SN761677 Datasheet | TV/VCR TUNER IC





(Datasheet) SN761677 Datasheet PDF Download

Part Number SN761677
Description TV/VCR TUNER IC
Manufacture etcTI
Total Page 22 Pages
PDF Download Download SN761677 Datasheet PDF

Features: www.ti.com SN761677 SLES066A – DECEMB ER 2002 TV/VCR TUNER IC WITH DC/DC CONV ERTER FEATURES D Single Chip Mixer/Osc illator, Synthesizer, and 30-V DC/DC Co nverter for Tuning Amplifier D VHF-L, V HF-H, UHF 3-Band Local Oscillator D I2C Bus Protocol D Four Data Bytes Transmi ssion D Low Noise DC/DC Converter D 4ch NPN Emitter Follower Type Band Switch Drivers D 4ch NPN Open Collector Type P orts D Programmable Reference Divider R atio (31.25 kHz, 50 kHz, or 62 kHz) D 5 -V Power Supply D 38-Pin TSSOP Package DESCRIPTION The SN761677 is a single-ch ip synthesized tuner IC designed for TV /VCR tuning systems. The circuit consis ts of a PLL synthesizer, 3-band local o scillators and mixer, 30-V dc/dc conver ter 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 div ider are controlled by I2C bus control. Tuning step frequency is selectable by the reference divider rat.

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www.ti.com
SN761677
SLES066A – DECEMBER 2002
TV/VCR TUNER IC WITH DC/DC CONVERTER
FEATURES
D Single Chip Mixer/Oscillator, Synthesizer, and
30-V DC/DC Converter for Tuning Amplifier
D VHF-L, VHF-H, UHF 3-Band Local Oscillator
D I2C Bus Protocol
D Four Data Bytes Transmission
D Low Noise DC/DC Converter
D 4ch NPN Emitter Follower Type Band Switch
Drivers
D 4ch NPN Open Collector Type Ports
D Programmable Reference Divider Ratio
(31.25 kHz, 50 kHz, or 62 kHz)
D 5-V Power Supply
D 38-Pin TSSOP Package
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
controlled by I2C bus control. Tuning step frequency is
selectable by the reference divider ratio for a 4-MHz Xtal
oscillator.
DA PACKAGE (TOP VIEW)
38-PIN TSSOP (DA)
VLO OSC B
VLO OSC C
OSC GND
VHI OSC B
VHI OSC C
UHF OSC B1
UHF OSC C1
UHF OSC C2
UHF OSC B2
IF GND
IF OUT1
IF OUT2
VCC
CP
VTU
TUVCC(5V)
TUGND
VDC(DC/DCout)
XTAL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
38 UHF RF IN2
37 UHF RF IN1
36 VHF RF IN2
35 VHF RF IN1
34 RF GND
33 MIX OUT2
32 MIX OUT1
31 BS1
30 BS2
29 BS3
28 BS4
27 P5
26 ADC/TEST
25 P6
24 AS
23 SDA
22 SCL
21 P7
20 P8
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.
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.
Copyright 2002, Texas Instruments Incorporated

                    
                    






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