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74LVCE161284DLRG4 Datasheet(PDF) 2 Page - Texas Instruments

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Part # 74LVCE161284DLRG4
Description  19-BIT IEEE STD 1284 TRANSLATION TRANSCEIVER WITH ERROR-FREE POWER UP
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

74LVCE161284DLRG4 Datasheet(HTML) 2 Page - Texas Instruments

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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
SN74LVCE161284
19-BIT IEEE STD 1284 TRANSLATION TRANSCEIVER
WITH ERROR-FREE POWER UP
SCES541 – JANUARY 2004 – REVISED MARCH 2005
The output drive mode is determined by the high-drive (HD) control pin. When HD is high, the outputs are in a
totem-pole configuration, and in an open-drain configuration when HD is low. This meets the drive requirements
as specified in the IEEE Std 1284-I (level-1 type) and IEEE Std 1284-II (level-2 type) parallel peripheral-interface
specifications. Except for HOST LOGIC IN and peripheral logic out (PERI LOGIC OUT), all cable-side pins have
a 1.4-k
Ω integrated pullup resistor. The pullup resistor is switched off if the associated output driver is in the low
state or if the output voltage is above VCC CABLE. If VCC CABLE is off, PERI LOGIC OUT is set to low.
The device has two supply voltages. VCC is designed for 3-V to 3.6-V operation. VCC CABLE supplies the inputs
and output buffers of the cable side only and is designed for 3-V to 3.6-V and for 4.7-V to 5.5-V operation. Even
when VCC CABLE is 3 V to 3.6 V, the cable-side I/O pins are 5-V tolerant.
The Y outputs (Y9–Y13) stay in the high state after power on until an associated input (A9–A13) goes high.
When an associated input goes high, all Y outputs are activated, and noninverting signals of the associated
inputs are driven through Y outputs. This special feature prevents printer-system errors caused by deasserting
the BUSY signal in the cable at power on.
FUNCTION TABLE
INPUTS
OUTPUT
MODE
DIR
HD
Open drain
A9–A13 to Y9–Y13 and PERI LOGIC IN to PERI LOGIC OUT
L
L
Totem pole
B1–B8 to A1–A8 and C14–C17 to A14–A17
L
H
Totem pole
B1–B8 to A1–A8, A9–A13 to Y9–Y13, PERI LOGIC IN to PERI LOGIC OUT, and C14–C17 to A14–A17
Open drain
A1–A8 to B1–B8, A9–A13 to Y9–Y13, and PERI LOGIC IN to PERI LOGIC OUT
H
L
Totem pole
C14–C17 to A14–A17
H
H
Totem pole
A1–A8 to B1–B8, A9–A13 to Y9–Y13, C14–C17 to A14–A17, and PERI LOGIC IN to PERI LOGIC OUT
2


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