Página 86 - Lógica - Buffers, controladores, receptores, transceptores | Circuitos integrados | Heisener Electronics
Fale conosco
SalesDept@heisener.com 86-755-83210559-843
Login/Registrar
Language Translation

* Please refer to the English Version as our Official Version.

BOM
Carrinho 0

Lógica - Buffers, controladores, receptores, transceptores

Registros 15.562
Página  86/519
Imagem
Nº de peças
Fabricante
Descrição
pacote
Estoque
Quantidade
Number of Elements
Number of Bits per Element
Input Type
Output Type
Current - Output High, Low
Voltage - Supply
Operating Temperature
Mounting Type
Package / Case
Supplier Device Package
74ALVCH162832GRG4
Texas Instruments

IC ADDRESS REGISTER/DVR 64TSSOP

  • Logic Type: Address Driver
  • Number of Elements: 1
  • Number of Bits per Element: 1:4
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 12mA, 12mA
  • Voltage - Supply: 1.65 V ~ 3.6 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 64-TFSOP (0.240", 6.10mm Width)
  • Supplier Device Package: 64-TSSOP
pacote: 64-TFSOP (0.240", 6.10mm Width)
Estoque4.896
1
1:4
-
Push-Pull
12mA, 12mA
1.65 V ~ 3.6 V
-40°C ~ 85°C (TA)
Surface Mount
64-TFSOP (0.240", 6.10mm Width)
64-TSSOP
74LVTH652MTC
Fairchild/ON Semiconductor

IC TRANSCVR TRI-ST 8BIT 24TSSOP

  • Logic Type: Transceiver, Non-Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 32mA, 64mA
  • Voltage - Supply: 2.7 V ~ 3.6 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 24-TSSOP (0.173", 4.40mm Width)
  • Supplier Device Package: 24-TSSOP
pacote: 24-TSSOP (0.173", 4.40mm Width)
Estoque5.840
1
8
-
Push-Pull
32mA, 64mA
2.7 V ~ 3.6 V
-40°C ~ 85°C (TA)
Surface Mount
24-TSSOP (0.173", 4.40mm Width)
24-TSSOP
74AC241SJX
Fairchild/ON Semiconductor

IC BUFF/DVR TRI-ST DUAL 20SOP

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 4
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 2 V ~ 6 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (0.209", 5.30mm Width)
  • Supplier Device Package: 20-SOP
pacote: 20-SOIC (0.209", 5.30mm Width)
Estoque3.632
2
4
-
Push-Pull
24mA, 24mA
2 V ~ 6 V
-40°C ~ 85°C (TA)
Surface Mount
20-SOIC (0.209", 5.30mm Width)
20-SOP
74ACT541B
STMicroelectronics

IC BUFF/DVR TRI-ST 8BIT 20DIP

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -55°C ~ 125°C (TA)
  • Mounting Type: Through Hole
  • Package / Case: 20-DIP (0.300", 7.62mm)
  • Supplier Device Package: 20-DIP
pacote: 20-DIP (0.300", 7.62mm)
Estoque6.304
1
8
-
Push-Pull
24mA, 24mA
4.5 V ~ 5.5 V
-55°C ~ 125°C (TA)
Through Hole
20-DIP (0.300", 7.62mm)
20-DIP
N74F367D,602
NXP

IC BUFFER DVR HEX N-INV 16SOIC

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 2, 4 (Hex)
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 15mA, 64mA
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: 0°C ~ 70°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SO
pacote: 16-SOIC (0.154", 3.90mm Width)
Estoque4.592
2
2, 4 (Hex)
-
Push-Pull
15mA, 64mA
4.5 V ~ 5.5 V
0°C ~ 70°C (TA)
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SO
74LVC2952APW,118
NXP

IC REGISTERED TXRX 8BIT 24TSSOP

  • Logic Type: Transceiver, Non-Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 1.2 V ~ 3.6 V
  • Operating Temperature: -40°C ~ 125°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 24-TSSOP (0.173", 4.40mm Width)
  • Supplier Device Package: 24-TSSOP
pacote: 24-TSSOP (0.173", 4.40mm Width)
Estoque2.192
1
8
-
Push-Pull
24mA, 24mA
1.2 V ~ 3.6 V
-40°C ~ 125°C (TA)
Surface Mount
24-TSSOP (0.173", 4.40mm Width)
24-TSSOP
NLV74HC245ADWG
ON Semiconductor

IC BUS TX NONINV 20SOIC

  • Logic Type: Transceiver, Non-Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 7.8mA, 7.8mA
  • Voltage - Supply: 2 V ~ 6 V
  • Operating Temperature: -55°C ~ 125°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (0.295", 7.50mm Width)
  • Supplier Device Package: 20-SOIC
pacote: 20-SOIC (0.295", 7.50mm Width)
Estoque7.216
1
8
-
Push-Pull
7.8mA, 7.8mA
2 V ~ 6 V
-55°C ~ 125°C (TA)
Surface Mount
20-SOIC (0.295", 7.50mm Width)
20-SOIC
MM74HCT541MTC
Fairchild/ON Semiconductor

IC BUFF/DVR TRI-ST 8BIT 20TSSOP

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 7.2mA, 7.2mA
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-TSSOP (0.173", 4.40mm Width)
  • Supplier Device Package: 20-TSSOP
pacote: 20-TSSOP (0.173", 4.40mm Width)
Estoque4.464
1
8
-
Push-Pull
7.2mA, 7.2mA
4.5 V ~ 5.5 V
-40°C ~ 85°C (TA)
Surface Mount
20-TSSOP (0.173", 4.40mm Width)
20-TSSOP
74LVC2G241GN,115
Nexperia USA Inc.

IC BUFFER/LINE DVR 3ST 8XSON

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 1
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 32mA, 32mA
  • Voltage - Supply: 1.65 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 125°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 8-XFDFN
  • Supplier Device Package: 8-XSON, SOT1116 (1.2x1)
pacote: 8-XFDFN
Estoque4.640
2
1
-
Push-Pull
32mA, 32mA
1.65 V ~ 5.5 V
-40°C ~ 125°C (TA)
Surface Mount
8-XFDFN
8-XSON, SOT1116 (1.2x1)
74LVCH244AD,118
Nexperia USA Inc.

IC BUFF/DVR TRI-ST DUAL 20SOIC

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 4
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 1.2 V ~ 3.6 V
  • Operating Temperature: -40°C ~ 125°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (0.295", 7.50mm Width)
  • Supplier Device Package: 20-SO
pacote: 20-SOIC (0.295", 7.50mm Width)
Estoque7.552
2
4
-
Push-Pull
24mA, 24mA
1.2 V ~ 3.6 V
-40°C ~ 125°C (TA)
Surface Mount
20-SOIC (0.295", 7.50mm Width)
20-SO
CY74FCT2245TQCT
Texas Instruments

IC OCTAL BUS TXRX 3ST 20QSOP

  • Logic Type: Transceiver, Non-Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 15mA, 12mA
  • Voltage - Supply: 4.75 V ~ 5.25 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SSOP (0.154", 3.90mm Width)
  • Supplier Device Package: 20-SSOP/QSOP
pacote: 20-SSOP (0.154", 3.90mm Width)
Estoque5.216
1
8
-
Push-Pull
15mA, 12mA
4.75 V ~ 5.25 V
-40°C ~ 85°C (TA)
Surface Mount
20-SSOP (0.154", 3.90mm Width)
20-SSOP/QSOP
74FCT162244ATPVG8
IDT, Integrated Device Technology Inc

IC BUFF DVR 16BIT N-INV 48SSOP

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 4
  • Number of Bits per Element: 4
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 48-BSSOP (0.295", 7.50mm Width)
  • Supplier Device Package: 48-SSOP
pacote: 48-BSSOP (0.295", 7.50mm Width)
Estoque7.312
4
4
-
Push-Pull
24mA, 24mA
4.5 V ~ 5.5 V
-40°C ~ 85°C (TA)
Surface Mount
48-BSSOP (0.295", 7.50mm Width)
48-SSOP
SN74AHCT541NSR
Texas Instruments

IC BUFF/DVR TRI-ST 8BIT 20SO

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 8mA, 8mA
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 125°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (0.209", 5.30mm Width)
  • Supplier Device Package: 20-SO
pacote: 20-SOIC (0.209", 5.30mm Width)
Estoque5.456
1
8
-
Push-Pull
8mA, 8mA
4.5 V ~ 5.5 V
-40°C ~ 125°C (TA)
Surface Mount
20-SOIC (0.209", 5.30mm Width)
20-SO
hot MM74HC245AWM
Fairchild/ON Semiconductor

IC TRANSCEIVER 3-ST 8BIT 20SOIC

  • Logic Type: Transceiver, Non-Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 7.8mA, 7.8mA
  • Voltage - Supply: 2 V ~ 6 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (0.295", 7.50mm Width)
  • Supplier Device Package: 20-SOIC
pacote: 20-SOIC (0.295", 7.50mm Width)
Estoque7.456
1
8
-
Push-Pull
7.8mA, 7.8mA
2 V ~ 6 V
-40°C ~ 85°C (TA)
Surface Mount
20-SOIC (0.295", 7.50mm Width)
20-SOIC
hot SN74HC241PWR
Texas Instruments

IC BUFF/DVR TRI-ST DUAL 20TSSOP

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 4
  • Input Type: -
  • Output Type: Push-Pull
  • Current - Output High, Low: 7.8mA, 7.8mA
  • Voltage - Supply: 2 V ~ 6 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-TSSOP (0.173", 4.40mm Width)
  • Supplier Device Package: 20-TSSOP
pacote: 20-TSSOP (0.173", 4.40mm Width)
Estoque6.112
2
4
-
Push-Pull
7.8mA, 7.8mA
2 V ~ 6 V
-40°C ~ 85°C (TA)
Surface Mount
20-TSSOP (0.173", 4.40mm Width)
20-TSSOP
hot 74VHC541M
ON Semiconductor

IC BUF NON-INVERT 5.5V 20SOIC

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: 3-State
  • Current - Output High, Low: 8mA, 8mA
  • Voltage - Supply: 2 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (0.295", 7.50mm Width)
  • Supplier Device Package: 20-SOIC
pacote: 20-SOIC (0.295", 7.50mm Width)
Estoque5.344
1
8
-
3-State
8mA, 8mA
2 V ~ 5.5 V
-40°C ~ 85°C (TA)
Surface Mount
20-SOIC (0.295", 7.50mm Width)
20-SOIC
hot 74LCX540FT
Toshiba Semiconductor and Storage

IC BUFFER INVERT 3.6V 20TSSOP

  • Logic Type: Buffer, Inverting
  • Number of Elements: 1
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: 3-State
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 1.65 V ~ 3.6 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-TSSOP (0.173", 4.40mm Width)
  • Supplier Device Package: 20-TSSOP
pacote: 20-TSSOP (0.173", 4.40mm Width)
Estoque13.008
1
8
-
3-State
24mA, 24mA
1.65 V ~ 3.6 V
-40°C ~ 85°C (TA)
Surface Mount
20-TSSOP (0.173", 4.40mm Width)
20-TSSOP
hot 74LCX244WMX
ON Semiconductor

IC BUF NON-INVERT 3.6V 20SOIC

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 4
  • Input Type: -
  • Output Type: 3-State
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 2 V ~ 3.6 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (0.295", 7.50mm Width)
  • Supplier Device Package: 20-SOIC
pacote: 20-SOIC (0.295", 7.50mm Width)
Estoque5.344
2
4
-
3-State
24mA, 24mA
2 V ~ 3.6 V
-40°C ~ 85°C (TA)
Surface Mount
20-SOIC (0.295", 7.50mm Width)
20-SOIC
NC7WZ07P6
ON Semiconductor

IC BUF NON-INVERT 5.5V SC70-6

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 1
  • Input Type: -
  • Output Type: Open Drain
  • Current - Output High, Low: -, 32mA
  • Voltage - Supply: 1.65 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 6-TSSOP, SC-88, SOT-363
  • Supplier Device Package: SC-70-6
pacote: 6-TSSOP, SC-88, SOT-363
Estoque19.104
2
1
-
Open Drain
-, 32mA
1.65 V ~ 5.5 V
-40°C ~ 85°C (TA)
Surface Mount
6-TSSOP, SC-88, SOT-363
SC-70-6
hot 74ACT244SCX
ON Semiconductor

IC BUF NON-INVERT 5.5V 20SOIC

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 4
  • Input Type: -
  • Output Type: 3-State
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (0.295", 7.50mm Width)
  • Supplier Device Package: 20-SOIC
pacote: 20-SOIC (0.295", 7.50mm Width)
Estoque9.960
2
4
-
3-State
24mA, 24mA
4.5 V ~ 5.5 V
-40°C ~ 85°C (TA)
Surface Mount
20-SOIC (0.295", 7.50mm Width)
20-SOIC
CY74FCT163543CPACT
Texas Instruments

BUS TRANSCEIVER, FCT SERIES

  • Logic Type: -
  • Number of Elements: -
  • Number of Bits per Element: -
  • Input Type: -
  • Output Type: -
  • Current - Output High, Low: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
pacote: -
Request a Quote
-
-
-
-
-
-
-
-
-
-
QS74FCT2541ATZ
Quality Semiconductor

BUS DRIVER, FCT SERIES

  • Logic Type: -
  • Number of Elements: -
  • Number of Bits per Element: -
  • Input Type: -
  • Output Type: -
  • Current - Output High, Low: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
pacote: -
Request a Quote
-
-
-
-
-
-
-
-
-
-
SN74LVTR245DWR
Texas Instruments

BUS TRANSCEIVER

  • Logic Type: -
  • Number of Elements: -
  • Number of Bits per Element: -
  • Input Type: -
  • Output Type: -
  • Current - Output High, Low: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
pacote: -
Request a Quote
-
-
-
-
-
-
-
-
-
-
MC74ACT125M
onsemi

BUS DRIVER, ACT SERIES

  • Logic Type: -
  • Number of Elements: -
  • Number of Bits per Element: -
  • Input Type: -
  • Output Type: -
  • Current - Output High, Low: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
pacote: -
Request a Quote
-
-
-
-
-
-
-
-
-
-
MC74ACT240M
Motorola

IC BUFFER INVERT 5.5V 20SOIC

  • Logic Type: Buffer, Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 4
  • Input Type: -
  • Output Type: 3-State
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 4.5V ~ 5.5V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-SOIC (0.209", 5.30mm Width)
  • Supplier Device Package: 20-SOIC
pacote: -
Request a Quote
2
4
-
3-State
24mA, 24mA
4.5V ~ 5.5V
-40°C ~ 85°C (TA)
Surface Mount
20-SOIC (0.209", 5.30mm Width)
20-SOIC
SN74BCT29823NT
Texas Instruments

BUS DRIVER, BCT/FBT SERIES

  • Logic Type: -
  • Number of Elements: -
  • Number of Bits per Element: -
  • Input Type: -
  • Output Type: -
  • Current - Output High, Low: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
pacote: -
Request a Quote
-
-
-
-
-
-
-
-
-
-
74LVC16245ADGVR-P
Texas Instruments

PROTOTYPE

  • Logic Type: Transceiver, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 8
  • Input Type: -
  • Output Type: 3-State
  • Current - Output High, Low: 24mA, 24mA
  • Voltage - Supply: 1.65V ~ 3.6V
  • Operating Temperature: -40°C ~ 125°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 48-TFSOP (0.173", 4.40mm Width)
  • Supplier Device Package: 48-TVSOP
pacote: -
Request a Quote
2
8
-
3-State
24mA, 24mA
1.65V ~ 3.6V
-40°C ~ 125°C (TA)
Surface Mount
48-TFSOP (0.173", 4.40mm Width)
48-TVSOP
SNJ54F540J
Texas Instruments

BUS DRIVER, 8-BIT, TTL

  • Logic Type: -
  • Number of Elements: -
  • Number of Bits per Element: -
  • Input Type: -
  • Output Type: -
  • Current - Output High, Low: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
pacote: -
Request a Quote
-
-
-
-
-
-
-
-
-
-
74F552SC
Rochester Electronics, LLC

REGISTERED BUS TRANSCEIVER, F/FA

  • Logic Type: -
  • Number of Elements: -
  • Number of Bits per Element: -
  • Input Type: -
  • Output Type: -
  • Current - Output High, Low: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
pacote: -
Request a Quote
-
-
-
-
-
-
-
-
-
-
SN54AS244AJ
Texas Instruments

MILITARY 8-CH, 4.5-V TO 5.5-V BI

  • Logic Type: Buffer, Non-Inverting
  • Number of Elements: 2
  • Number of Bits per Element: 4
  • Input Type: -
  • Output Type: 3-State
  • Current - Output High, Low: 15mA, 64mA
  • Voltage - Supply: 4.5V ~ 5.5V
  • Operating Temperature: -55°C ~ 125°C (TA)
  • Mounting Type: Through Hole
  • Package / Case: 20-CDIP (0.300", 7.62mm)
  • Supplier Device Package: 20-CDIP
pacote: -
Request a Quote
2
4
-
3-State
15mA, 64mA
4.5V ~ 5.5V
-55°C ~ 125°C (TA)
Through Hole
20-CDIP (0.300", 7.62mm)
20-CDIP