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Part: BA7657F
Category:
Multimedia
Description:
Company: ROHM Electronics
Datasheet: Download BA7657F datasheet File size : 124 kB
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Datasheet text preview:
Multimedia ICs
Input selector switch for high definition displays
BA7657F / BA7657S
The BA7657F and BA7657S are for high definition displays, and have internal switches for switching between broadband RGB signals and HD / VD signals, as well as an internal synchronization separator. These ICs simplify the designing of input units for deluxe displays. Ap lication ·RTpdisplay,sHDTV, video board for personal computer, etc. C
eat s ·)FOpeurraetes on a single 5V power supply. 1 2) Internal broadband RGB switch (frequency characteristics: 230MHz, 3dB).
3) Internal HD / VD switch. 4) Internal synchronization separator for synchronizing signals superimposed onto G signals.
·Absolute maximum ratings (Ta = 25°C)
Parameter Power supply voltage Power dissipation BA7657F BA7657S Symbol VCC Pd Topr Tstg Limits 8.0 550 1200 25 ~ + 75 55 ~ + 125 Unit V mW °C °C
Operating temperature Storage temperature
Reduced by 5.5mW (BA7657F) or 12mW (BA7657S) for each increase in Ta of 1°C over 25°C.
·Recommended operating conditions (Ta = 25°C)
Parameter Power supply voltage Symbol VCC Min. 4.5 Typ. 5.0 Max. 5.5 Unit V
1
Multimedia ICs
BA7657F / BA7657S
·Block diagram
Red 1 input
1
24
HD 1 input
1
2
HD Sync signal detector
2
23
HD 2 input
Green 1 input
3
22
HD output
1
Ground
4
2
21
Red output
Blue 1 input
5
DET
20
VCC
1
Ground
6
2
19
Green output
Red 2 input
7 Syncsepa
18
Composite video input (Sync on Green)
Ground
8
17
Composite sync output
Green 2 input
9
1
Logic
16
CTL (H: IN1, L: IN2)
Ground
10
2
15
Blue output
1
Blue 2 input
11
2
14
VD output
VD 1 input
12
13
VD 2 input
2
Multimedia ICs
BA7657F / BA7657S
·Pin descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 Pin name Red 1 input Function Color signal R1 input Pin No. 14 15 16 17 18 19 20 21 22 23 24 Pin name VD output Blue output Control Composite sync output Function Vertical synchronization signal VD output Color signal B output Control (high = IN1, low = IN2) Synchronization signal output HD Sync signal Detecting phase of the synchronization detector signal detector circuit Green 1 input Ground Blue 1 input Ground Red 2 input Ground Green 2 input Ground Blue 2 input VD 1 input VD 2 input Color signal G1 input Ground Color signal B1 input Ground Color signal R2 input Ground Color signal G2 input Ground Color signal B2 input Vertical synchronization signal VD1 input Vertical synchronization signal VD2 input
Composite video Composite signal input input (Sync on Green) Green output V CC Red output HD output HD 2 input HD 1 input Color signal G output Power supply Color signal R output Horizontal synch. signal HD output Horizontal synch. signal HD2 input Horizontal synch. signal HD1 input
·Output selection setting table
CTL H L R IN1 IN2 G IN1 IN2 B IN1 IN2 HD IN1 IN2 VD IN1 IN2
·Input / output circuits
R. G. B input
VCC VCC 50 6.8k 1, 3, 5 7, 9, 11pin 100 21k 1k 5mA 15, 19, 21pin 12, 13 23, 24pin 1k VCC
R. G. B output
HD. VD input
35k
50k
15k
400
3
Multimedia ICs
BA7657F / BA7657S
HD. VD output
VCC
Control
VCC
2.0k
100
35k
1k 16pin 15k 14, 22pin 50k 1.2k 660 15k
HD sync signal detector
Composite Video input
Composite Sync output
VCC VCC from DET out
from HD out
to sync sepa
VCC
25k
25k
2pin 18pin 25k
100 25k 50µA
17pin
4
Multimedia ICs
BA7657F / BA7657S
·Electrical characteristics (unless otherwise noted, Ta = 25°C, VCC = 5.0V)
Parameter Quiescent current Analog switch unit Maximum output level Voltage gain Input pin voltage gain deviation Block voltage gain deviation Input pin crosstalk 1 Block crosstalk 1 Digital switch unit Input high level voltage Input low level voltage Input high level current Input low level current Rise time Fall time Rise delay time Fall delay time Output high level voltage Output low level voltage Output high level current Output low level current SYNC separation unit Minimum SYNC separation level Output high level voltage Output low level voltage Output low level current Rise time Fall time Rising delay time Fall delay time Control unit Output high level voltage Output low level voltage Output high level current Output low level current VIH VIL IIH IIL 1.8 -- 80 3 -- -- 100 1 -- 1.2 130 -- V V µA µA VIN = 5.0V VIN = 0V Fig.1 Fig.1 Fig.1 Fig.1 VSMin. VOH VOL IOL TR TF T RD T FD 50 4.5 -- 2 -- -- -- -- -- 5.0 0.2 -- 80 30 100 100 50 -- 0.5 -- 130 80 150 150 mVP-P V V mA ns ns ns ns Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 VIH VIL IIH IIL TR TF T RD TFD VOH VOL IOH IOL 1.8 -- 80 3 -- -- -- -- 3.0 -- 400 5 -- -- 100 1 30 30 50 30 3.7 0.2 -- -- -- 1.2 130 -- 50 50 80 50 -- 0.4 -- -- V V µA µA ns ns ns ns V V µA mA VIN = 5.0V VIN = 0V Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Fig.1 Vom GV GVI GVB CTI1 CTB1 2.8 1.0 0.2 0.2 -- -- -- 0.5 0 0 50 50 -- 0 0.2 0.2 40 40 VP-P dB dB dB dB dB f = 1kHz f = 1MHz, VIN = 1VP-P f = 1MHz, VIN = 1VP-P f = 1MHz, VIN = 1VP-P f = 10MHz, VIN = 1VP-P f = 10MHz, VIN = 1VP-P Fig.1 Fig.1 Fig.1 Fig.1 Fig.2 Fig.2 Symbol ICC Min. 20 Typ. 35 Max. 50 Unit mA Conditions Measurement circuit Fig.1
5
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