Motorola MVME2600 manual Interface Characteristics

	EIA-232-D Connections
Interface Characteristics	B

The EIA-232-D interface standard specifies all parameters for serial binary data interchange between DTE and DCE devices using unbalanced lines. EIA-232-D transmitter and receiver parameters applicable to the MVME2603/2604 are listed in the following tables.

Table B-2. EIA-232-D Interface Transmitter Characteristics

Parameter	Value		Unit
	Minimum Maximum
Output voltage (with load resistance of 3000Ω to	±8.5		V
7000Ω)
Open circuit output voltage		± 12	V
Short circuit output current (to ground or any other		± 100	mA
interconnection cable conductor)
Power-off output resistance	300		W
Output transition time (for a transition region of		2	μs
–3V to +3V and with total load capacitance,
including connection cable, of less than 2500pF)
Open circuit slew rate		30	V/μs

The MVME2603/2604 conforms to EIA-232-D specifications. Note that although the EIA-232-D standard recommends the use of short interconnection cables not more than 50 feet (15 m) in length, longer cables are permissible provided the total load capacitance measured at the interface point and including signal terminator does not exceed 2500pF.

Table B-3. EIA-232-D Interface Receiver Characteristics

Parameter	Value		Unit
	Minimum	Maximum
Input signal voltage		±25	V
Input high threshold voltage		2.25	V
Input low threshold voltage	0.75		V
Input hysteresis	1.0		V
Input impedance (−15V < Vin < +15V)	3000	7000	Ω

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