(Singapore)
Product Summary
The PCF7946 is a high performance monolithic Security Transponder and Remote Keyless Entry Chip ideally suited for car immobiliser applications that incorporate keyless entry functions. The PCF7946 transponder circuitry is compatible with the Security Transponder PCF7936AS to support mixed systems using a HITAG2PLUS and a standard Security Transponder, PCF7936AS at the same time. The PCF7946 meets the security and performance requirements of modern car immobiliser applications.
Parametrics
PCF7946 absolute maximum ratings: (1)Four user buttons (15 + 1 commands); (2)LED acknowledgment of transmission; (3)42 bit unidirectional code hopping; (4)48 bit Remote Secret Key; (5)114 bit message with run-in, device identification, function code, terminator and parity bits; (6)Automatic code synchronisation via transponder; (7)Programmable data rate and frame repetition rate; (8)Clock input to support external data rate reference; (9)Manchester encoding; (10)Low tolerance on-chip RC oscillator (＜±10%); (11)Battery low indication; (12) Single cell operation (2.0V to 3.6V); (13) Low power consumption (ACTIVE: 0.3mA, POWER DOWN: 300nA).
Features
PCF7946 features: (1) Compatible with Security Transponder, PCF7936AS; (2) Rolling Code Generator for keyless entry; (3)14-pin SO package.
Diagrams
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 PCF7946AT |
Other |
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Data Sheet |
Negotiable |
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| Image | Part No | Mfg | Description | |
Pricing (USD) |
Quantity | ||||||||||||
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PCF7900NHN/C0K,112 |
NXP Semiconductors |
RF Transmitter FRACTIONAL-N-PLL UHF TRANSMITTER ISM |
Data Sheet |
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PCF7900NHN/C0K,118 |
NXP Semiconductors |
RF Transmitter Fractional-N-PLL UHF Transmitter |
Data Sheet |
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PCF7900VHN/C0L,112 |
NXP Semiconductors |
RF Transmitter FRACTIONAL-N-PLL UHF TRANSMITTER ISM |
Data Sheet |
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PCF7900VHN/C0L,118 |
NXP Semiconductors |
RF Transmitter FRACTIONAL-N-PLL UHF TRANSMITTER ISM |
Data Sheet |
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PCF7921ATSM2AB1200 |
NXP Semiconductors |
RF Wireless Misc REMOTE KEYLESS ENTRY |
Data Sheet |
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PCF7921ATT/3601/2A |
NXP Semiconductors |
RF Wireless Misc PCF7921ATT/TSSOP20/REEL13360 |
Data Sheet |
Negotiable |
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