BA7649

Multimedia ICs Video signal switcher BA7649A / BA7649AF The BA7649A and BA7649AF are five-channel analog multiplexers (the IN5 pin can be used a mute input) designed for use in video cassette recorders. They feature large dynamic range, and wide operating frequency range, and have sync-tip inputs which are ideal for switching video signals. •Applications recorders and televisions Video cassette •Features/ 1-output switches. 1) 5-input 2) Built-in mute (the IN5 pin can be use a mute input). 3) Sync-tip clamp inputs. 4) Wide operating supply voltage range (4.5V to 13.0V). 5) Low power consumption (48mW Typ.). 6) Excellent frequency characteristics (10MHz, 0dB Typ.). 7) Wide dynamic range (3.5VP-P Typ.). 8) Low interchannel crosstalk ( – 65dB Typ., f = 4.43MHz). 9) DIP / SOP 14 pin package. •Absolute maximum ratings (Ta = 25°C) BA7649A Parameter Power supply voltage Allowable current Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 13.5 1100∗ – 25 ~ + 75 – 55 ~ + 125 Unit V mW °C °C ∗ Reduced by 11.0mW for each increase in Ta of 1°C over 25°C. BA7649AF Parameter Power supply voltage Allowable current Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 13.5 450∗ – 25 ~ + 75 – 55 ~ + 125 Unit V mW °C °C ∗ Reduced by 4.5mW for each increase in Ta of 1°C over 25°C when mounted on a 50mm × 50mm PCB board. 1 Multimedia ICs BA7649A / BA7649AF •Block diagram GND GND VOUT VCC IN5 IN4 IN3 14 13 12 11 10 9 8 •Truth table CTLA L (OPEN) L (OPEN) H H CTLB L (OPEN) H L (OPEN) H CTLC L (OPEN) L (OPEN) L (OPEN) L (OPEN) H OUT IN1 IN2 IN3 IN4 MUTE (IN5) Logic ∗ ∗ ∗ Either "L (open)" or "H". 5 CTL C 6 IN2 7 GND D1 1 IN1 2 GND 3 CTL A 4 CTL B •Equivalent circuits CLAMP INPUT IN Input clamp voltage 2.1V (VCC = 5V, Typ.) Input bias current 1µA [Typ.] Input impedance over 1MΩ D2 Vcc OUTPUT Vcc Q1 R2 100 Q2 Q1 D1 OUT Output impedance 20Ω [Typ.] Output DC voltage 0.55V (VCC = 5V, Typ.) 0.8µA 100µA 2mA D2 CTLA / CTLB Vcc R4 20k CTLC Vcc R4 30k R1 CTLA / B 100 R2 Q3 50k R3 34k D2 CTLC R1 100 R2 Q3 45k R3 29k D2 2 Multimedia ICs BA7649A / BA7649AF CC •Electrical characteristics (unless otherwise noted, Ta = 25°C and V Parameter Operating voltage Supply current Maximum output level Voltage gain Interchannel crosstalk Frequency characteristics CTL pin switching level A CTL pin switching level B CTL pin switching level C Symbol VCC ICC Vom GV CT Gf VTH-A VTH-B VTH-C Min. 4.5 — 3.0 – 0.5 — – 3.0 1.0 1.0 1.0 Typ. — 9.5 3.5 0 – 65 0 2.0 2.0 2.0 Max. 13.0 14.5 — 0.5 — 1.0 3.0 3.0 3.0 = 5V) Conditions — — f = 1kHz, THD = 0.5% f = 1MHz, VIN = 1.0VP-P f = 4.43MHz, VIN = 1.0VP-P f = 10MHz / 1MHz, VIN = 1.0VP-P — — — Unit V mA VP-P dB dB dB V V V Not designed for radiation resistance. •Measurement circuit 1µF 50Ω ~ 1µF 50Ω ~ 1µF 50Ω ~ OSC OSC 1µF 1µF OSC 1µF 2 SW5 1 SW4 2 1 SW3 2 1 VCC A + V 14 13 12 11 10 9 8 47µF 0.022µF Logic 1 2 3 4 5 6 7 SW1 1 2 1 SW2 2 1µF OSC OSC 1µF ~ 50Ω 1µF ~ 50Ω 1µF SW6 1 23 1 SW7 23 1 SW8 23 VCC VCC VCC Fig. 1 3 Multimedia ICs BA7649A / BA7649AF •Measurement conditions Parameter Current dissipation Maximum output level IN 1 IN 2 IN 3 IN 4 IN 5 IN 1 IN 2 IN 3 IN 4 IN 5 IN1→1N2 IN1→1N3 IN1→1N4 IN1→1N5 IN2→1N3 IN2→1N4 IN2→1N5 IN3→1N4 IN3→1N5 IN4→1N5 IN 1 IN 2 IN 3 IN 4 IN 5 CTLA CTLB CTLC Symbol ICC Vom Vom Vom Vom Vom GV GV GV GV GV CT CT CT CT CT CT CT CT CT CT Gf Gf Gf Gf Gf VTH VTH VTH Switch settings SW1 2 1 2 2 2 2 1 2 2 2 2 1 1 1 1 2 2 2 2 2 2 1 2 2 2 2 2 2 2 SW2 2 2 1 2 2 2 2 1 2 2 2 2 2 2 2 1 1 1 2 2 2 2 1 2 2 2 2 1 2 SW3 2 2 2 1 2 2 2 2 1 2 2 2 2 2 2 2 2 2 1 1 2 2 2 1 2 2 1 2 2 SW4 2 2 2 2 1 2 2 2 2 1 2 2 2 2 2 2 2 2 2 2 1 2 2 2 1 2 2 2 2 SW5 2 2 2 2 2 1 2 2 2 2 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 2 2 1 SW6 3 3 3 2 2 3 3 2 2 3 2 2 SW7 3 3 2 3 2 3 2 3 2 2 3 2 3 2 2 SW8 3 3 3 3 3 2 3 3 3 3 2 3 3 3 2 3 3 2 3 2 2 3 3 3 3 2 3 3 1 Measurement method Ammeter f = 1kHz, THD = 0.5% Note 1 ∗ ∗ Voltage gain ∗ ∗ f = 1MHz, VIN = 1VP-P Note 2 Interchannel crosstalk ∗ ∗ ∗ ∗ 3 3 2 2 1 3 2 2 2 ∗ ∗ ∗ ∗ 3 2 3 2 3 1 f = 4.43MHz, VIN = 1VP-P Note 3 Frequency characteristic ∗ ∗ ∗ ∗ f = 10MHz, f = 1MHz, VIN = 1VP-P Note 4 Note 5 CTL pin switching level ∗ Anywhere is possible. 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. •Electrical characteristic curves 10 9 OUTPUT VOLTAGE: VOUT (VP-P) VOLTAGE GAIN: Cf (dB) 8 7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 –4 100k 300k 1M 3M 10M 30M 100M VCC = 5V VCC = 12V VCC = 9V 2 CROSSTALK: CT (dB) 4 20 0 – 20 0 – 40 –2 – 60 – 80 100k 300k 1M 3M 10M 30M 100M INPUT VOLTAGE: VIN (VP-P) FREQUENCY: f (Hz) FREQUENCY: f (Hz) Fig. 2 VIN vs. VOUT (f = 1kHz) Fig. 3 Frequency characteristics Fig. 4 Interchannel crosstalk 4 Multimedia ICs BA7649A / BA7649AF •External dimensions (Units: mm) BA7469A 19.4 ± 0.3 6.5 ± 0.3 14 8 14 6.2 ± 0.3 4.4 ± 0.2 BA7649AF 8.7 ± 0.2 8 1 0.51Min. 4.25 ± 0.3 7 7.62 1.5 ± 0.1 1 7 3.2 ± 0.2 0.3 ± 0.1 0.11 1.27 0.4 ± 0.1 0.3Min. 0.15 2.54 0.5 ± 0.1 0° ~ 15° DIP14 SOP14 0.15 ± 0.1 5