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L
TM-U210 series
Specification
(STANDARD)
1819
NOTES: 1. A prefix “n” to signal names refers to “L” active signals. To the host not provided
with all 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 signals 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 the minimum length required and as short in length as
possible.
*NC: Not Connected
ND: Not Defined
2.1.2.5 Electrical Characteristics
DC Characteristics (Except Logic-H, +5 V signals)
Specifications
Characteristics Symbol
Min Max
Conditions
Output HIGH voltage VOH *2.4 V 5.5 V *IOH=0.32 mA
Output LOW voltage VOL -0.5 V *0.4 V *IOL=-12 mA
Output HIGH current IOH 0.32 V - VOH=0.32 V
Output LOW current IOL -12 V - VOL=0.4 V
Input HIGH voltage VIH 2.0 V -
Input LOW voltage VIL - 0.8 V
Input HIGH current VIH - -0.32 mA VIH=2.0 V
Input LOW current VIL - 12 mA VIL=0.8 V
Logic-H Signal Sender Characteristics
Specifications
Characteristics Symbol
Min Max
Conditions
Output HIGH voltage VOH 3.0 V 5.5 V
Output LOW voltage VOL - 2.0 V While the power is OFF