LA4168M Datasheet, PDF (1/6 Pages) Sanyo Semicon Device – Record/Playback System for Microcassette and Compact Cassette Recorders

Ordering number : EN5660
Monolithic Linear IC
LA4168M
Record/Playback System for Microcassette and
Compact Cassette Recorders
Overview
The LA4168M is a record/playback system IC for
microcassette and compact cassette recorders. The
LA4168M is an extremely high-functionality IC that
includes a motor control governor circuit, a voice sensor
circuit that detects sounds and turns motor on or off, a
power switch control circuit that receives an electrical
signal from a photosensor and turns all of the IC function
blocks on or off, and a circuit that increases the speed of
the motor during playback.
Functions
• Microphone and playback preamplifiers
• Record amplifier
• Power amplifier (BTL, 4 Ω)
• Automatic stop circuit (power switch)
• Governor circuit
• Motor speed and high-speed switching circuit
• Microphone power supply
• LED drive circuit
• Voice sensor circuit
Features
• Includes a voice switch that can turn the governor on or
off.
• Includes a power switch circuit that can turn all the IC
function blocks on or off from a photosensor signal.
During record, the IC can automatically turn the
governor on or off according to the microphone input
level, and furthermore, the governor on/off level can be
continuously adjusted from an external control knob.
(The control used for volume adjustment during
playback.)
• Continuously variable microphone monitor level.
• Includes a drive pin for an LED that lights only when
the governor is on in record mode.
Package Dimensions
unit: mm
3073A-MFP30SD
[LA4168M]
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Maximum supply voltage
Allowable power dissipation
Operating temperature
V_CC max
Pd max
Topr
Storage temperature
Tstg
Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Operating voltage range
(power block)
Load resistance
(preamplifier block)
Symbol
V_CC
V_CCop
R_Lpwr
R_Lpre
Conditions
Conditions
SANYO: MFP30SD
Ratings
Unit
4.5
V
800
mW
–10 to +50
°C
–55 to +150
°C
Ratings
Unit
3.0
V
1.8 to 3.6
V
4
Ω
10
kΩ
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
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