BASIC Stamp Comparison

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	Rev D. / BASIC Stamp 1 Module		BASIC Stamp 2e Module		BASIC Stamp 2p24 Module		BASIC Stamp 2pe Module
	BASIC Stamp 2 Module		BASIC Stamp 2sx Module		BASIC Stamp 2p40 Module		BASIC Stamp 2px Module

Released Products	Rev.D / BS1-IC	BS2-IC	BS2e-IC	BS2sx-IC	BS2p24-IC	BS2p40-IC	BS2pe-IC	BS2px-IC
Package	PCB w/Proto / 14-pin SIP	24-pin DIP	24-pin DIP	24-pin DIP	24-pin DIP	40-pin DIP	24-pin DIP	24-pin DIP
Package Size (L x W x H)	2.5"x1.5"x.5 / 1.4"x.6"x.1"	1.2"x0.6"x0.4"	1.2"x0.6"x0.4"	1.2"x0.6"x0.4"	1.2"x0.6"x0.4"	2.1"x0.6"x0.4"	1.2"x0.6"x0.4"	1.2"x0.60"x0.4"
Environment	-40 to +185 ^oF (-40 to +85 ^oC) ^**	-40 to +185 ^oF (-40 to +85 ^oC) ^**	-40 to +185 ^oF (-40 to +85 ^oC) ^**	-40 to +185 ^oF (-40 to +85 ^oC) ^**	-40 to +185 ^oF (-40 to +85 ^oC) ^**	+32 to +158 ^oF (0 to +70 ^oC) ^**	+32 to +158 ^oF (0 to +70 ^oC) ^**	+32 to +158 ^oF (0 to +70 ^oC) ^**
Processor Speed	4 MHz	20 MHz	20 MHz	50 MHz	20 MHz Turbo	20 MHz Turbo	8 MHz Turbo	32 MHz Turbo
Program Execution Speed	~2,000 instructions/sec.	~4,000 instructions/sec.	~4,000 instructions/sec.	~10,000 instuctions/sec.	~12,000 instructions/sec.	~12,000 instructions/sec.	~6,000 instructions/sec.	~19,000 instuctions/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)	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	N/A	N/A	64 Bytes	64 Bytes	128 Bytes	128 Bytes	128 Bytes	128 Bytes
EEPROM (Program) Size	256 Bytes, ~80 instructions	2K Bytes, ~500 instructions	8x2K Bytes, ~4,000 instructions	8x2K Bytes, ~4,000 instructions	8x2K Bytes, ~4,000 instructions	8x2K Bytes, ~4,000 instructions	16x2K Bytes (16K for source)	8 x 2k Bytes, ~4000 inst.
Number of I/O pins	8	16 +2 Dedicated Serial	16 +2 Dedicated Serial	16 +2 Dedicated Serial	16 +2 Dedicated Serial	32 +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	5 - 12 vdc	5 - 12 vdc	5 - 12 vdc	5 - 12 vdc
Current Draw @ 5V	1 mA Run / 25 µA Sleep	3 mA Run / 50 µA Sleep	25 mA Run / 200 µA Sleep	60 mA Run / 500 µA Sleep	40 mA Run / 350 µA Sleep	40 mA Run / 350 µA Sleep	15 mA Run / 36 µA Sleep	55 mA Run / 450 μA Sleep
Source / Sink Current per I/O	20 mA / 25 mA	20 mA / 25 mA	30 mA / 30 mA	30 mA / 30 mA	30 mA / 30 mA	30 mA / 30 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	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	32	42	45	45	61	61	61	63
PC Programming Interface	Serial (w/BS1 Serial Adapter)	Serial Port (9600 baud)	Serial Port (9600 baud)	Serial Port (9600 baud)	Serial Port (9600 baud)	Serial Port (9600 baud)	Serial Port (9600 baud)	Serial Port (19200 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)	Stampw.exe (v1.1 and up)	Stampw.exe (v1.1 and up)	Stampw.exe (v1.33 and up)	Stampw.exe (v2.2 and up)