Multimedia ICs Video signal switcher BA7604N The BA7604N is a switching IC developed for use in VCRs. It has two-channel analog multiplexers, and features wide dynamic range, and wide operating frequency range, and is suitable for switching audio and video signals. Applications •VCRs and TVs •1)Features Two 2-input / 1-output switches. 5) Wide dynamic range (3.0VP-P Typ.). 6) High input impedance (20kΩ Typ.). 7) Fast switching speed (50ns Typ.). 2) 5V power supply. 3) Low power consumption (42mW Typ.). 4) Excellent frequency characteristics (10MHz, 0dB, Typ.). •Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Symbol Limits Unit VCC 9 V mW Pd 500∗ Operating temperature Topr – 40 ~ + 85 °C Storage temperature Tstg – 55 ~ + 125 °C Power dissipation ∗ Reduced by 5.0mW for each increase in Ta of 1°C over 25°C. •Block diagram CTL Output L IN2 H IN1 6 7 8 9 10 CTLb IN2b GND IN1b 5 OUTb 4 OUTa VCC 3 CTLa 2 Sb IN2a 1 IN1a Sa Sa, Sb: Non-clamped 1 Multimedia ICs BA7604N •Equivalent circuits Sa, Sb IN VCC R3 13.6k R4 200 I2 0.3mA Q5 R12 200 R16 200 R7 100 Q9 R2 2.2k R6 20k Q4 R9 200 Q7 Q8 R15 200 Q10 Q11 Q3 R10 100 R11 100 R13 100 R14 100 Q2 Q12 Q1 OUT I1 0.6mA R5 33k R1 1k I4 0.6mA R17 12k I5 1mA CTL VCC R1 50k R6 25k R2 200 CTL I1 0.25mA 2 I2 0.6mA Q1 Q6 R3 400 Q3 Q5 Q2 Q4 R5 25k R4 400 I3 0.06mA Multimedia ICs BA7604N •Electrical characteristics (unless otherwise noted, Ta = 25°C and V Parameter Operating voltage CC = 5.0V) Symbol Min. Typ. Max. Unit Conditions VCC 4.5 5.0 5.5 V — Supply current ICC — 8.4 13.0 mA — Maximum output level Vom 2.7 3.0 — VP-P f = 1kHz, THD = 0.5% Voltage gain GV – 0.5 0 0.5 dB f = 1MHz, VIN = 1VP-P Interchannel crosstalk CT — – 65 — dB f = 4.43MHz, VIN = 1VP-P Frequency characteristic Gf –3 0 1 dB 10MHz / 1MHz, VIN = 1VP-P Total-harmonic distortion THD — 0.007 — % f = 1MHz, VIN = 1VP-P CTL pin switch level VTH 2.0 2.5 3.0 V — Input impedance ZIN 14 20 26 kΩ — Note: Refer to the measurement circuit given in Fig. 1. data •PinReference DC voltages (reference values) Units: Vdc Pin No. DC voltage Pin No. DC voltage 1 2.48 6 1.76 2 5.00 7 4.91 3 2.48 8 2.48 4 4.91 9 0 5 1.76 10 2.48 Electrical characteristics Parameter Min. Typ. Max. Unit Input impedance (no clamp) — 20k — Ω Output impedance — 30 — Ω The input coupling capacitor values should be 0.1µF to 1µF. 3 Multimedia ICs BA7604N •Measurement circuit 2 1 3 4 5 6 V V 7 8 9 1 2 3 1 2 OSC R 1 2 3 VIN2b VIN2a OSC 3 VCC R VCC S1b 1 2 3 105 3 S2b 105 2 S3b 105 105 VIN1a 1 105 3 S3a 105 2 105 1 S2a 105 223 A1 S1a VIN1b OSC OSC R R = 75Ω 4 10 47µ VCC R Multimedia ICs BA7604N •Measurement conditions Parameter Symbol Switch settings S1a S2a S3a S1b S2b S3b Measurement method ICC 2 2 2 2 2 2 Ammeter Maximum output level IN1a IN2a IN1b IN2b Vom Vom Vom Vom 3 2 2 2 2 3 2 2 2 3 2 2 2 2 3 2 2 2 2 3 2 2 2 3 Note 1 Voltage gain IN1a IN2a IN1b IN2b GV GV GV GV 3 2 2 2 2 3 2 2 2 3 2 2 2 2 3 2 2 2 2 3 2 2 2 3 Note 2 Interchannel crosstalk IN1a IN2a IN1b IN2b CT CT CT CT 2 3 2 2 3 2 2 2 2 3 2 2 2 2 2 3 2 2 3 2 2 2 2 3 Note 3 Frequency characteristic IN1a IN2a IN1b IN2b Gf Gf Gf Gf 3 2 2 2 2 3 2 2 2 3 2 2 2 2 3 2 2 2 2 3 2 2 2 3 Note 4 CTLa CTLb VTH VTH 3 2 2 2 1 2 2 3 2 2 2 1 Note 5 Totalharmonic distortion IN1a IN2a IN1b IN2b THD THD THD THD 3 2 2 2 2 3 2 2 2 3 2 2 2 2 3 2 2 2 2 3 2 2 2 3 Note 6 Input impedance IN1a IN2a IN1b IN2b ZIN ZIN ZIN ZIN 1 2 2 2 2 1 2 2 2 3 2 2 2 2 1 2 2 2 2 1 2 2 2 3 Note 7 Current dissipation CTL pin switching level Note 1: Connect a distortion meter to the output, and input a f = 1kHz sine wave. Adjust the output level until the output distortion is 0.5%. This output voltage at this time is the maximum output level Vom (VP-P). Note 2: Input a 1VP-P, 1MHz sine wave. The voltage gain is given by GV = 20 log (VOUT / VIN). Note 3: Input a 1VP-P, 4.43MHz sine wave. The interchannel crosstalk is given by CT = 20 log (VOUT / VIN). Note 4: Input 1VP-P, 1MHz and 10MHz sine waves. The frequency characteristic is given by Gf = 20 log (VOUT (f = 10MHz) / VOUT (f = 1MHz)). Note 5: Input a 1VP-P, 1MHz sine wave. Reduce the CTL pin voltage from VCC. The CTL pin switching level (VTH) is the CTL pin voltage at which the VOUT level drops below 20mVP-P. Note 6: Input a 1VP-P, 1kHz sine wave and measure the total-harmonic distortion of the output using a total-harmonic distortion meter. Note 7: Measure the input pin voltage VIN50 when a current of DC50µA is flowing into the input pin. Measure the input pin open-circuit voltage. The input impedance is given by Z = (VIN50 - VIN0) / 50 × 10-6[Ω]. 5 Multimedia ICs BA7604N •External dimensions (Units: mm) 2.8 ± 0.2 1.2 5.8 ± 0.2 1 3.5 ± 0.5 10.5 ± 0.5 25.2 ± 0.2 10 0.6 2.54 0.8 1.3 SIP10 6 0.3 ± 0.1