|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 64K Flash, 16K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
- dsPIC33AK64MC102-I/SS
- Microchip Technology
-
1:
$2.39
-
943In Stock
-
New Product
|
Mouser Part No
579-33AK64MC102ISS
New Product
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 64K Flash, 16K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
|
|
943In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
Single-Core Digital Signal Controllers
|
dsPIC33AK
|
1 Core
|
64 MHz
|
SSOP-28
|
64 kB
|
16 kB
|
2 kB
|
3 V to 3.6 V
|
dsPIC33A
|
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 32K Flash, 8K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
- dsPIC33AK32MC102-E/SS
- Microchip Technology
-
1:
$2.53
-
331In Stock
-
New Product
|
Mouser Part No
579-33AK32MC102ESS
New Product
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 32K Flash, 8K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
|
|
331In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
Single-Core Digital Signal Controllers
|
dsPIC33AK
|
1 Core
|
200 MHz
|
SSOP-28
|
32 kB
|
8 kB
|
2 kB
|
3 V to 3.6 V
|
dsPIC33A
|
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 32K Flash, 8K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
- dsPIC33AK32MC102-I/SS
- Microchip Technology
-
1:
$2.30
-
483In Stock
-
New Product
|
Mouser Part No
579-33AK32MC102ISS
New Product
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 32K Flash, 8K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
|
|
483In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
Single-Core Digital Signal Controllers
|
dsPIC33AK
|
1 Core
|
200 MHz
|
SSOP-28
|
32 kB
|
8 kB
|
2 kB
|
3 V to 3.6 V
|
dsPIC33A
|
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 64K Flash, 16K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
- dsPIC33AK64MC102-E/SS
- Microchip Technology
-
1:
$2.64
-
266In Stock
-
New Product
|
Mouser Part No
579-33AK64MC102ESS
New Product
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 64K Flash, 16K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
|
|
266In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
Single-Core Digital Signal Controllers
|
dsPIC33AK
|
1 Core
|
64 MHz
|
SSOP-28
|
64 kB
|
16 kB
|
2 kB
|
3 V to 3.6 V
|
dsPIC33A
|
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 128K Flash, 16K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
- dsPIC33AK128MC102-E/SS
- Microchip Technology
-
1:
$2.77
-
239In Stock
|
Mouser Part No
579-128MC102-E/SS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 128K Flash, 16K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
|
|
239In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSPs
|
dsPIC333
|
1 Core
|
200 MHz
|
SSOP-28
|
128 kB
|
16 kB
|
2 kB
|
3 V to 3.6 V
|
|
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 128K Flash, 16K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
- dsPIC33AK128MC102-I/SS
- Microchip Technology
-
1:
$2.52
-
727In Stock
|
Mouser Part No
579-128MC102-I/SS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33A, FPU, 200MHz, 128K Flash, 16K RAM, MC-PWM, 12-bit ADCs, Op Amps, Comp.
|
|
727In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSPs
|
dsPIC333
|
1 Core
|
200 MHz
|
SSOP-28
|
128 kB
|
16 kB
|
2 kB
|
3 V to 3.6 V
|
|
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 32K Flash, 8K RAM, OpAmps, 12bit ADCs, PWM
- DSPIC33CK32MC102-I/SS
- Microchip Technology
-
1:
$1.70
-
5,883In Stock
|
Mouser Part No
579-33CK32MC102-I/SS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 32K Flash, 8K RAM, OpAmps, 12bit ADCs, PWM
|
|
5,883In Stock
|
|
|
$1.70
|
|
|
$1.55
|
|
|
$1.44
|
|
|
$1.41
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CK
|
1 Core
|
100 MHz
|
SSOP-28
|
32 kB
|
8 kB
|
|
3 V to 3.6 V
|
DSPIC33CK32MC102
|
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 32KB Flash 4KB RAM 60 MHz 28pin
- dsPIC33EP32GP502T-I/SS
- Microchip Technology
-
1:
$3.36
-
3,270In Stock
|
Mouser Part No
579-P33EP32GP502TISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 32KB Flash 4KB RAM 60 MHz 28pin
|
|
3,270In Stock
|
|
|
$3.36
|
|
|
$3.36
|
|
|
$3.28
|
|
Min.: 1
Mult.: 1
:
2,100
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
60 MHz
|
SSOP-28
|
32 kB
|
4 kB
|
|
3 V to 3.6 V
|
dsPIC33EP32GP502
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Reel, Cut Tape
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33 100MHz Dual Core, CAN, 28-Pin 128KB Flash
- dsPIC33CH128MP502-I/SS
- Microchip Technology
-
1:
$3.20
-
108In Stock
|
Mouser Part No
579-33CH128MP502ISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33 100MHz Dual Core, CAN, 28-Pin 128KB Flash
|
|
108In Stock
|
|
|
$3.20
|
|
|
$2.91
|
|
|
$2.64
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CH
|
2 Core
|
180 MHz, 200 MHz
|
SSOP-28
|
24 kB, 128 kB
|
4 kB, 16 kB
|
|
3 V to 3.6 V
|
dsPIC33CH128MP502
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 32K Flash, 8K RAM, OpAmps, 12bit ADCs, PWM
- DSPIC33CK32MC102-E/SS
- Microchip Technology
-
1:
$1.88
-
480In Stock
|
Mouser Part No
579-33CK32MC102-E/SS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 32K Flash, 8K RAM, OpAmps, 12bit ADCs, PWM
|
|
480In Stock
|
|
|
$1.88
|
|
|
$1.70
|
|
|
$1.69
|
|
|
$1.55
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CK
|
1 Core
|
100 MHz
|
SSOP-28
|
32 kB
|
8 kB
|
|
3 V to 3.6 V
|
DSPIC33CK32MC102
|
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 16KB Flash 70MIPS for power ap
- dsPIC33EP16GS202-E/SS
- Microchip Technology
-
1:
$5.36
-
5In Stock
|
Mouser Part No
579-33EP16GS202-E/SS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 16KB Flash 70MIPS for power ap
|
|
5In Stock
|
|
|
$5.36
|
|
|
$4.90
|
|
|
$4.43
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
60 MHz
|
SSOP-28
|
16 kB
|
2 kB
|
|
3.3 V
|
dsPIC33EP16GS202
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC 256KB FL 16KB RAM, 60 MHz
- dsPIC33EV256GM002-I/SS
- Microchip Technology
-
1:
$6.15
-
293In Stock
|
Mouser Part No
579-33EV256GM002ISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC 256KB FL 16KB RAM, 60 MHz
|
|
293In Stock
|
|
|
$6.15
|
|
|
$5.97
|
|
|
$5.83
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
SSOP-28
|
256 kB
|
16 kB
|
|
4.5 V to 5.5 V
|
dsPIC33EV256GM002
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC 256KB FL 16KB RAM, 60 MHz
- dsPIC33EV256GM102-I/SS
- Microchip Technology
-
1:
$6.50
-
124In Stock
|
Mouser Part No
579-33EV256GM102ISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC 256KB FL 16KB RAM, 60 MHz
|
|
124In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
SSOP-28
|
256 kB
|
16 kB
|
|
4.5 V to 5.5 V
|
dsPIC33EV256GM102
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC 32KB FL 4KB RAM, 60 MHz
- dsPIC33EV32GM102-E/SS
- Microchip Technology
-
1:
$5.59
-
165In Stock
|
Mouser Part No
579-33EV32GM102ESS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC 32KB FL 4KB RAM, 60 MHz
|
|
165In Stock
|
|
|
$5.59
|
|
|
$5.11
|
|
|
$4.65
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
60 MHz
|
SSOP-28
|
32 kB
|
4 kB
|
|
4.5 V to 5.5 V
|
dsPIC33EV32GM102
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 64K Flash, 8K RAM, OpAmps, 12bit ADCs, PWM
- DSPIC33CK64MC102-E/SS
- Microchip Technology
-
1:
$1.94
-
386In Stock
|
Mouser Part No
579-3CK64MC102-E/SS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 64K Flash, 8K RAM, OpAmps, 12bit ADCs, PWM
|
|
386In Stock
|
|
|
$1.94
|
|
|
$1.77
|
|
|
$1.60
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CK
|
1 Core
|
100 MHz
|
SSOP-28
|
64 kB
|
8 kB
|
|
3 V to 3.6 V
|
DSPIC33CK64MC102
|
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 256KB Flsh 32KB RAM 60MHz 28pi
- dsPIC33EP256MC502-E/SS
- Microchip Technology
-
1:
$6.70
-
231In Stock
|
Mouser Part No
579-P33EP256MC502ESS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 256KB Flsh 32KB RAM 60MHz 28pi
|
|
231In Stock
|
|
|
$6.70
|
|
|
$6.68
|
|
|
$5.58
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
60 MHz
|
SSOP-28
|
256 kB
|
32 kB
|
|
3 V to 3.6 V
|
dsPIC33EP256MC502
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 256KB Flsh 32KB RAM 60MHz 28pin
- dsPIC33EP256MC502-I/SS
- Microchip Technology
-
1:
$6.09
-
95In Stock
-
188Expected 11/9/2026
|
Mouser Part No
579-P33EP256MC502ISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 256KB Flsh 32KB RAM 60MHz 28pin
|
|
95In Stock
188Expected 11/9/2026
|
|
|
$6.09
|
|
|
$5.59
|
|
|
$5.07
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
60 MHz
|
SSOP-28
|
256 kB
|
32 kB
|
|
3 V to 3.6 V
|
dsPIC33EP256MC502
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 128K Dual Panel Flash, 16K RAM, OpAmps, 12bit ADCs, PWM
- dsPIC33CK128MP202-E/SS
- Microchip Technology
-
1:
$2.99
-
204In Stock
|
Mouser Part No
579-PIC33CK128MP202E
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 128K Dual Panel Flash, 16K RAM, OpAmps, 12bit ADCs, PWM
|
|
204In Stock
|
|
|
$2.99
|
|
|
$2.72
|
|
|
$2.48
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CK
|
1 Core
|
100 MHz
|
SSOP-28
|
128 kB
|
16 kB
|
|
3 V to 3.6 V
|
dsPIC33CK128MP202
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 256K Dual Panel Flash, 24K RAM, CAN-FD, OpAmps, 12bit ADCs, PWM
- dsPIC33CK256MP502-I/SS
- Microchip Technology
-
1:
$2.83
-
336In Stock
|
Mouser Part No
579-PIC33CK256MP502I
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33C 100MHz, 256K Dual Panel Flash, 24K RAM, CAN-FD, OpAmps, 12bit ADCs, PWM
|
|
336In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CK
|
1 Core
|
100 MHz
|
SSOP-28
|
256 kB
|
24 kB
|
|
3 V to 3.6 V
|
dsPIC33CK256MP502
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33 100MHz Dual Core 28-Pin 128KB Flash
- dsPIC33CH128MP202-E/SS
- Microchip Technology
-
1:
$3.39
-
128In Stock
|
Mouser Part No
579-33CH128MP202ESS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33 100MHz Dual Core 28-Pin 128KB Flash
|
|
128In Stock
|
|
|
$3.39
|
|
|
$3.32
|
|
|
$3.30
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CH
|
2 Core
|
180 MHz, 200 MHz
|
SSOP-28
|
24 kB, 128 kB
|
4 kB, 16 kB
|
|
3 V to 3.6 V
|
dsPIC33CH128MP202
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33 100MHz Dual Core, 28-Pin 128KB Flash
- dsPIC33CH128MP202-I/SS
- Microchip Technology
-
1:
$3.07
-
63In Stock
|
Mouser Part No
579-33CH128MP202ISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC dsPIC33 100MHz Dual Core, 28-Pin 128KB Flash
|
|
63In Stock
|
|
|
$3.07
|
|
|
$2.79
|
|
|
$2.54
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33CH
|
2 Core
|
180 MHz, 200 MHz
|
SSOP-28
|
24 kB, 128 kB
|
4 kB, 16 kB
|
|
3 V to 3.6 V
|
dsPIC33CH128MP202
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 256KB Flsh 32KB RAM 60MHz 28pin
- dsPIC33EP256GP502-I/SS
- Microchip Technology
-
1:
$6.09
-
120In Stock
|
Mouser Part No
579-P33EP256GP502ISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 256KB Flsh 32KB RAM 60MHz 28pin
|
|
120In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
60 MHz
|
SSOP-28
|
256 kB
|
32 kB
|
|
3 V to 3.6 V
|
dsPIC33EP256GP502
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 32KB Flash 4KB RAM 60 MHz 28pin
- dsPIC33EP32MC202-I/SS
- Microchip Technology
-
1:
$2.84
-
653In Stock
|
Mouser Part No
579-PC33EP32MC202ISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16Bit DSC 32KB Flash 4KB RAM 60 MHz 28pin
|
|
653In Stock
|
|
|
$2.84
|
|
|
$2.57
|
|
|
$2.33
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
SSOP-28
|
32 kB
|
4 kB
|
|
3 V to 3.6 V
|
dsPIC33EP32MC202
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 64KB Flash 8KB RAM 60 MHz
- DSPIC33EP64GP502-I/SS
- Microchip Technology
-
1:
$4.72
-
56In Stock
|
Mouser Part No
579-PC33EP64GP502ISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 64KB Flash 8KB RAM 60 MHz
|
|
56In Stock
|
|
|
$4.72
|
|
|
$4.32
|
|
|
$3.93
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
60 MHz
|
SSOP-28
|
64 kB
|
8 kB
|
|
3 V to 3.6 V
|
DSPIC33EP64GP502
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
|
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 64KB Flash 8KB RAM 60 MHz
- dsPIC33EP64MC202-I/SS
- Microchip Technology
-
1:
$4.18
-
231In Stock
|
Mouser Part No
579-PC33EP64MC202ISS
|
Microchip Technology
|
Digital Signal Processors & Controllers - DSP, DSC 16 Bit DSC, 64KB Flash 8KB RAM 60 MHz
|
|
231In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
DSCs
|
dsPIC33E
|
1 Core
|
70 MHz
|
SSOP-28
|
64 kB
|
8 kB
|
|
3 V to 3.6 V
|
dsPIC33EP64MC202
|
dsPIC
|
SMD/SMT
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Tube
|
|
Singapore