio Signal Delays Description: The NTE1641 is a 1024–stage long delay low noise BBD that provides a signal delay of up to 51.2msec. This device is suitable for use as the reverberation effect of an electronic musical instrument, or in stereo equipment, due to its long delay times. Features: D Variable delay time of audio signal: 5.12ms to 51.2ms. D Clock component cancellation capability. D No insertion loss: Li = 0dB typ. D Wide dynamic range: S/N ≅ 80dB typ. D Wide frequency response: fi ≤ 12kHZ. D Low distortion: THD = 0.5% typ. (Vi = 0.78Vrms) D Clock frequency range: 10 to 100kHZ. D P channel silicon gate process. D 8–Lead DIP plastic package. Applications: D Reverberation effect echo for P.A. and stereo equipment. D Chorus effect in electronic musical instruments. D Variable or fixed delay of analog signals D Telephone time compression and delay line for voice communication systems, etc. Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Pin Voltage, VDD, VGG, VCP, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –18V to +0.3V Output Voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –18V to +0.3V Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +60°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +125°C Operating Conditions: (TA = +25°C unless otherwise specified) Parameter Symbol Condition Min Typ Max Unit Drain Supply Voltage VDD –14 –15 –16 V Gate Supply Voltage VGG – VDD+1 – V Clock Voltage “H” Level VCPH 0 – –1 V Clock Voltage “L” Level VCPL – VDD – V Clock Frequency fCP 10 – 100 kHZ Clock Pulse Width tW(CP)2 0.5T1 – Clock Rise Time tr(CP)2 – – 500 µs Clock Fall Time tf(CP)2 – – 500 ns Clock Input Capacitance CCP – – 700 V Clock Cross Point VX2 0 – –3 V Input DC Bias Voltage VBias –5 – –10 V Electrical Characteristics: (TA = +25°C, VDD = VCPL = –15V, VCPH = 0V, VGG = –14V, RL = 100kΩ) Parameter Symbol Condition Min Typ Max Unit 5.12 – 51.2 ms Signal Delay Time tD Input Singal Frequency fi fCP = 40kHz, Vi = 1.5Vrms, 3dB down (0dB at fi = 1kHZ) 12 – – kHZ Input Voltage Amplitude υi fCP = 40kHZ, fi = 1kHZ, THD = 2.5% 1.5 – – Vrms Insertion Loss Li fCP = 40kHZ, fi = 1kHZ, Vi = 1.5Vrms –4 0 4 dB Total Harmonic Distortion THD fCP = 40kHZ, fi = 1kHZ, Vi = 0.78Vrms – 0.5 2.5 % Output Noise Voltage Vno – – 0.3 mVrms Signal to noise ratio S/N fCP = 100kHZ, Weighted by “A” curve – 80 – dB Note 1. T = 1/fcp (Clock Period) Note 2. Clock pulse waveforms Pin Connection Diagram GND 1 8 Output 2 CP 1 2 7 Output 1 Input 3 6 CP 2 VGG 4 5 VDD 8 5 .256 (6.52) Max 1 4 .300 (7.62) .393 (10.0) Max .150 (3.81) .100 (2.54) .070 (1.77) Min .300 (7.62)