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Functional Block Diagram

UHF

OSC

VHF−H

OSC

VHF−L

OSC

OSCOUT2

VLO IN

VHI IN2

VHI IN1

UHF IN2

UHF IN1

IF

AMP

IFOUT2

GND

OSCOUT1

BAND SEL

IFOUT1

MIXOUT2

MIXOUT1

Pin Assignments

SN761685

TV TUNER IC

SLES175 – APRIL 2006

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with

appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

UHF IN1 and UHF IN2 (pins 20 and 21) withstand 1 kV, and all other pins withstand 2 kV, according to the human body model

(1.5 k

Ω, 100 pF).

Pin Description

TERMINAL

DESCRIPTION

SCHEMATIC

NAME

NO.

BAND SEL

13

Band selection input

Figure 1

GND

10, 22

Ground

IF OUT1

11

IF amplifier output 1

Figure 2

IF OUT2

12

IF amplifier output 2

Figure 2

MIXOUT1

24

Mixer output 1

Figure 3

MIXOUT2

23

Mixer output 2

Figure 3

OSCOUT1

15

Local oscillator output 1

Figure 4

OSCOUT2

14

Local oscillator output 2

Figure 4

UHF IN1

21

UHF mixer input 1

Figure 5

UHF IN2

20

UHF mixer input 2

Figure 5

UHF OSC 1

1

UHF oscillator 1

Figure 6

UHF OSC 2

3

UHF oscillator 2

Figure 6

UHF OSC 3

5

UHF oscillator 3

Figure 6

UHF OSC 4

7

UHF oscillator 4

Figure 6

VCC

16

VCC 5 V

VHI IN1

18

VHF HIGH mixer input 1

Figure 7

VHI IN2

17

VHF HIGH mixer input 2

Figure 7

VHI OSC 1

6

VHF HIGH oscillator 1

Figure 8

VHI OSC 2

8

VHF HIGH oscillator 2

Figure 8

VHI OSC 3

9

VHF HIGH oscillator 3

Figure 8

VLO IN

19

VHF LOW mixer input

Figure 9

2

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