Confidential
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,
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 0.5 ∝ s 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.
2.1.2.4Electrical Characteristics
DC Characteristics (Except
Characteristics |
| Symbol | Specifications |
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| Conditions |
| Min | Max | ||||
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Output HIGH voltage |
| VOH | *2.4 V | 5.5 V | *IOH=0.32 mA | |
Output LOW voltage |
| VOL | *0.4 V | |||
Output HIGH current |
| IOH | 0.32 mA | - |
| VOH=2.4 V |
Output LOW current |
| IOL | - |
| VOL=0.4 V | |
Input HIGH voltage |
| VIH | 2.0 V | - |
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Input LOW voltage |
| VIL | - | 0.8 V |
| |
Input HIGH current |
| IIH | - | VIH=2.0 V | ||
Input LOW current |
| IIL | - | 12 mA | VIL=0.8 V | |
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Characteristics |
| Symbol | Specifications |
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| Conditions |
| Min | Max | ||||
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Output HIGH voltage |
| VOH | 3.0 V | 5.5 | V |
|
Output LOW voltage |
| VOL | - | 2.0 | V | While the power is OFF |
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| +5 V Signal Sender Characteristics |
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Characteristics |
| Symbol | Specifications |
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| Conditions |
| Min | Max | ||||
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Output HIGH voltage |
| VOH | *2.4 V | 5.5 | V | *IOH=0.32 mA |
Output LOW voltage |
| VOL | - | - ** | While the power is OFF | |
Output HIGH current |
| IOH | - | 0.32 mA | VOH=2.4 V | |
Output LOW current |
| IOL | - ** | - |
| While the power is OFF |
** No guarantee is offered to VOL and IOL while the power is OFF.
TITLE
TM-T88III series
SHEET | NO. |
REVISION |
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EPSON Specification (STANDARD)
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