BH7775K datasheet, PDF - EEWORLD Datasheet

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BH7775K: DescriptionVCR audio signal processing system; CategoryOther integrated circuit (IC) Consumption circuit; File Size174KB，17 Pages; ManufacturerROHM Semiconductor; Websitehttps://www.rohm.com/; Environmental Compliance

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BH7775K Overview

VCR audio signal processing system

BH7775K Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	ROHM Semiconductor
Parts packaging code	QFP
package instruction	QFP, QFP64,.66SQ,32
Contacts	64
Reach Compliance Code	compli
Commercial integrated circuit types	CONSUMER CIRCUIT
JESD-30 code	S-PQFP-G64
JESD-609 code	e3/e2
length	14 mm
Number of terminals	64
Maximum operating temperature	70 °C
Minimum operating temperature	-10 °C
Package body material	PLASTIC/EPOXY
encapsulated code	QFP
Encapsulate equivalent code	QFP64,.66SQ,32
Package shape	SQUARE
Package form	FLATPACK
Peak Reflow Temperature (Celsius)	260
power supply	+-10 V
Certification status	Not Qualified
Maximum seat height	2.85 mm
Maximum slew rate	71.4 mA
Maximum supply voltage (Vsup)	5.39 V
Minimum supply voltage (Vsup)	4.69 V
surface mount	YES
technology	BIPOLAR
Temperature level	COMMERCIAL
Terminal surface	TIN/TIN COPPER
Terminal form	GULL WING
Terminal pitch	0.8 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	10
width	14 mm

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Video ICs

VCR audio signal processing system

BH7775K

The BH7775K is an audio signal processing system IC that includes a peak-noise reduction (PNR) processor, an FM

modulator / demodulator circuit, an input / output switcher, an automatic FM detector circuit, an FM band-pass filter,

a normal-audio circuit, a regulator circuit, and automatic adjusting circuits (VCO and BPF).

•

Applications recorders

VHS Video cassette

•

Features off dual ± power supply which allows a

1) Operates

large reduction in the number of coupling capacitors

required. A built-in regulator makes it easy to con-

struct a power supply system.

A built-in 2-wire serial control decoder circuit allows

serial control of the internal mode settings.

Automatic adjusting VCO and BPF circuits that use

the color signal subcarrier frequency (NTSC:

3.579545MHz and PAL: 4.433619MHz) ensure sta-

ble adjustment that is not effected by stress when

the chip is mounted, or variations over time.

4-input switcher (turner, BS, and line 1 and 2).

Output switch with built-in STEREO / LEFT / RIGHT

switching, Hi-Fi / MIX / NORMAL switching, and BS

monitor functions.

The PNR processor and FM modulation / demodula-

tion circuit provide reverse characteristics at record-

ing and playback. Also, carrier frequency adjustment

and FM de-emphasis / playback level adjustment

have been combined.

Built-in FM band-pass filter connects directly to the

playback amplifier and excels at attenuation of the

other channel. The FM recording output circuit has a

high-performance high-frequency cutoff filter that

produces a sine wave output.

Switching noise is reduced by a slope-control type

differential compensation circuit.

Built-in envelope detector circuit and noise-detecting

automatic FM detector circuit.

Built-in normal-audio signal processing circuit that

allows SP / LP / EP equalizer switching. Control ter-

minal provided for use with the BA7755AF high-volt-

age head switcher.

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