U4454B datasheet(3/7 Pages) TEMIC

Part #	U4454B

Description	Quasi-Split-Sound Processing and AM-Demodulator

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Manufacturer	TEMIC [TEMIC Semiconductors]

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U4454B

Preliminary Information

TELEFUNKEN Semiconductors

Rev. A1, 23-Feb-96

3 (7)

Electrical Characteristics

Vs = 8 V, Tamb = 25°C, reference point Pin 4, unless otherwise stated

Parameters

Test Conditions / Pins

Symbol

Min.

Typ.

Max.

Unit

DC-supply

Pin 14

Supply voltage

Vs

6.8

8.0

13.0

V

Supply current

Is

45

55

mA

IF-amplifier

Pins 1–16

Input sensitivity

RMS value

change of output signal at

Pin 6: –3 dB

Vin

80

120

µVRMS

Input impedance

Rin

1.2

k

W

Input capacitance

Cin

2

pF

IF-AGC

Pins 5 and 7

IF gain control range

Gv

60

66

dB

AGC capacitor

C5

4.7

µF

Average capacitor

C7

0.33

1.0

mF

PLL

Pins 8–9, 11 and 12

see note 2

PLL capture range

Dfcap

±1.5

MHz

VCO-tuning range

Dfvco

3.0

MHz

VCO-tuning sensitivity

Df / Du

3.0

4.5

kHz/mV

FM-mode: Intercarrier mixer operation

Pin 6

see note 3

DC output voltage

V5 = 4.5 V, vin = 0

VDC

4.2

V

Output resistance

Rout

100

W

Sound IF output voltage

5.50 MHz output voltage

5.74 MHz output voltage

Vin = 10 mV

Vout

80

35

120

55

180

80

mVRMS

Weighted signal to noise

ratio: (CCIR 468)

Black screen: 1. Channel

2. Channel

Grid pattern: 1. Channel

2. Channel

Grey screen 50%:

1. Channel

2. Channel

ref. signal: vin =10 mV,

fdev =

"30 kHz,

fmod = 1 kHz,

measured with FM demo-

dulator U2831B,

standard B/G modulated IF

signal

(residual carrier 10%);

S/N

62

60

52

50

59

58

dB

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