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Part: BA7625
Category:
Multimedia
Description:
Company: ROHM Electronics
Datasheet: Download BA7625 datasheet File size : 97 kB
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Datasheet text preview:
Multimedia ICs
Video signal switcher for AV amplifiers
BA7625
The BA7625 is a video signal switch that contains two five-channel analog multiplexers and wide-band 6dB amplifiers.It designed for use in video cassette recorders. By simply adding transistor buffers to the outputs,it is possible to construct arecord / playback switch for two record / playback VCRs, and three video playback machines (eg.laser disk players). Input switching and VCR record switching can be done independently. The BA7625 has sync-tip clamp inputs which are ideal for switching video signals. A plication ·V pamplifierssand video selectors A
·)F5e-anturuets/ 3-output switches. 1 ip
2) Sync-tip clamp inputs.
3) Built-in 6dB amplifiers. 4) 5V supply voltage.
·Absolute maximum ratings (Ta = 25°C)
Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 9 500 25 ~ + 70 55 ~ + 125 Unit V mW °C °C
Reduced by 5mW for each increase in Ta of 1°C over 25°C.
1
Multimedia ICs
BA7625
·Block diagram
Monitor OUT GND IN5 GND IN4 CTL E IN3 CTL D 1 2 3 4 5 6 7 logic 6dB logic 16 15 14 13 12 11 10 9 IN1 CTL A VOUT1 VCC IN2 CTL B VOUT 2 CTL C
6dB
8
·Truth table
A L H L H H B L L H H H E Monitor OUT IN1 IN2 IN3 IN4 IN5 C L H L H H D L L H H H E V OUT1 -- IN2 IN3 IN4 IN5 C L H L H H D L L H H H E V OUT2 IN1 -- IN3 IN4 IN5
L H
L H
L H
Note 1: indicates "don't care" (H or L).
2
Multimedia ICs
BA7625
·Equivalent input / output circuits
Input circuit Waveform
IN1 ~ IN5
Vcc R1 R2 200 Q1
IN
200
1VP-P
Q2 Q3 +
V
DC 2.0V
V1 2.7V
I1 100µA
CTLA ~ CTLE
IN
Vcc R1 2k R2 R3 58k O1 Q1 R4 38k 58k Q2
Vcc = 5.0V High level 3.3V
Low level 2.1V
Monitor OUT
Vcc Q1 R1 R2 17k 100 Q4 MONOUT Q2 Q3 Q5 1.4mA DC 0.5V 2VP-P
VOUT1 , VOUT2
Vcc I1 R1 Q1 R2 100 Q3 O1 DN I2 6 0 0 µA 1.4mA Q2 Q4 DC 0.5V VOUT 2VP-P 25BUR 4 8 k VOUT1
3
Multimedia ICs
BA7625
·Electrical characteristics (unless otherwise noted, Ta = 25°C and VCC = 5V)
Parameter Operating voltage Supply current Maximum output level Voltage gain Interchannel crosstalk Mute level Frequency characteristic CTL pin switch level
Not designed for radiation resistance.
Symbol VCC ICC Vom GV CT CTM Gf VTH
Min. 4.5 -- 2.6 5.7 -- -- 3 2.2
Typ. 5.0 15.0 2.9 6.2 65 35 0 --
Max. 5.5 20.0 -- 6.7 45 25 3 3.3
Unit V mA VP-P dB dB dB dB V
Conditions -- -- f = 1kHz, THD = 0.5% f = MHz, VIN = 1VP-P f = 4.43MHz, VIN = 1VP-P f = 4.43MHz, VIN = 1VP-P 10MHz / 1MHz, VIN = 1VP-P --
·Measurement circuit
VCC VCC 75 V 105 1 SW1 103 4.7µ V VCC A 16 15 14 13 12 11 10 9 12 3 SWC VO U T 1 V VO U T 2 V 23 12 SWA 3 1 SW2 V 75 V 105 23 12 SWB VC C 3 105 105 V logic
6dB
logic
6dB
SW D 12 1 MONITOR OUT V SW5 SW4 SW3 2 3 4 5 6 7 8
V
3
VC C
105
105
1
2
3 105
1
2
3 105
1
2
3 105 105 12 V
S WE 3
75 V
75 V
75 V
VCC
Fig.1
4
Multimedia ICs
BA7625
·Measurement conditions
Parameter Current dissipation Monitor OUT maximum output level Symbol ICC Vom 1MON Vom 2MON Vom 3MON Vom 4MON Vom 5MON GV 1MON GV 2MON GV 3MON GV 4MON GV 5MON CT1-2MON CT1-3MON CT1-4MON CT1-5MON CT2-1MON CT2-3MON CT2-4MON CT2-5MON Monitor OUT interchannel crosstalk CT3-1MON CT3-2MON CT3-4MON CT3-5MON CT4-1MON CT4-2MON CT4-3MON CT4-5MON CT5-1MON CT5-2MON CT5-3MON CT5-4MON Monitor OUT frequency characteristic Gf 1MON Gf 2MON Gf 3MON Gf 4MON Gf 5MON Vom 2OUT1 Vom 3OUT1 Vom 4OUT1 Vom 5OUT1 Switch settings SW1 3 2 3 2 3 2 3 3 3 3 2 3 3 SW2 3 3 2 3 3 2 3 3 2 3 3 3 3 2 3 2 3 SW3 3 3 2 3 3 2 3 3 3 2 3 3 3 2 3 3 2 3 SW4 3 3 2 3 3 2 3 3 3 3 2 3 3 2 3 3 2 3 SW5 3 3 2 3 2 3 3 3 3 2 3 2 3 3 2 SWA 2 3 2 3 2 2 3 2 3 2 2 2 3 2 2 3 3 2 2 3 2 2 2 3 2 2 2 3 2 2 2 3 2 3 2 2 SWB 2 3 3 2 2 2 3 3 2 2 2 3 2 2 2 3 2 2 2 3 3 2 2 3 3 2 2 3 3 2 2 3 3 2 2 2 SWC 2 SWD 2 SWE 2 Measurement method --
2 3 2 2
3 2 2 2
3 2 3 2 3 2 3 2 3 2 3 2 3 2 3 2 Note 1
Note 2
Monitor OUT voltage gain
Note 3
Note 4
VOUT1 maximum output level
Note 1
5
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