BA7657F ROHM Electronics, BA7657F Datasheet

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BA7657F

Manufacturer Part Number
BA7657F
Description
Manufacturer
ROHM Electronics
Datasheet

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Part Number:
BA7657F
Manufacturer:
ROHM/罗姆
Quantity:
20 000
Part Number:
BA7657F 506 701K
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ROHM
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Part Number:
BA7657F-E2
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ROHM/罗姆
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Part Number:
BA7657F-EZ (SOP24)
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ROHM
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8 890
The BA7657F and BA7657S are for high definition displays, and have internal switches for switching between broad-
band RGB signals and HD / VD signals, as well as an internal synchronization separator. These ICs simplify the de-
signing of input units for deluxe displays.
CRT display, HDTV, video board for personal computer, etc.
1) Operates on a single 5V power supply.
2) Internal broadband RGB switch (frequency charac-
Applications
Features
Absolute maximum ratings (Ta = 25°C)
Power supply voltage
Power
dissipation
Operating temperature
Storage temperature
Recommended operating conditions (Ta = 25°C)
Power supply voltage
Reduced by 5.5mW (BA7657F) or 12mW (BA7657S) for each increase in Ta of 1 C over 25 C.
Input selector switch for high
definition displays
BA7657F / BA7657S
Multimedia ICs
teristics: 230MHz, – 3dB).
Parameter
Parameter
BA7657S
BA7657F
Symbol
V
CC
Symbol
Topr
Tstg
V
Pd
CC
Min.
4.5
– 25 ~ + 75
– 55 ~ + 125
Typ.
5.0
Limits
1200
550
8.0
Max.
5.5
3) Internal HD / VD switch.
4) Internal synchronization separator for synchronizing
signals superimposed onto G signals.
Unit
Unit
mW
V
V
C
C
1

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BA7657F Summary of contents

Page 1

... V BA7657F Power dissipation BA7657S Operating temperature Topr Storage temperature Tstg Reduced by 5.5mW (BA7657F) or 12mW (BA7657S) for each increase over 25 C. • Recommended operating conditions (Ta = 25°C) Parameter Symbol Power supply voltage Internal switch. 4) Internal synchronization separator for synchronizing signals superimposed onto G signals ...

Page 2

... HD 1 input input 22 HD output 1 21 Red output DET 1 19 Green output 2 18 Composite video input (Sync on Green) Syncsepa 17 Composite sync output Logic 16 CTL (H: IN1, L: IN2 Blue output output input BA7657F / BA7657S CC ...

Page 3

... VD IN1 IN1 IN2 IN2 output 15, 19, 21pin 5mA 400 BA7657F / BA7657S Pin name Function VD output Vertical synchronization signal VD output Blue output Color signal B output Control Control (high = IN1, low = IN2) Composite sync Synchronization signal output output Composite video Composite signal input ...

Page 4

... V CC 2.0k 100 15k 14, 22pin 1.2k 660 HD sync signal detector from HD out to sync sepa 2pin 4 Control 1k 16pin 50k Composite Video input V CC 25k 25k 100 18pin 25k 25k BA7657F / BA7657S Composite Sync output V CC from DET out 17pin 35k 15k V CC ...

Page 5

... V — — 1 100 130 A – 3 – 1 — A BA7657F / BA7657S = 5.0V) Conditions Measurement circuit f = 1kHz f = 1MHz P 1MHz P 1MHz P 10MHz P 10MHz P 5. ...

Page 6

... BA7657F / BA7657S = 5.0V) CC Conditions Measurement circuit = 1V Fig Fig Fig Fig Fig.2 IN P-P 1 Fig 20kHz Fig ...

Page 7

... SW3 SW4 SW5 SW6 Fig. 1 BA7657F / BA7657S 1.2V 5 1.8V 4 OSC5 SW17 SW16 Oscilloscope 2 3 SW15 OSC3 2 0. ...

Page 8

... BA7657F / BA7657S 14 Other Other ...

Page 9

... Output voltage, "H" level 2 Output voltage, "L" level 2 Output current, "L" level 3 Rise time 4 Fall time 4 Rise delay time 4 Fall delay time 4 Switch condition 13 Other BA7657F / BA7657S 9 ...

Page 10

... Measurement circuit for frequency characteristics and crosstalk characteristics 50 50 C1: 0. Fig. 2 BA7657F / BA7657S Network Analyzer 240 0. 240 19 Network Analyzer 1. 1.2V 2 240 15 Network Analyzer ...

Page 11

... Set the switch to 1 and measure the R output. CTB2R = 20log (V Similarly, CTB2G = 20log (V CTB2B = 20log ( P-P Relationship between inputs and outputs Input HD VD Sync on Green — — — — — — BA7657F / BA7657S / V ) [dB] OUT IN = 1. G1) [dB] OUT B1) [dB] OUT R1) [dB] OUT ...

Page 12

... IN2 Fig. 3 BA7657F / BA7657S DET + 0. 6. 68k Syncsepa 2k 17 Composite Sync OUT Logic OUT Red OUT ...

Page 13

... FREQUENCY: f (Hz) Fig. 5 Interchannel crosstalk characteristics (Ro) so that the frequency characteristics remain flat. A too-large resistance will suppress the characteristic peak. BA7657S 0.3Min. 0.15 BA7657F / BA7657S 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 100M 300M 100 120 140 160 180 200 FREQUENCY: fH (kHz) Fig ...

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