|
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 28LD64KB DMA 40MIPS
- dsPIC33FJ64GP802-I/SP
- Microchip Technology
-
1:
$9.44
-
157In Stock
|
Mouser Part No
579-DSPIC364GP802ISP
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 28LD64KB DMA 40MIPS
|
|
157In Stock
|
|
|
$9.44
|
|
|
$8.65
|
|
|
$7.83
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33FJ
|
1 Core
|
40 MHz
|
SPDIP-28
|
64 kB
|
16 kB
|
3 V to 3.6 V
|
dsPIC33FJ64GP802
|
dsPIC
|
Through Hole
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 64KB Flash, 8KB RAM, 100MHz, 48Pin, 3 OpAmp, 3 Comp, PTG
- dsPIC33CK64MP205-I/PT
- Microchip Technology
-
1:
$2.79
-
717In Stock
|
Mouser Part No
579-PIC33CK64MP205I
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 64KB Flash, 8KB RAM, 100MHz, 48Pin, 3 OpAmp, 3 Comp, PTG
|
|
717In Stock
|
|
|
$2.79
|
|
|
$2.57
|
|
|
$2.39
|
|
|
$2.37
|
|
|
View
|
|
|
$2.31
|
|
|
$2.30
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CK
|
1 Core
|
100 MHz
|
TQFP-48
|
64 kB
|
8 kB
|
3 V to 3.6 V
|
dsPIC33CK64MP205
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tray
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 256KB ECC Flash, 16KB RAM
- dsPIC33EV256GM002-E/SO
- Microchip Technology
-
1:
$7.82
-
190In Stock
|
Mouser Part No
579-33EV256GM002ESO
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 256KB ECC Flash, 16KB RAM
|
|
190In Stock
|
|
|
$7.82
|
|
|
$6.64
|
|
|
$6.46
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
SOIC-28
|
256 kB
|
16 kB
|
4.5 V to 5.5 V
|
dsPIC33EV256GM002
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 32KB ECC Flash, 4KB RAM, 60 MHz, 6 MC PWM, 3 Op Amps, CTMU, SENT
- dsPIC33EV32GM004-I/P8
- Microchip Technology
-
1:
$5.21
-
247In Stock
|
Mouser Part No
579-33EV32GM004-I/P8
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 32KB ECC Flash, 4KB RAM, 60 MHz, 6 MC PWM, 3 Op Amps, CTMU, SENT
|
|
247In Stock
|
|
|
$5.21
|
|
|
$4.79
|
|
|
$4.77
|
|
|
$4.75
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
TQFP-48
|
32 kB
|
4 kB
|
5 V
|
dsPIC33EV32GM004
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tray
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 32KB ECC Flash, 4KB RAM, 60 MHz, CAN, 6 MC PWM, 3 Op Amps, CTMU, SENT
- dsPIC33EV32GM103-I/M5
- Microchip Technology
-
1:
$5.18
-
214In Stock
|
Mouser Part No
579-3EV32GM103IM5
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 32KB ECC Flash, 4KB RAM, 60 MHz, CAN, 6 MC PWM, 3 Op Amps, CTMU, SENT
|
|
214In Stock
|
|
|
$5.18
|
|
|
$5.17
|
|
|
$4.96
|
|
|
$4.50
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
UQFN-36
|
32 kB
|
4 kB
|
4.5 V to 5.5 V
|
dsPIC33EV32GM103
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 40MIPS 64KB
- dsPIC33FJ64GP708-I/PT
- Microchip Technology
-
1:
$11.98
-
121In Stock
|
Mouser Part No
579-DS33FJ64GP708IPT
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 40MIPS 64KB
|
|
121In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33FJ
|
1 Core
|
40 MHz
|
TQFP-80
|
64 kB
|
16 kB
|
3 V to 3.6 V
|
dsPIC33FJ64GP708-
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 212KB Flash 1024BRAM 40MIPS
- dsPIC33FJ12GP202-I/ML
- Microchip Technology
-
1:
$5.96
-
183In Stock
|
Mouser Part No
579-DSPICJ12GP202IML
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 212KB Flash 1024BRAM 40MIPS
|
|
183In Stock
|
|
|
$5.96
|
|
|
$5.47
|
|
|
$4.94
|
|
|
$4.92
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33FJ
|
1 Core
|
40 MHz
|
QFN-28
|
12 kB
|
1 kB
|
3 V to 3.6 V
|
dsPIC33FJ12GP202
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 64KB flash, 70MIPS, DSC optimized for digital power applications
- dsPIC33EP64GS502-I/2N
- Microchip Technology
-
1:
$7.74
-
183In Stock
|
Mouser Part No
579-33EP64GS502I2N
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 64KB flash, 70MIPS, DSC optimized for digital power applications
|
|
183In Stock
|
|
|
$7.74
|
|
|
$7.44
|
|
|
$7.07
|
|
|
$7.06
|
|
|
View
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
DSPs
|
dsPIC33E
|
1 Core
|
70 MHz
|
UQFN-28
|
64 kB
|
8 kB
|
3 V to 3.6 V
|
dsPIC33EP64GS502
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 64KB ECC Flash, 8KB RAM
- dsPIC33EV64GM106-E/PT
- Microchip Technology
-
1:
$7.21
-
149In Stock
|
Mouser Part No
579-33EV64GM106-E/PT
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 64KB ECC Flash, 8KB RAM
|
|
149In Stock
|
|
|
$7.21
|
|
|
$6.99
|
|
|
$6.64
|
|
|
$6.62
|
|
|
View
|
|
|
$6.61
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
TQFP-64
|
64 kB
|
8 kB
|
4.5 V to 5.5 V
|
dsPIC33EV64GM106
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tray
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 32KB Flash, 8KB RAM, 100MHz, 48Pin, 3 OpAmp, 3 Comp, PTG
- dsPIC33CK32MP205T-I/PT
- Microchip Technology
-
1:
$2.75
-
562In Stock
|
Mouser Part No
579-DSPIC33CK32205
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 32KB Flash, 8KB RAM, 100MHz, 48Pin, 3 OpAmp, 3 Comp, PTG
|
|
562In Stock
|
|
|
$2.75
|
|
|
$2.49
|
|
|
$2.27
|
|
|
$2.27
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
:
1,600
|
|
|
DSCs
|
dsPIC33CK
|
1 Core
|
100 MHz
|
TQFP-48
|
32 kB
|
8 kB
|
3 V to 3.6 V
|
dsPIC33CK32MP205
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Reel, Cut Tape
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33 100MHz Dual Core, 80-Pin, 256KB Flash
- dsPIC33CH256MP208-I/PT
- Microchip Technology
-
1:
$4.57
-
431In Stock
|
Mouser Part No
579-33CH256MP208IPT
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33 100MHz Dual Core, 80-Pin, 256KB Flash
|
|
431In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CH
|
2 Core
|
180 MHz, 200 MHz
|
TQFP-80
|
256 kB
|
16 kB, 32 kB
|
3 V to 3.6 V
|
dsPIC33CH256MP208
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tray
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 32KB ECC Flash, 4KB RAM, 60 MHz, 6 MC PWM, 3 Op Amps, CTMU, SENT
- dsPIC33EV32GM004-E/P8
- Microchip Technology
-
1:
$5.75
-
246In Stock
|
Mouser Part No
579-33EV32GM004-E/P8
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit 5V DSC 32KB ECC Flash, 4KB RAM, 60 MHz, 6 MC PWM, 3 Op Amps, CTMU, SENT
|
|
246In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33EV
|
1 Core
|
60 MHz
|
TQFP-48
|
32 kB
|
4 kB
|
5 V
|
dsPIC33EV32GM004
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tray
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 5V 32KB Flash, 4KB RAM
- dsPIC33EV32GM006-E/MR
- Microchip Technology
-
1:
$6.47
-
180In Stock
|
Mouser Part No
579-33EV32GM006-E/MR
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 5V 32KB Flash, 4KB RAM
|
|
180In Stock
|
|
|
$6.47
|
|
|
$6.07
|
|
|
$6.05
|
|
|
$6.04
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
60 MHz
|
QFN-64
|
32 kB
|
4 kB
|
4.5 V to 5.5 V
|
dsPIC33EV32GM006
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 28LD128KB DMA 40MIPS
- dsPIC33FJ128GP202-I/SP
- Microchip Technology
-
1:
$9.51
-
129In Stock
|
Mouser Part No
579-DSPIC128GP202ISP
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 28LD128KB DMA 40MIPS
|
|
129In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33FJ
|
|
40 MHz
|
SPDIP-28
|
128 kB
|
8 kB
|
|
dsPIC33FJ128GP202
|
dsPIC
|
Through Hole
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 28LD32KB Motor40 MIPS
- dsPIC33FJ32MC202T-I/MM
- Microchip Technology
-
1:
$6.96
-
300In Stock
|
Mouser Part No
579-DSPIC32MC202TIMM
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 28LD32KB Motor40 MIPS
|
|
300In Stock
|
|
|
$6.96
|
|
|
$6.36
|
|
|
$5.94
|
|
|
$5.93
|
|
|
View
|
|
|
$5.78
|
|
|
$5.78
|
|
|
$5.78
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
:
1,600
|
|
|
DSCs
|
dsPIC33FJ
|
|
40 MHz
|
QFN-S-28
|
32 kB
|
2 kB
|
|
dsPIC33FJ32MC202
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Reel, Cut Tape, MouseReel
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 5V 32KB Flash, 4KB RAM
- dsPIC33EV32GM004-I/PT
- Microchip Technology
-
1:
$5.13
-
261In Stock
|
Mouser Part No
579-33EV32GM004-I/PT
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 5V 32KB Flash, 4KB RAM
|
|
261In Stock
|
|
|
$5.13
|
|
|
$4.72
|
|
|
$4.71
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
TQFP-44
|
32 kB
|
4 kB
|
4.5 V to 5.5 V
|
dsPIC33EV32GM004
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tray
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 28LD 30MIPS 12 KB
- dsPIC30F2012-30I/SO
- Microchip Technology
-
1:
$6.31
-
189In Stock
|
Mouser Part No
579-DS30F201230ISO
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 28LD 30MIPS 12 KB
|
|
189In Stock
|
|
|
$6.31
|
|
|
$5.74
|
|
|
$5.55
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC30F
|
1 Core
|
30 MHz
|
SOIC-Wide-28
|
12 kB
|
1 kB
|
2.5 V to 5.5 V
|
dsPIC30F2012
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 28LD 20MIPS 24 KB
- dsPIC30F3010-20I/SO
- Microchip Technology
-
1:
$7.93
-
218In Stock
|
Mouser Part No
579-DS30F301020ISO
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 28LD 20MIPS 24 KB
|
|
218In Stock
|
|
|
$7.93
|
|
|
$7.90
|
|
|
$7.45
|
|
|
$7.19
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC30F
|
1 Core
|
40 MHz
|
SOIC-28
|
24 kB
|
1 kB
|
2.5 V to 5.5 V
|
dsPIC30F3010
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 28LD128KB
- dsPIC33FJ128MC802-E/SO
- Microchip Technology
-
1:
$10.66
-
105In Stock
|
Mouser Part No
579-DSPIC128MC802ESO
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 28LD128KB
|
|
105In Stock
|
|
|
$10.66
|
|
|
$9.78
|
|
|
$8.83
|
|
|
$8.81
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33FJ
|
1 Core
|
40 MHz
|
SOIC-28
|
128 kB
|
16 kB
|
3 V to 3.6 V
|
dsPIC33FJ128MC802
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16B 256KB FL 32KBR 60MHz 44P OpAmps
- dsPIC33EP256MC504-E/ML
- Microchip Technology
-
1:
$7.24
-
224In Stock
|
Mouser Part No
579-PC33256MC504EML
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16B 256KB FL 32KBR 60MHz 44P OpAmps
|
|
224In Stock
|
|
|
$7.24
|
|
|
$7.11
|
|
|
$6.99
|
|
|
$6.92
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
60 MHz
|
QFN-44
|
256 kB
|
32 kB
|
3 V to 3.6 V
|
dsPIC33EP256MC504
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16b MotC DSC,16 MIPS 32KB Flash, 2KB RAM
- dsPIC33FJ32MC101-I/SS
- Microchip Technology
-
1:
$4.26
-
331In Stock
|
Mouser Part No
579-PIC33FJ32MC101IS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16b MotC DSC,16 MIPS 32KB Flash, 2KB RAM
|
|
331In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33FJ
|
1 Core
|
16 MHz
|
SSOP-20
|
32 kB
|
2 kB
|
3 V to 3.6 V
|
dsPIC33FJ32MC101
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16-bit DSC 70 MIPS 64KBFlash 8KBRAM CAN
- dsPIC33EP64GS806-E/PT
- Microchip Technology
-
1:
$10.53
-
160In Stock
|
Mouser Part No
579-33EP64GS806EPT
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16-bit DSC 70 MIPS 64KBFlash 8KBRAM CAN
|
|
160In Stock
|
|
|
$10.53
|
|
|
$9.66
|
|
|
$8.74
|
|
Min.: 1
Mult.: 1
|
|
|
DSPs
|
dsPIC33E
|
1 Core
|
60 MHz
|
TQFP-64
|
64 kB
|
8 kB
|
3 V to 3.6 V
|
dsPIC33EP64GS806
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tray
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit MCU/DSP 64LD 40MIPS 128KB FLASH
- dsPIC33FJ128MC506A-I/MR
- Microchip Technology
-
1:
$10.62
-
174In Stock
|
Mouser Part No
579-33FJ128MC506AIMR
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit MCU/DSP 64LD 40MIPS 128KB FLASH
|
|
174In Stock
|
|
|
$10.62
|
|
|
$9.70
|
|
|
$9.68
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33FJ
|
1 Core
|
200 MHz
|
QFN-64
|
128 kB
|
8 kB
|
3 V to 3.6 V
|
dsPIC33FJ128MC506
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 44LD 16KB Flash40
- dsPIC33FJ16GP304-I/PT
- Microchip Technology
-
1:
$6.53
-
320In Stock
|
Mouser Part No
579-DSPICJ16GP304IPT
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16B DSC 44LD 16KB Flash40
|
|
320In Stock
|
|
|
$6.53
|
|
|
$6.20
|
|
|
$6.19
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33FJ
|
1 Core
|
40 MHz
|
TQFP-44
|
16 kB
|
2 kB
|
3 V to 3.6 V
|
dsPIC33FJ16GP304
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tray
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 64KB Fl 8KB RAM, MCPWM, QEI
- DSPIC33EP64MC204-I/MV
- Microchip Technology
-
1:
$4.96
-
280In Stock
|
Mouser Part No
579-33EP64MC204IMV
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 64KB Fl 8KB RAM, MCPWM, QEI
|
|
280In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
UQFN-48
|
64 kB
|
8 kB
|
3 V to 3.6 V
|
DSPIC33EP64MC204
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
Singapore