BA7645N

Multimedia ICs Video signal switcher BA7645N The BA7645N is a four-channel analog multiplexer with mute, designed for use in video cassette recorders. It features a large dynamic range, and wide operating frequency range, and has sync-tip inputs which are ideal for switching video signals. Applications Video cassette recorders and televisions Features 1) 4-input / 1-output switches. 2) Built-in mute. 3) Sync-tip 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). Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limit 13.5 850∗ – 25 ~ + 75 – 55 ~ + 125 Unit V mW °C °C ∗ Reduced by 8.5mW for each increase in Ta of 1°C over 25°C. Block diagram MUTE Truth table CTLA L (OPEN) L (OPEN) H LOGIC CTLB L (OPEN) H L (OPEN) H CTLC L (OPEN) L (OPEN) L (OPEN) L (OPEN) H OUT IN1 IN2 IN3 IN4 MUTE H ∗ 1 2 3 4 5 6 7 8 9 10 ∗ ∗ Either "L (open)" or "H". CTLC CTLA CTLB IN2 IN3 IN4 IN1 GND VCC VOUT 1 Multimedia ICs BA7645N Equivalent circuits CLAMP INPUT Input bias current 1µA [Typ.]∗ Input clamp voltage 2.1V [VCC = 5V,Typ.]∗ ∗ Reference value IN D1 D2 Vcc OUTPUT Vcc Q1 R2 100 Q2 Q1 D1 OUT Output impedance 20Ω [Typ.]∗ Output DC voltage 0.55V [VCC = 5V, Typ.]∗ ...