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74ALVC164245GRDR View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
74ALVC164245GRDR 16-Bit 2.5-V to 3.3-V or 3.3-V to 5-V Level-Shifting Transceiver With 3-State Outputs TI
Texas Instruments TI
74ALVC164245GRDR Datasheet PDF : 31 Pages
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SN74ALVC164245
SCAS416Q – MARCH 1994 – REVISED SEPTEMBER 2016
8 Detailed Description
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8.1 Overview
The SN74ALVC16245 device is designed for asynchronous communication between data buses. The control-
function implementation minimizes external timing requirements.
This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows data transmission from the
A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR)
input. The output-enable (OE) input can be used to disable the device so that the buses are effectively isolated.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in
a mixed 3.3-V and 5-V system environment.
8.2 Functional Block Diagram
1
1DIR
47
1A1
48
1OE
2
1B1
24
2DIR
36
2A1
25
2OE
13
2B1
To Seven Other Channels
To Seven Other Channels
Copyright © 2016, Texas Instruments Incorporated
Figure 6. Logic Diagram (Positive Logic)
8.3 Feature Description
The SN74ALVC164245 can output 24 mA drive at 3.3V VCC. This device allows down voltage translations and
accepts input voltages to VCC + 0.5V. This device is useful for high-speed applications because of the low tpd.
8.4 Device Functional Modes
Table 3 lists the functions of the device.
CONTROL INPUTS
OE
DIR
L
L
L
H
H
X
Table 3. Function Table(1)
(Each 8-Bit Section)
OUTPUT CIRCUITS
A PORT
B PORT
Enabled
Hi-Z
Hi-Z
Enabled
Hi-Z
Hi-Z
OPERATION
B data to A bus
A data to B bus
Isolation
(1) Input circuits of the data I/Os always are active.
16
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