|
|
ARM Microcontrollers - MCU PSoC 4 S-Series CapSense
- CY8C4125LQI-S433
- Infineon Technologies
-
1:
$5.55
-
5,763In Stock
|
Mouser Part No
727-CY8C4125LQI-S433
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC 4 S-Series CapSense
|
|
5,763In Stock
|
|
|
$5.55
|
|
|
$4.20
|
|
|
$3.64
|
|
|
$3.48
|
|
|
View
|
|
|
$3.20
|
|
|
$3.11
|
|
|
$3.06
|
|
|
$3.02
|
|
|
$2.84
|
|
Min.: 1
Mult.: 1
|
|
|
PSOC 4100
|
SMD/SMT
|
QFN-40
|
ARM Cortex M0+
|
32 kB
|
32 bit
|
10 bit, 12 bit
|
24 MHz
|
34 I/O
|
4 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU PSoC 4 S-Series
- CY8C4126AZI-S455
- Infineon Technologies
-
1:
$7.19
-
1,511In Stock
|
Mouser Part No
727-CY8C4126AZI-S455
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC 4 S-Series
|
|
1,511In Stock
|
|
|
$7.19
|
|
|
$5.48
|
|
|
$4.80
|
|
|
$4.46
|
|
|
View
|
|
|
$4.18
|
|
|
$4.01
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
PSOC 4100S Plus
|
SMD/SMT
|
TQFP-64
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
10 bit, 12 bit
|
24 MHz
|
54 I/O
|
8 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU PSoC 4 S-Series CapSense
- CY8C4146LQI-S423
- Infineon Technologies
-
1:
$5.39
-
4,385In Stock
|
Mouser Part No
727-CY8C4146LQI-S423
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC 4 S-Series CapSense
|
|
4,385In Stock
|
|
|
$5.39
|
|
|
$4.07
|
|
|
$3.54
|
|
|
$3.37
|
|
|
View
|
|
|
$3.10
|
|
|
$3.01
|
|
|
$2.95
|
|
|
$2.87
|
|
Min.: 1
Mult.: 1
|
|
|
PSOC 4100
|
SMD/SMT
|
QFN-40
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
10 bit, 12 bit
|
48 MHz
|
34 I/O
|
8 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU PSoC 4 S-Series
- CY8C4147AZI-S465
- Infineon Technologies
-
1:
$7.86
-
Non-Stocked Lead-Time 10 Weeks
|
Mouser Part No
727-CY8C4147AZI-S465
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC 4 S-Series
|
|
Non-Stocked Lead-Time 10 Weeks
|
|
|
$7.86
|
|
|
$6.01
|
|
|
$5.28
|
|
|
$4.91
|
|
|
View
|
|
|
$4.60
|
|
|
$4.31
|
|
|
$4.18
|
|
Min.: 1
Mult.: 1
|
|
|
PSOC 4100S Plus
|
SMD/SMT
|
TQFP-64
|
ARM Cortex M0+
|
128 kB
|
32 bit
|
10 bit, 12 bit
|
48 MHz
|
54 I/O
|
16 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU Cortex-M0+ 32KB FLASH 4KB SRAM
- ATSAMD20G15A-MU
- Microchip Technology
-
1:
$2.96
-
3,328In Stock
|
Mouser Part No
556-ATSAMD20G15A-MU
|
Microchip Technology
|
ARM Microcontrollers - MCU Cortex-M0+ 32KB FLASH 4KB SRAM
|
|
3,328In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
SAMD1/2x
|
SMD/SMT
|
QFN-48
|
ARM Cortex M0+
|
32 kB
|
32 bit
|
12 bit
|
48 MHz
|
38 I/O
|
4 kB
|
1.62 V
|
1.95 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU 32QFN,125C TEMP, GREEN, 3.3V, 48MHZ
- ATSAMD21E15B-MF
- Microchip Technology
-
1:
$3.35
-
2,718In Stock
|
Mouser Part No
556-ATSAMD21E15B-MF
|
Microchip Technology
|
ARM Microcontrollers - MCU 32QFN,125C TEMP, GREEN, 3.3V, 48MHZ
|
|
2,718In Stock
|
|
|
$3.35
|
|
|
$3.03
|
|
|
$2.76
|
|
|
$2.75
|
|
Min.: 1
Mult.: 1
|
|
|
SAMD21
|
SMD/SMT
|
QFN-32
|
ARM Cortex M0+
|
32 kB
|
32 bit
|
12 bit
|
48 MHz
|
26 I/O
|
4 kB
|
1.62 V
|
3.63 V
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tray
|
|
|
|
ARM Microcontrollers - MCU ARM Cortex M0+, 64K Flash, 8K SRAM with motor control Features in TQFP 48, 85C
- PIC32CM6408MC00048-I/Y8X
- Microchip Technology
-
1:
$4.15
-
633In Stock
|
Mouser Part No
579-408MC00048-I/Y8X
|
Microchip Technology
|
ARM Microcontrollers - MCU ARM Cortex M0+, 64K Flash, 8K SRAM with motor control Features in TQFP 48, 85C
|
|
633In Stock
|
|
|
$4.15
|
|
|
$3.81
|
|
|
$3.45
|
|
Min.: 1
Mult.: 1
|
|
|
|
SMD/SMT
|
TQFP-48
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
12 bit, 16 bit
|
48 MHz
|
38 I/O
|
8 kB
|
2.7 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU ARM Cortex M0+,128K Flash, 16K SRAM with motor control Features, QFN 48, 125C
- PIC32CM1216MC00048-E/U5B
- Microchip Technology
-
1:
$4.58
-
636In Stock
|
Mouser Part No
579-M1216MC00048EU5B
|
Microchip Technology
|
ARM Microcontrollers - MCU ARM Cortex M0+,128K Flash, 16K SRAM with motor control Features, QFN 48, 125C
|
|
636In Stock
|
|
|
$4.58
|
|
|
$4.50
|
|
|
$4.28
|
|
|
$4.23
|
|
|
View
|
|
|
$4.19
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
|
SMD/SMT
|
VQFN-48
|
ARM Cortex M0+
|
128 kB
|
32 bit
|
12 bit, 16 bit
|
48 MHz
|
38 I/O
|
16 kB
|
2.7 V
|
5.5 V
|
- 40 C
|
+ 125 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU PSoC4
- CY8C4024LQI-S413
- Infineon Technologies
-
1:
$4.38
-
2,747In Stock
|
Mouser Part No
727-CY8C4024LQI-S413
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC4
|
|
2,747In Stock
|
|
|
$4.38
|
|
|
$3.28
|
|
|
$2.84
|
|
|
$2.71
|
|
|
View
|
|
|
$2.48
|
|
|
$2.41
|
|
|
$2.26
|
|
|
$2.24
|
|
Min.: 1
Mult.: 1
|
|
|
PSOC 4000
|
SMD/SMT
|
QFN-40
|
ARM Cortex M0+
|
16 kB
|
32 bit
|
10 bit
|
24 MHz
|
34 I/O
|
2 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU PSoC4
- CY8C4025LQI-S411
- Infineon Technologies
-
1:
$4.07
-
5,414In Stock
|
Mouser Part No
727-CY8C4025LQI-S411
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC4
|
|
5,414In Stock
|
|
|
$4.07
|
|
|
$3.05
|
|
|
$2.62
|
|
|
$2.50
|
|
|
View
|
|
|
$2.28
|
|
|
$2.22
|
|
|
$2.14
|
|
|
$2.08
|
|
|
$1.93
|
|
Min.: 1
Mult.: 1
|
|
|
PSOC 4000
|
SMD/SMT
|
QFN-24
|
ARM Cortex M0+
|
32 kB
|
32 bit
|
10 bit
|
24 MHz
|
19 I/O
|
4 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M0+ MCU 192-Kbytes of Flash , 32 MHz CPU, USB
- STM32L072VZT6
- STMicroelectronics
-
1:
$10.38
-
546In Stock
|
Mouser Part No
511-STM32L072VZT6
|
STMicroelectronics
|
ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M0+ MCU 192-Kbytes of Flash , 32 MHz CPU, USB
|
|
546In Stock
|
|
|
$10.38
|
|
|
$7.48
|
|
|
$6.87
|
|
|
$6.24
|
|
|
View
|
|
|
$5.93
|
|
|
$5.32
|
|
|
$4.95
|
|
|
$4.90
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
|
|
|
STM32L072VZ
|
SMD/SMT
|
LQFP-100
|
ARM Cortex M0+
|
192 kB
|
32 bit
|
12 bit
|
32 MHz
|
84 I/O
|
20 kB
|
1.65 V
|
3.6 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU 32TQFP,85C TEMP, GREEN, 5V, 48MHZ, T&R
- ATSAMC21E16A-AUT
- Microchip Technology
-
1:
$4.20
-
1,912In Stock
|
Mouser Part No
556-ATSAMC21E16A-AUT
|
Microchip Technology
|
ARM Microcontrollers - MCU 32TQFP,85C TEMP, GREEN, 5V, 48MHZ, T&R
|
|
1,912In Stock
|
|
|
$4.20
|
|
|
$3.89
|
|
|
$3.63
|
|
|
$3.63
|
|
|
$3.62
|
|
Min.: 1
Mult.: 1
:
2,000
|
|
|
ATSAMC21
|
SMD/SMT
|
TQFP-32
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
2 x 12 bit
|
48 MHz
|
26 I/O
|
8 kB
|
2.7 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Reel, Cut Tape, MouseReel
|
|
|
|
ARM Microcontrollers - MCU 32TQFP 125C, GREEN,1.6-3.6V,48MHz
- ATSAMD21E17A-AF
- Microchip Technology
-
1:
$4.22
-
2,477In Stock
|
Mouser Part No
556-ATSAMD21E17A-AF
|
Microchip Technology
|
ARM Microcontrollers - MCU 32TQFP 125C, GREEN,1.6-3.6V,48MHz
|
|
2,477In Stock
|
|
|
$4.22
|
|
|
$3.64
|
|
|
$3.63
|
|
Min.: 1
Mult.: 1
|
|
|
SAMD21
|
SMD/SMT
|
TQFP-32
|
ARM Cortex M0+
|
128 kB
|
32 bit
|
12 bit
|
48 MHz
|
26 I/O
|
16 kB
|
1.62 V
|
3.63 V
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Tray
|
|
|
|
ARM Microcontrollers - MCU CM0,TQFP32, 128kFlash,T&R,USB, I Temp
- ATSAMD21E17D-AUT
- Microchip Technology
-
1:
$4.07
-
1,085In Stock
|
Mouser Part No
556-ATSAMD21E17D-AUT
|
Microchip Technology
|
ARM Microcontrollers - MCU CM0,TQFP32, 128kFlash,T&R,USB, I Temp
|
|
1,085In Stock
|
|
|
$4.07
|
|
|
$3.54
|
|
|
$3.54
|
|
|
$3.52
|
|
Min.: 1
Mult.: 1
:
2,000
|
|
|
SAMD21
|
SMD/SMT
|
TQFP-32
|
ARM Cortex M0+
|
128 kB
|
32 bit
|
12 bit
|
48 MHz
|
26 I/O
|
16 kB
|
1.62 V
|
3.63 V
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Reel, Cut Tape
|
|
|
|
ARM Microcontrollers - MCU 64kB Flash, 8kB SRAM, 2kB RWW, QFP, T&R
- ATSAMDA1E16B-ABT
- Microchip Technology
-
1:
$5.60
-
1,631In Stock
|
Mouser Part No
556-ATSAMDA1E16B-ABT
|
Microchip Technology
|
ARM Microcontrollers - MCU 64kB Flash, 8kB SRAM, 2kB RWW, QFP, T&R
|
|
1,631In Stock
|
|
|
$5.60
|
|
|
$5.41
|
|
|
$4.64
|
|
|
$4.64
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
:
2,000
|
|
|
SAM DA1
|
SMD/SMT
|
TQFP-32
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
12 bit
|
48 MHz
|
26 I/O
|
8 kB
|
2.7 V
|
3.63 V
|
- 40 C
|
+ 105 C
|
AEC-Q100
|
Reel, Cut Tape, MouseReel
|
|
|
|
ARM Microcontrollers - MCU ARM Cortex M0+, 64K Flash, 8K SRAM with motor control Features in QFN 48, 85C
- PIC32CM6408MC00048-I/U5B
- Microchip Technology
-
1:
$4.20
-
1,663In Stock
|
Mouser Part No
579-408MC00048-I/U5B
|
Microchip Technology
|
ARM Microcontrollers - MCU ARM Cortex M0+, 64K Flash, 8K SRAM with motor control Features in QFN 48, 85C
|
|
1,663In Stock
|
|
Min.: 1
Mult.: 1
|
|
|
|
SMD/SMT
|
VQFN-48
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
12 bit, 16 bit
|
48 MHz
|
38 I/O
|
8 kB
|
2.7 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU ARM Cortex M0+,128K Flash, 16K SRAM with motor control Features, TQFP 32, 125C
- PIC32CM1216MC00032-E/PT
- Microchip Technology
-
1:
$4.37
-
755In Stock
|
Mouser Part No
579-CM1216MC00032EPT
|
Microchip Technology
|
ARM Microcontrollers - MCU ARM Cortex M0+,128K Flash, 16K SRAM with motor control Features, TQFP 32, 125C
|
|
755In Stock
|
|
|
$4.37
|
|
|
$3.98
|
|
|
$3.63
|
|
|
$3.62
|
|
Min.: 1
Mult.: 1
|
|
|
|
SMD/SMT
|
TQFP-32
|
ARM Cortex M0+
|
128 kB
|
32 bit
|
12 bit, 16 bit
|
48 MHz
|
26 I/O
|
16 kB
|
2.7 V
|
5.5 V
|
- 40 C
|
+ 125 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU ARM Cortex-M0+ 32-bit 25 MHz 64 kB MCU
- EFM32HG110F64G-C-QFN24
- Silicon Labs
-
1:
$5.51
-
6,984In Stock
|
Mouser Part No
634-HG110F64GCQFN24
|
Silicon Labs
|
ARM Microcontrollers - MCU ARM Cortex-M0+ 32-bit 25 MHz 64 kB MCU
|
|
6,984In Stock
|
|
|
$5.51
|
|
|
$4.32
|
|
|
$3.96
|
|
|
$3.59
|
|
|
View
|
|
|
$3.40
|
|
|
$3.29
|
|
|
$3.17
|
|
|
$3.09
|
|
Min.: 1
Mult.: 1
|
|
|
EFM32HG
|
SMD/SMT
|
QFN-24
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
12 bit
|
25 MHz
|
17 I/O
|
8 kB
|
1.98 V
|
3.8 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU PSoC4
- CY8C4024LQI-S401
- Infineon Technologies
-
1:
$3.03
-
4,844In Stock
|
Mouser Part No
727-CY8C4024LQI-S401
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC4
|
|
4,844In Stock
|
|
|
$3.03
|
|
|
$2.07
|
|
|
$1.89
|
|
|
$1.73
|
|
|
View
|
|
|
$1.63
|
|
|
$1.52
|
|
|
$1.47
|
|
|
$1.46
|
|
Min.: 1
Mult.: 1
|
|
|
PSOC 4000
|
SMD/SMT
|
QFN-24
|
ARM Cortex M0+
|
16 kB
|
32 bit
|
10 bit
|
24 MHz
|
19 I/O
|
2 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU PSoC4
- CY8C4024LQI-S402
- Infineon Technologies
-
1:
$3.10
-
4,569In Stock
|
Mouser Part No
727-CY8C4024LQI-S402
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC4
|
|
4,569In Stock
|
|
|
$3.10
|
|
|
$2.30
|
|
|
$1.97
|
|
|
$1.88
|
|
|
View
|
|
|
$1.78
|
|
|
$1.65
|
|
|
$1.62
|
|
|
$1.60
|
|
|
$1.55
|
|
Min.: 1
Mult.: 1
|
|
|
PSOC 4000
|
SMD/SMT
|
QFN-32
|
ARM Cortex M0+
|
16 kB
|
32 bit
|
10 bit
|
24 MHz
|
27 I/O
|
2 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU PSoC4
- CY8C4025LQI-S402
- Infineon Technologies
-
1:
$3.59
-
4,805In Stock
|
Mouser Part No
727-CY8C4025LQI-S402
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC4
|
|
4,805In Stock
|
|
|
$3.59
|
|
|
$2.67
|
|
|
$2.30
|
|
|
$2.19
|
|
|
View
|
|
|
$2.11
|
|
|
$1.93
|
|
|
$1.85
|
|
Min.: 1
Mult.: 1
|
|
|
PSOC 4000
|
SMD/SMT
|
QFN-32
|
ARM Cortex M0+
|
32 kB
|
32 bit
|
10 bit
|
24 MHz
|
27 I/O
|
4 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Tray
|
|
|
|
ARM Microcontrollers - MCU PSoC4
- CY8C4146FNI-S433T
- Infineon Technologies
-
1:
$6.35
-
1,650In Stock
|
Mouser Part No
727-CY8C4146FNIS433T
|
Infineon Technologies
|
ARM Microcontrollers - MCU PSoC4
|
|
1,650In Stock
|
|
|
$6.35
|
|
|
$4.81
|
|
|
$4.20
|
|
|
$4.01
|
|
|
$3.50
|
|
|
View
|
|
|
$3.69
|
|
|
$3.66
|
|
|
$3.36
|
|
Min.: 1
Mult.: 1
:
2,000
|
|
|
PSOC 4100
|
SMD/SMT
|
WLCSP-35
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
10 bit, 12 bit
|
48 MHz
|
31 I/O
|
8 kB
|
1.71 V
|
5.5 V
|
- 40 C
|
+ 85 C
|
|
Reel, Cut Tape, MouseReel
|
|
|
|
ARM Microcontrollers - MCU 48QFN,125C TEMP, GREEN, 3.3V, 48MHZ, T&R
- ATSAMD21G16B-MFT
- Microchip Technology
-
1:
$4.18
-
6,367In Stock
|
Mouser Part No
556-ATSAMD21G16B-MFT
|
Microchip Technology
|
ARM Microcontrollers - MCU 48QFN,125C TEMP, GREEN, 3.3V, 48MHZ, T&R
|
|
6,367In Stock
|
|
|
$4.18
|
|
|
$4.04
|
|
|
$4.03
|
|
|
$3.74
|
|
|
$3.47
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
:
4,000
|
|
|
SAMD21
|
SMD/SMT
|
QFN-48
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
12 bit
|
48 MHz
|
38 I/O
|
8 kB
|
1.62 V
|
3.63 V
|
- 40 C
|
+ 125 C
|
AEC-Q100
|
Reel, Cut Tape, MouseReel
|
|
|
|
ARM Microcontrollers - MCU 128KB 16KB 48TQFP GRN1.6-3.6V48MHz
- ATSAMD21G17A-AUT
- Microchip Technology
-
1:
$4.12
-
914In Stock
|
Mouser Part No
556-ATSAMD21G17A-AUT
|
Microchip Technology
|
ARM Microcontrollers - MCU 128KB 16KB 48TQFP GRN1.6-3.6V48MHz
|
|
914In Stock
|
|
|
$4.12
|
|
|
$4.00
|
|
|
$3.88
|
|
|
$3.40
|
|
|
$3.40
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
:
2,500
|
|
|
SAMD21
|
SMD/SMT
|
TQFP-48
|
ARM Cortex M0+
|
128 kB
|
32 bit
|
12 bit
|
48 MHz
|
38 I/O
|
16 kB
|
1.62 V
|
3.63 V
|
- 40 C
|
+ 85 C
|
AEC-Q100
|
Reel, Cut Tape, MouseReel
|
|
|
|
ARM Microcontrollers - MCU 64kB Flash, 8kB SRAM, 2kB RWW, QFP, T&R
- ATSAMDA1J16B-ABT
- Microchip Technology
-
1:
$6.73
-
913In Stock
|
Mouser Part No
556-ATSAMDA1J16B-ABT
|
Microchip Technology
|
ARM Microcontrollers - MCU 64kB Flash, 8kB SRAM, 2kB RWW, QFP, T&R
|
|
913In Stock
|
|
|
$6.73
|
|
|
$6.51
|
|
|
$5.54
|
|
|
$5.54
|
|
|
Quote
|
|
|
Quote
|
|
Min.: 1
Mult.: 1
:
1,500
|
|
|
SAM DA1
|
SMD/SMT
|
TQFP-64
|
ARM Cortex M0+
|
64 kB
|
32 bit
|
12 bit
|
48 MHz
|
52 I/O
|
8 kB
|
2.7 V
|
3.63 V
|
- 40 C
|
+ 105 C
|
AEC-Q100
|
Reel, Cut Tape, MouseReel
|
|
Singapore