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參數(shù)資料
| 型號： | 935263937118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 調(diào)諧器 |
| 英文描述： | 2-BAND, VIDEO TUNER, PDSO28 |
| 封裝： | PLASTIC, SOT-341, SSOP-28 |
| 文件頁數(shù)： | 41/48頁 |
| 文件大小： | 242K |
| 代理商： | 935263937118 |
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2 of 4
TDA6502; TDA6502A;
TDA6503; TDA6503A
50 or 31.25 kHz with a 4 MHz crystal.
Depending on the voltage applied to pin SW the device is operating in the IC-bus mode or 3-wire bus mode.
In the 3-wire bus mode, pin LOCK/ADC is the ‘lock’ output of the PLL and is at LOW level when the PLL is locked. Lock
detector bit FL of the status byte is set to logic 1 when the loop is locked and is read on the SDA line during a READ
operation in IC-bus mode only.
In the IC-bus mode only, pin LOCK/ADC is the ADC input for digital AFC control. The ADC code is read during a READ
operation on the IC-bus.
In the test mode, in both IC-bus mode and 3-wire bus mode, pin LOCK/ADC is used as a test output for f
REF and 1/2 fDIV.
IC-bus format
Five serial bytes (including the address byte) are required to address the device, select the VCO frequency, program the
four ports, set the charge pump current and set the reference divider ratio. The device has four independent IC-bus
addresses which can be selected by applying a specific voltage to pin CE/AS.
3-wire bus format
Data is transmitted to the device during a HIGH level on pin CE/AS (enable line). The device is accessible with 18-bit and
19-bit data formats. The first four bits are used to program the PMOS ports and the remaining bits control the
programmable divider. A 27-bit data format may also be used to set the charge pump current, the reference divider ratio
and the test modes.
It is not allowed to address the device with words whose length is different from 18, 19 or 27 bits.
Features
l
Single-chip 5 V mixer/oscillator and synthesizer for cable TV and VCR tuners
l
Pin-to-pin compatible with TDA6402, TDA6402A, TDA6403 and TDA6403A
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Universal bus protocol (IC-bus or 3-wire bus):
- Bus protocol for 18 or 19-bit transmission (3-wire bus)
- Extra protocol for 27-bit transmission (test modes and features for 3-wire bus)
- Address + 4 data bytes transmission (IC-bus ‘write’ mode)
- Address + 1 status byte (IC-bus ‘read’ mode)
- 4 independent IC-bus addresses.
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1 PMOS buffer for UHF band selection (25 mA)
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3 PMOS buffers for general purpose, e.g. 2 VHF sub-bands, FM sound trap (25 mA)
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