SN761677

SLES066A – DECEMBER 2002

TV/VCR TUNER IC WITH DC/DC CONVERTER

FEATURES

30-V DC/DC Converter for Tuning Amplifier

Drivers

(31.25 kHz, 50 kHz, or 62 kHz)

DESCRIPTION

The SN761677 is a single-chip synthesized tuner IC

designed for TV/VCR tuning systems. The circuit consists

of a PLL synthesizer, 3-band local oscillators and mixer,

30-V dc/dc converter for tuning the amplifier, four NPN

emitter follower band drivers, four NPN open collector

ports, and is available in a small package outline. The

15-bit programmable counter and reference divider are

selectable by the reference divider ratio for a 4-MHz Xtal

oscillator.

BS4

P5

BS1

SDA

BS2

MIX OUT1

MIX OUT2

VHF RF IN1

UHF RF IN2

VHF RF IN2

BS3

ADC/TEST

VTU

VCC

RF GND

VHI OSC B

VLO OSC B

OSC GND

VHI OSC C

UHF OSC B1

UHF OSC C1

UHF OSC C2

UHF OSC B2

IF GND

IF OUT1

IF OUT2

CP

AS

TUVCC(5V)

P6

VLO OSC C

UHF RF IN1

15

13

4

1

3

5

6

7

8

9

10

11

12

14

16

2

24

26

35

38

36

34

33

32

31

30

29

28

27

25

23

37

P8

P7

XTAL

18

19

21

20

SCL

TUGND

17

22

DA PACKAGE (TOP VIEW)

38-PIN TSSOP (DA)

VDC(DC/DCout)

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Copyright

 2002, Texas Instruments Incorporated