ページ 34 - ロジック - 信号スイッチ、マルチプレクサ、デコーダ | 集積回路（IC） | Heisener Electronics
連絡先
SalesDept@heisener.com +86-755-83210559-810
ログイン/登録
Language Translation

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

BOM
カート 0

ロジック - 信号スイッチ、マルチプレクサ、デコーダ

レコード 8,762
ページ  34/293
画像
部品番号
メーカ
説明
パッケージ
在庫
数量
Circuit
Independent Circuits
Current - Output High, Low
Voltage Supply Source
Voltage - Supply
Operating Temperature
Mounting Type
Package / Case
Supplier Device Package
DS10CP154TSQX/NOPB
Texas Instruments

IC CROSSPOINT SWITCH 4X4 40WQFN

  • Type: Crosspoint Switch
  • Circuit: 1 x 4:4
  • Independent Circuits: 1
  • Current - Output High, Low: -
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 3 V ~ 3.6 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 40-WFQFN Exposed Pad
  • Supplier Device Package: 40-WQFN (6x6)
パッケージ: 40-WFQFN Exposed Pad
在庫5,632
1 x 4:4
1
-
Single Supply
3 V ~ 3.6 V
-40°C ~ 85°C
Surface Mount
40-WFQFN Exposed Pad
40-WQFN (6x6)
CD40147BM96
Texas Instruments

IC BCD PRIORITY ENCODER 16-SOIC

  • Type: Priority Encoder
  • Circuit: 10 x 1:4
  • Independent Circuits: 1
  • Current - Output High, Low: 6.8mA, 6.8mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 3 V ~ 18 V
  • Operating Temperature: -55°C ~ 125°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SOIC
パッケージ: 16-SOIC (0.154", 3.90mm Width)
在庫3,920
10 x 1:4
1
6.8mA, 6.8mA
Single Supply
3 V ~ 18 V
-55°C ~ 125°C
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
NB100LVEP56MN
ON Semiconductor

IC MUX DUAL 2:1 DIFF ECL 24QFN

  • Type: Differential Digital Multiplexer
  • Circuit: 2 x 2:1
  • Independent Circuits: 1
  • Current - Output High, Low: -
  • Voltage Supply Source: Dual Supply
  • Voltage - Supply: ±2.375 V ~ 3.8 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 24-VFQFN Exposed Pad
  • Supplier Device Package: 24-QFN (4x4)
パッケージ: 24-VFQFN Exposed Pad
在庫5,744
2 x 2:1
1
-
Dual Supply
±2.375 V ~ 3.8 V
-40°C ~ 85°C
Surface Mount
24-VFQFN Exposed Pad
24-QFN (4x4)
SN74LS145DG4
Texas Instruments

IC DECODER SINGLE 16SOIC

  • Type: Decoder
  • Circuit: 1 x 4:10
  • Independent Circuits: 1
  • Current - Output High, Low: -, 80mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.75 V ~ 5.25 V
  • Operating Temperature: 0°C ~ 70°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SOIC
パッケージ: 16-SOIC (0.154", 3.90mm Width)
在庫5,440
1 x 4:10
1
-, 80mA
Single Supply
4.75 V ~ 5.25 V
0°C ~ 70°C
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
SN74LS257BDG4
Texas Instruments

IC DATA SELECTOR/MUX SGL 16SOIC

  • Type: Multiplexer
  • Circuit: 4 x 2:1
  • Independent Circuits: 1
  • Current - Output High, Low: 2.6mA, 24mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.75 V ~ 5.25 V
  • Operating Temperature: 0°C ~ 70°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SOIC
パッケージ: 16-SOIC (0.154", 3.90mm Width)
在庫6,304
4 x 2:1
1
2.6mA, 24mA
Single Supply
4.75 V ~ 5.25 V
0°C ~ 70°C
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
SN74CBTLV3257DG4
Texas Instruments

IC FET MUX/DEMUX SGL 16SOIC

  • Type: Multiplexer/Demultiplexer
  • Circuit: 4 x 2:1
  • Independent Circuits: 1
  • Current - Output High, Low: -
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 2.3 V ~ 3.6 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SOIC
パッケージ: 16-SOIC (0.154", 3.90mm Width)
在庫3,200
4 x 2:1
1
-
Single Supply
2.3 V ~ 3.6 V
-40°C ~ 85°C
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
NLV74HC251ADR2G
ON Semiconductor

IC MULTIPLEXER 8INPUT 16SOIC

  • Type: Multiplexer
  • Circuit: 1 x 8:1
  • Independent Circuits: 1
  • Current - Output High, Low: 5.2mA, 5.2mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 2 V ~ 6 V
  • Operating Temperature: -55°C ~ 125°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SOIC
パッケージ: 16-SOIC (0.154", 3.90mm Width)
在庫2,992
1 x 8:1
1
5.2mA, 5.2mA
Single Supply
2 V ~ 6 V
-55°C ~ 125°C
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
CD74HCT153MG4
Texas Instruments

IC DUAL 4-IN MUX HS 16-SOIC

  • Type: Multiplexer
  • Circuit: 2 x 4:1
  • Independent Circuits: 1
  • Current - Output High, Low: 4mA, 4mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -55°C ~ 125°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SOIC
パッケージ: 16-SOIC (0.154", 3.90mm Width)
在庫6,816
2 x 4:1
1
4mA, 4mA
Single Supply
4.5 V ~ 5.5 V
-55°C ~ 125°C
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
74AHCT139PW,118
Nexperia USA Inc.

IC DUAL 2:4 DECODR/DEMUX 16TSSOP

  • Type: Decoder/Demultiplexer
  • Circuit: 1 x 2:4
  • Independent Circuits: 2
  • Current - Output High, Low: 8mA, 8mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 125°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-TSSOP (0.173", 4.40mm Width)
  • Supplier Device Package: 16-TSSOP
パッケージ: 16-TSSOP (0.173", 4.40mm Width)
在庫7,648
1 x 2:4
2
8mA, 8mA
Single Supply
4.5 V ~ 5.5 V
-40°C ~ 125°C
Surface Mount
16-TSSOP (0.173", 4.40mm Width)
16-TSSOP
CD74HCT253M
Texas Instruments

IC DUAL 4-IN MUX 16-SOIC

  • Type: Multiplexer
  • Circuit: 2 x 4:1
  • Independent Circuits: 1
  • Current - Output High, Low: 4mA, 4mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -55°C ~ 125°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SOIC
パッケージ: 16-SOIC (0.154", 3.90mm Width)
在庫16,404
2 x 4:1
1
4mA, 4mA
Single Supply
4.5 V ~ 5.5 V
-55°C ~ 125°C
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
hot SN74AHCT157D
Texas Instruments

IC QUAD 2-1 DATASEL/MUX 16-SOIC

  • Type: Multiplexer
  • Circuit: 4 x 2:1
  • Independent Circuits: 1
  • Current - Output High, Low: 8mA, 8mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SOIC
パッケージ: 16-SOIC (0.154", 3.90mm Width)
在庫15,204
4 x 2:1
1
8mA, 8mA
Single Supply
4.5 V ~ 5.5 V
-40°C ~ 85°C
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
hot ADG3257BRQZ
Analog Devices Inc.

IC MUX QUAD 3.3/5V HS 16-QSOP

  • Type: Multiplexer/Demultiplexer
  • Circuit: 4 x 2:1
  • Independent Circuits: 1
  • Current - Output High, Low: -
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 3 V ~ 3.6 V, 4.5 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SSOP (0.154", 3.90mm Width)
  • Supplier Device Package: 16-QSOP
パッケージ: 16-SSOP (0.154", 3.90mm Width)
在庫91,236
4 x 2:1
1
-
Single Supply
3 V ~ 3.6 V, 4.5 V ~ 5.5 V
-40°C ~ 85°C
Surface Mount
16-SSOP (0.154", 3.90mm Width)
16-QSOP
74AUP2G157GM,125
Nexperia USA Inc.

IC MUX 2-IN SINGLE LP 8-XQFN

  • Type: Multiplexer
  • Circuit: 1 x 2:1
  • Independent Circuits: 1
  • Current - Output High, Low: 4mA, 4mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 0.8 V ~ 3.6 V
  • Operating Temperature: -40°C ~ 125°C
  • Mounting Type: Surface Mount
  • Package / Case: 8-XFQFN Exposed Pad
  • Supplier Device Package: 8-XQFN (1.6x1.6)
パッケージ: 8-XFQFN Exposed Pad
在庫3,760
1 x 2:1
1
4mA, 4mA
Single Supply
0.8 V ~ 3.6 V
-40°C ~ 125°C
Surface Mount
8-XFQFN Exposed Pad
8-XQFN (1.6x1.6)
hot SN74ALS138ADR
Texas Instruments

IC 3-8 LINE DECODE/DEMUX 16-SOIC

  • Type: Decoder/Demultiplexer
  • Circuit: 1 x 3:8
  • Independent Circuits: 1
  • Current - Output High, Low: 400µA, 8mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: 0°C ~ 70°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-SOIC (0.154", 3.90mm Width)
  • Supplier Device Package: 16-SOIC
パッケージ: 16-SOIC (0.154", 3.90mm Width)
在庫19,620
1 x 3:8
1
400µA, 8mA
Single Supply
4.5 V ~ 5.5 V
0°C ~ 70°C
Surface Mount
16-SOIC (0.154", 3.90mm Width)
16-SOIC
hot 74ACT139MTC
Fairchild/ON Semiconductor

DECODER/DEMUX 1-OF-4 16TSSOP

  • Type: Decoder/Demultiplexer
  • Circuit: 1 x 2:4
  • Independent Circuits: 2
  • Current - Output High, Low: 24mA, 24mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-TSSOP (0.173", 4.40mm Width)
  • Supplier Device Package: 16-TSSOP
パッケージ: 16-TSSOP (0.173", 4.40mm Width)
在庫5,840
1 x 2:4
2
24mA, 24mA
Single Supply
4.5 V ~ 5.5 V
-40°C ~ 85°C
Surface Mount
16-TSSOP (0.173", 4.40mm Width)
16-TSSOP
PI3CH800ZHEX
Diodes Incorporated

IC SWITCH 8CH 2PORT 20TQFN

  • Type: Bus Switch
  • Circuit: 1 x 8:8
  • Independent Circuits: 1
  • Current - Output High, Low: -
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 1.8V, 2.5V, 3.3V
  • Operating Temperature: -40°C ~ 85°C (TA)
  • Mounting Type: Surface Mount
  • Package / Case: 20-WFQFN Exposed Pad
  • Supplier Device Package: 20-TQFN-EP (3.5x4.5)
パッケージ: 20-WFQFN Exposed Pad
在庫32,286
1 x 8:8
1
-
Single Supply
1.8V, 2.5V, 3.3V
-40°C ~ 85°C (TA)
Surface Mount
20-WFQFN Exposed Pad
20-TQFN-EP (3.5x4.5)
hot CD4555BE
Texas Instruments

IC DECODER/DEMUX DUAL 16-DIP

  • Type: Decoder/Demultiplexer
  • Circuit: 1 x 2:4
  • Independent Circuits: 2
  • Current - Output High, Low: 6.8mA, 6.8mA
  • Voltage Supply Source: Dual Supply
  • Voltage - Supply: 3 V ~ 18 V
  • Operating Temperature: -55°C ~ 125°C
  • Mounting Type: Through Hole
  • Package / Case: 16-DIP (0.300", 7.62mm)
  • Supplier Device Package: 16-PDIP
パッケージ: 16-DIP (0.300", 7.62mm)
在庫19,248
1 x 2:4
2
6.8mA, 6.8mA
Dual Supply
3 V ~ 18 V
-55°C ~ 125°C
Through Hole
16-DIP (0.300", 7.62mm)
16-PDIP
hot FST3253QSCX
ON Semiconductor

MUX/DEMUX DUAL 4:1 TTL 16QSOP

  • Type: Multiplexer/Demultiplexer
  • Circuit: 2 x 4:1
  • Independent Circuits: 1
  • Current - Output High, Low: -
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-LSSOP (0.154", 3.90mm Width)
  • Supplier Device Package: 16-QSOP
パッケージ: 16-LSSOP (0.154", 3.90mm Width)
在庫28,968
2 x 4:1
1
-
Single Supply
4 V ~ 5.5 V
-40°C ~ 85°C
Surface Mount
16-LSSOP (0.154", 3.90mm Width)
16-QSOP
hot FST3126QSC
ON Semiconductor

IC SWITCH BUS 4BIT TTL 16QSOP

  • Type: Bus Switch
  • Circuit: 1 x 1:1
  • Independent Circuits: 4
  • Current - Output High, Low: -
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-LSSOP (0.154", 3.90mm Width)
  • Supplier Device Package: 16-QSOP
パッケージ: 16-LSSOP (0.154", 3.90mm Width)
在庫14,568
1 x 1:1
4
-
Single Supply
4 V ~ 5.5 V
-40°C ~ 85°C
Surface Mount
16-LSSOP (0.154", 3.90mm Width)
16-QSOP
NC7SZD384L6X
ON Semiconductor

IC BUS SWITCH 1BIT LEVEL 6MCRPAK

  • Type: Bus Switch
  • Circuit: 1 x 1:1
  • Independent Circuits: 1
  • Current - Output High, Low: -
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.5 V ~ 5.5 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 6-UFDFN
  • Supplier Device Package: 6-MicroPak
パッケージ: 6-UFDFN
在庫7,760
1 x 1:1
1
-
Single Supply
4.5 V ~ 5.5 V
-40°C ~ 85°C
Surface Mount
6-UFDFN
6-MicroPak
hot 74AC153MTCX
ON Semiconductor

MULTIPLEXER DUAL 4IN HS 16TSSOP

  • Type: Multiplexer
  • Circuit: 2 x 4:1
  • Independent Circuits: 1
  • Current - Output High, Low: 24mA, 24mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 2 V ~ 6 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 16-TSSOP (0.173", 4.40mm Width)
  • Supplier Device Package: 16-TSSOP
パッケージ: 16-TSSOP (0.173", 4.40mm Width)
在庫40,608
2 x 4:1
1
24mA, 24mA
Single Supply
2 V ~ 6 V
-40°C ~ 85°C
Surface Mount
16-TSSOP (0.173", 4.40mm Width)
16-TSSOP
hot MM74C923N
ON Semiconductor

IC ENCODER 20-KEY 20-DIP

  • Type: 20-Key Encoder
  • Circuit: 1 x 9:4
  • Independent Circuits: 1
  • Current - Output High, Low: 15mA, 16mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 3 V ~ 15 V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Through Hole
  • Package / Case: 20-DIP (0.300", 7.62mm)
  • Supplier Device Package: 20-PDIP
パッケージ: 20-DIP (0.300", 7.62mm)
在庫23,760
1 x 9:4
1
15mA, 16mA
Single Supply
3 V ~ 15 V
-40°C ~ 85°C
Through Hole
20-DIP (0.300", 7.62mm)
20-PDIP
74151ADC
National Semiconductor

MULTIPLEXER 8 LINE INPUT, TTL

  • Type: Data Selector/Multiplexer
  • Circuit: 1 x 8:1
  • Independent Circuits: 1
  • Current - Output High, Low: -
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.75V ~ 5.25V
  • Operating Temperature: 0°C ~ 70°C
  • Mounting Type: Through Hole
  • Package / Case: 16-CDIP (0.300", 7.62mm)
  • Supplier Device Package: 16-CDIP
パッケージ: -
Request a Quote
1 x 8:1
1
-
Single Supply
4.75V ~ 5.25V
0°C ~ 70°C
Through Hole
16-CDIP (0.300", 7.62mm)
16-CDIP
SN74ALS131N
Texas Instruments

IC DECODER/DRIVER ALS SERIES

  • Type: -
  • Circuit: -
  • Independent Circuits: -
  • Current - Output High, Low: -
  • Voltage Supply Source: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
パッケージ: -
Request a Quote
-
-
-
-
-
-
-
-
-
QS3L383P
Quality Semiconductor

QS3L383 - BUS EXCHANGER, 10-BIT,

  • Type: -
  • Circuit: -
  • Independent Circuits: -
  • Current - Output High, Low: -
  • Voltage Supply Source: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
パッケージ: -
Request a Quote
-
-
-
-
-
-
-
-
-
ADG3247BCPZ-REEL
Analog Devices Inc.

16 BIT, 2 PORT BUS SWITCH

  • Type: Bus Switch
  • Circuit: 8 x 1:1
  • Independent Circuits: 2
  • Current - Output High, Low: -
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 2.3V ~ 3.6V
  • Operating Temperature: -40°C ~ 85°C
  • Mounting Type: Surface Mount
  • Package / Case: 40-WFQFN Exposed Pad, CSP
  • Supplier Device Package: 40-LFCSP-WQ (6x6)
パッケージ: -
Request a Quote
8 x 1:1
2
-
Single Supply
2.3V ~ 3.6V
-40°C ~ 85°C
Surface Mount
40-WFQFN Exposed Pad, CSP
40-LFCSP-WQ (6x6)
CD54HCT151F3A
Texas Instruments

HIGH SPEED CMOS LOGIC 8-INPUT MU

  • Type: Data Selector/Multiplexer
  • Circuit: 1 x 8:1
  • Independent Circuits: 1
  • Current - Output High, Low: 4mA, 4mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.5V ~ 5.5V
  • Operating Temperature: -55°C ~ 125°C
  • Mounting Type: Through Hole
  • Package / Case: 16-CDIP (0.300", 7.62mm)
  • Supplier Device Package: 16-CDIP
パッケージ: -
Request a Quote
1 x 8:1
1
4mA, 4mA
Single Supply
4.5V ~ 5.5V
-55°C ~ 125°C
Through Hole
16-CDIP (0.300", 7.62mm)
16-CDIP
5962-86869012A
Texas Instruments

SN54ALS157A QUADRUPLE 1-OF-2 DAT

  • Type: -
  • Circuit: -
  • Independent Circuits: -
  • Current - Output High, Low: -
  • Voltage Supply Source: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
パッケージ: -
Request a Quote
-
-
-
-
-
-
-
-
-
CD2M3494E
Harris Corporation

16 X 8 X 1 BIMOS-E CROSSPOINT AN

  • Type: -
  • Circuit: -
  • Independent Circuits: -
  • Current - Output High, Low: -
  • Voltage Supply Source: -
  • Voltage - Supply: -
  • Operating Temperature: -
  • Mounting Type: -
  • Package / Case: -
  • Supplier Device Package: -
パッケージ: -
Request a Quote
-
-
-
-
-
-
-
-
-
SNJ54LS257BJ
Texas Instruments

QUADRUPLE 2-LINE TO 1-LINE DATA

  • Type: Data Selector/Multiplexer
  • Circuit: 4 x 2:1
  • Independent Circuits: 1
  • Current - Output High, Low: 1mA, 12mA
  • Voltage Supply Source: Single Supply
  • Voltage - Supply: 4.5V ~ 5.5V
  • Operating Temperature: -55°C ~ 125°C
  • Mounting Type: Through Hole
  • Package / Case: 16-CDIP (0.300", 7.62mm)
  • Supplier Device Package: 16-CDIP
パッケージ: -
Request a Quote
4 x 2:1
1
1mA, 12mA
Single Supply
4.5V ~ 5.5V
-55°C ~ 125°C
Through Hole
16-CDIP (0.300", 7.62mm)
16-CDIP