Document
Multimedia ICs
Video signal switcher
BA7612N / BA7612F
The BA7612N and BA7613F are three-channel analog multiplexers with built-in mute, 6dB amplifier and 75Ω driver. The ICs designed for use in video cassette recorders, and feature a large dynamic range and wide operating frequency range. All inputs are terminated with 20kΩ (Typ.) input impedance. Applications • Video cassette recorders and televisions
Features • 1) 3-input / 1-output switches. 2) 3) 4) 5) Built-in 6dB amplifier and 75Ω driver. Built-in mute. Large input impedance (20kΩ Typ.). Wide operating supply voltage range (4.5V ~ 13.0V BA7612N) (4.5V ~ 9.5V BA7613F).
6) Low power dissipation (103mW Typ.). 7) Excellent frequency characteristics (10MHz, 0dB Typ.). 8) Wide dynamic range (3.5VP-P Typ.). 9) Low interchannel crosstalk ( – 65dB Typ., f = 4.43MHz).
•Block diagram
BA7612N
MUTE 6dB Amp 75Ω Driver
CTLA 2
BA7612F
IN1 1
MUTE 6dB 75Ω
8 VOUT
7 VCC
LOGIC
CTLB 3
LOGIC
6 IN3
IN2
4
5 GND
1 IN1
2 CTLA
3 CTLB
4 IN2
5 GND
6 IN3
7 VCC
8 VOUT
•Truth table
CTL A L (OPEN) L (OPEN) H H CTL B L (OPEN) H L (OPEN) H OUT IN1 IN2 IN3 MUTE
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Multimedia ICs
BA7612N / BA7612F
•Absolute maximum ratings (Ta = 25°C)
Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits
∗113.5 / ∗210.0 ∗1900∗3 / ∗2550∗4
Unit V mW °C °C
– 25 ~ + 75 – 55 ~ + 125
∗1 BA7612N ∗2 BA7612F ∗3 Reduced by 9mW for each increase in Ta of 1°C over 25°C. ∗4 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
•Electrical characteristics (unless otherwise noted, Ta = 25°C and V
Parameter Operating voltage range Supply current Maximum output level Voltage gain Interchannel crosstalk Frequency characteristic Input impedance CTL pin switching level A CTL pin switching level B
᭺Not designed for radiation resistance.
CC
= 5V)
Conditions BA7612F is Max.9.5V
Symbol VCC ICC Vom GV CT Cf ZIN VTH-A VTH-B
Min. 4.5 — 3.0 5.5 — – 3.0 14 1.0 1.0
Typ. — 20.5 3.5 6.0 – 65 0 20 2.0 2.0
Max. 13.0 29.0 — 6.5 — 1.0 26 3.0 3.0
Unit V mA VP-P dB dB dB kΩ V V
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
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Multimedia ICs
BA7612N / BA7612F
•Measurement circuit
MUTE 6dB Amp 75 Ω Driver 1000µ
+
43 75 V ~ PP
Logic
1
2
3
4
5
6
7
8
VCC A 47µF
+
0.022µF
SW1 1 2 1
SW2 2 1
SW3 2
1µF OSC OSC
1µF OSC
1µF
~
50Ω
1µF
~
SW4 SW5 1 2 3
50Ω
1µF
~
50Ω
1µF
1
2 3
VCC
VCC
Fig. 1
3
Multimedia ICs
BA7612N / BA7612F
•Measurement conditions
Parameter Current dissipation Maximum output level Voltage gain IN1 IN2 IN3 IN1 IN2 IN3 IN1→IN2 IN1→IN3 IN1→MUTE IN2→IN3 IN2→MUTE IN3→MUTE IN1 IN2 IN3 CTLa CTLb Symbol SW1 ICC Vom Vom Vom GV GV GV CT CT CT CT CT CT Gf Gf Gf VTH VTH 2 1 2 2 1 2 2 1 1 1 2 2 2 1 2 2 2 2 2 2 1 2 2 1 2 2 2 2 1 1 2 2 1 2 2 1 Switch settings SW2 SW3 2 2 2 1 2 2 1 2 2 2 2 2 1 2 2 1 1 2 SW4 2 3 3 2 3 3 2 3 2 2 2 2 2 3 3 2 1 3 SW5 2 3 2 3 3 2 3 2 3 2 3 2 2 3 2 3 3 1 Measu.