Stamp Specifications (revised 02/10)
Released Products Rev.Dx / BS1-IC BS2-IC BS2e-IC BS2sx-IC
Package PCB w/Proto / 14-pin SIP 24-pin DIP 24-pin DIP 24-pin DIP
Package Size (L x W x H) 2.5" x 1.5" x .5" / 1.4" x .6" x .1" 1.2" x 0.6" x 0.4" 1.2" x 0.6" x 0.4" 1.2" x 0.6" x 0.4"
Environment * -40 to + 85 C (-40 to + 185 F) ** -40 to + 85 C (-40 to + 185 F) ** -40 to + 85 C (-40 to + 185 F) ** -40 to + 85 C (-40 to + 185 F) **
Microcontroller Microchip PIC'56 Microchip PIC'57 Parallax SX28 Parallax SX28
Processor Speed 4 MHz 20 MHz 20 MHz 50 MHz
Program Execution Speed ~2,000 instructions/sec. ~4,000 instructions/sec. ~4,000 instructions/sec. ~10,000 instructions/sec.
RAM Size 16 Bytes (2 I/O, 14 Variable) 32 Bytes (6 I/O, 26 Variable) 32 Bytes (6 I/O, 26 Variable) 32 Bytes (6 I/O, 26 Variable)
Scratch Pad RAM N/A N/A 64 Bytes 64 Bytes
EEPROM (Program) Size 256 Bytes, ~80 instructions 2K Bytes, ~500 instructions 8 x 2K Bytes, ~4,000 inst. 8 x 2K Bytes, ~4,000 inst.
Number of I/O pins 8 16 + 2 Dedicated Serial 16 + 2 Dedicated Serial 16 + 2 Dedicated Serial
Voltage Requirements 5 - 15 vdc 5 - 15 vdc 5 - 12 vdc 5 - 12 vdc
Current Draw @ 5V 1 mA Run / 25 A Sleep 3 mA Run / 50 A Sleep 25 mA Run / 200 A Sleep 60 mA Run / 500 A Sleep
Source / Sink Current per I/O 20 mA / 25 mA 20 mA / 25 mA 30 mA / 30 mA 30 mA / 30 mA
Source / Sink Current per unit 40 mA / 50 mA 40 mA / 50 mA per 8 I/O pins 60 mA / 60 mA per 8 I/O pins 60 mA / 60 mA per 8 I/O pins
PBASIC Commands*** 32 42 45 45
PC Programming Interface Serial (w/BS1 Serial Adapter) Serial (9600 baud) Serial (9600 baud) Serial (9600 baud)
Windows Text Editor Stampw.exe (v2.1 and up) Stampw.exe (v1.04 and up) Stampw.exe (v1.096 and up) Stampw.exe (v1.091 and up)
Released Products BS2p24-IC BS2p40-IC BS2pe-IC BS2px-IC
Package 24-pin DIP 40-pin DIP 24-pin DIP 24-pin DIP
Package Size (L x W x H) 1.2" x 0.6" x 0.4" 2.1" x 0.6" x 0.4" 1.2" x 0.6" x 0.4" 1.2" x 0.6" x 0.4"
Environment * -40 to + 85 C (-40 to + 185 F) ** 0 - 70 C (32 - 158 F) ** 0 - 70 C (32 - 158 F) ** 0 - 70 C (32 - 158 F) **
Microcontroller Parallax SX48 Parallax SX48 Parallax SX48 Parallax SX48
Processor Speed 20 MHz Turbo 20 MHz Turbo 8 MHz Turbo 32 MHz Turbo
Program Execution Speed ~12,000 instructions/sec. ~12,000 instructions/sec. ~6000/sec. ~19,000 instructions/sec.
RAM Size 38 Bytes (12 I/O, 26 Variable) 38 Bytes (12 I/O, 26 Variable) 38 Bytes (12 I/O, 26 Variable) 38 Bytes (12 I/O, 26 Variable)
Scratch Pad RAM 128 Bytes 128 Bytes 128 Bytes 128 Bytes
EEPROM (Program) Size 8 x 2K Bytes, ~4,000 inst. 8 x 2K Bytes, ~4,000 inst. 16 x 2K Bytes (16 K for source) 8 x 2K Bytes, ~4,000 inst.
Number of I/O pins 16 + 2 Dedicated Serial 32 + 2 Dedicated Serial 16 + 2 Dedicated Serial 16 + 2 Dedicated Serial
Voltage Requirements 5 - 12 vdc 5 - 12 vdc 5 - 12 vdc 5 - 12 vdc
Current Draw @ 5V 40 mA Run / 350 A Sleep 40 mA Run / 350 A Sleep 15 mA Run / 150 A Sleep 55 mA Run / 450 A Sleep
Source / Sink Current per I/O 30 mA / 30 mA 30 mA / 30 mA 30 mA / 30 mA 30 mA / 30 mA
Source / Sink Current per unit 60 mA / 60 mA per 8 I/O pins 60 mA / 60 mA per 8 I/O pins 60 mA / 60 mA per 8 I/O pins 60 mA / 60 mA per 8 I/O pins
PBASIC Commands*** 61 61 61 63
PC Programming Interface Serial (9600 baud) Serial (9600 baud) Serial (9600 baud) Serial (19200 baud)
Windows Text Editor Stampw.exe (v1.1 and up) Stampw.exe (v1.1 and up) Stampw.exe (v1.33 and up) Stampw.exe (v2.2 and up)
* 70% Non-Condensing Humidity
** Environment ratings may change with future hardware revisions; please contact support@parallax.com for more information.
*** Using PBASIC 2.5 for BS2-type models.