Specifications

Confidential
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18
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REVISION
H
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19
TM-U590 series
Specification
(STANDARD)
NOTES: 1. A prefix “n” to signal names refers to “L” active signals. To the host provided with none
of the signal lines listed above, both-way communication fails.
2. For interfacing, signal lines shall use twisted pair cables with the return sides
connected to signal ground level.
3. Interfacing conditions shall be all based on the TTL level to meet the characteristics
described below. In addition, both rise time and fall time of each signal shall be
0.5µs or less.
4. Data transmission shall not ignore the signal nAck or Busy. An attempt to transmit
data with either signal, nAck or Busy, ignored can cause lost data. (Data
transmissions to the printer shall be made after verifying the nAck signal or while the
Busy signal is at the “L” level.)
5. Interface cables shall be as minimum required short in length as possible.
2.1.2.4 Electrical Characteristics
DC Characteristics (Except Logic-H, +5 V signals)
Specifications
Characteristics Symbol
Min Max
Conditions
Output HIGH voltage V
OH
*2.4 V 5.5 V *I
OH
=0.32 mA
Output LOW voltage V
OL
-0.5 V *0.4 V *I
OL
=-12 mA
Output HIGH current I
OH
0.32 mA - V
OH
=0.32 V
Output LOW current I
OL
-12 mA - V
OL
=0.4 V
Input HIGH voltage V
IH
2.0 V -
Input LOW voltage V
IL
- 0.8 V
Input HIGH current I
IH
- -0.32 mA V
IH
=2.0 V
Input LOW current I
IL
- 12 mA V
IL
=0.8 V
Logic-H Signal Sender Characteristics
Specifications
Characteristics Symbol
Min Max
Conditions
Output HIGH voltage V
OH
3.0 V 5.5 V
Output LOW voltage V
OL
- 2.0 V While the power is OFF