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BA7184S Datasheet(Fiches technique) 7 Page - Rohm

Numéro de pièce BA7184S
Description  4-channel PRE / REC amplifier with auto-tracking interface
Télécharger  8 Pages
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Fabricant  ROHM [Rohm]
Site Internet  http://www.rohm.com
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BA7184S Datasheet(HTML) 7 Page - Rohm

   
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Video ICs
BA7184S
Control system logic table
(1) DFF IN (pin 16)
• Playback input selection (head switching)
Control pin
EP / SP
L
H
H
L
L
H
DFF IN
Function
Selected playback input
Control voltage
VCTRL16 [V]
3.5 ~ VCC
0.0 ~ 1.2
Ch3 (PRE IN3 8pin)
Ch4 (PRE IN4 10pin)
Ch1 (PRE IN1 4pin)
Ch2 (PRE IN2 6pin)
(2) EP / SP control (pin 2)
• Recording output selection
• Playback input selection (see (1))
EP / SP
H
L
Function
Selected recording output
Control pin
Control voltage
VCTRL2 [V]
3.5 ~ VCC
0.0 ~ 1.2
EP (REC OUT 8, 9, 10pin)
SP (REC OUT 4, 5, 6pin)
(3) TP / PB / EE / REC CTRL (pin 12)
• Special playback / playback / recording mute / recording mode switching
Mode
PB / EE / REC
OT
ON
ON
ON
OFF
OFF
H
PB
ON
ON
OFF
OFF
OFF
M
OFF
OFF
OFF
ON
ON
L
REC
OFF
OFF
OFF
OFF
ON
• Pin 12 is biased internally in the IC. When open, PB mode is selected.
TRICK PLAY
REC MUTE
Control pin
Function
Control voltage
VCTRL12 [V]
4.1 ~ VCC
3.0 ~ 3.7
1.1 ~ 2.6
0.0 ~ 0.7
PRE AMP AT ENVE ENV COMP REC MUTE REC AMP
(4) H SYNC IN (pin 17)
• Special playback envelope comparator (ENVE COMP) output latch control.
• AGC operation control for recording.
2.8 ~ VCC
HON
L
OFF
0.0 ~ 1.2
ENVE COMP
Set at falling edge
H SYNC
Control voltage
VCTRL17 [V]
Control pin
Function
AGC detector
(5) ENVE COMP OUT (pin 15)
• Outputs playback envelope comparator data for special playback.
H
L
Ch1 or Ch2 > Ch3 or Ch4
ENVE COMP
Ch1 or Ch2 < Ch3 or Ch4
Function
Playback input level
Control pin


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