74lvth646 Fairchild Semiconductor, 74lvth646 Datasheet

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74lvth646

Manufacturer Part Number
74lvth646
Description
Low Voltage Octal Transceiver/register With 3-state Outputs
Manufacturer
Fairchild Semiconductor
Datasheet
© 2000 Fairchild Semiconductor Corporation
74LVTH646WM
74LVTH646MTC
74LVTH646
Low Voltage Octal Transceiver/Register
with 3-STATE Outputs
General Description
The LVTH646 consists of registered bus transceiver cir-
cuits, D-type flip-flops, and control circuitry providing multi-
plexed transmission of data directly from the input bus or
from the internal storage registers. Data on the A or B bus
will be loaded into the respective registers on the LOW-to-
HIGH transition of the appropriate clock pin (CPAB or
CPBA). (See Functional Description)
The LVTH646 data inputs include bushold, eliminating the
need for external pull-up resistors to hold unused inputs.
The bus transceivers are designed for low-voltage (3.3V)
V
interface to a 5V environment. The LVTH646 is fabricated
with an advanced BiCMOS technology to achieve high
speed operation similar to 5V ABT while maintaining low
power dissipation.
Ordering Code:
Devices also available in Tape and Reel. Specify by appending letter suffix “X” to the ordering code.
Logic Symbols
Order Number
CC
applications, but with the capability to provide a TTL
Package Number
MTC24
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
DS012017
Features
Input and output interface capability to systems at
5V V
Bushold data inputs eliminate the need for external
pull-up resistors to hold unused inputs
Live insertion/extraction permitted
Power Up/Down high impedance provides glitch-free
bus loading
Outputs source/sink 32 mA/ 64 mA
Functionally compatible with the 74 series 646
Latch-up performance exceeds 500 mA
Package Description
CC
IEEE/IEC
November 1999
Revised May 2000
www.fairchildsemi.com

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74lvth646 Summary of contents

Page 1

... M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide 74LVTH646MTC MTC24 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Devices also available in Tape and Reel. Specify by appending letter suffix “X” to the ordering code. ...

Page 2

Connection Diagram Truth Table (Note 1) Inputs OE DIR CPAB CPBA SAB SBA  ...

Page 3

Functional Description In the transceiver mode, data present at the HIGH impedance port may be stored in either the register or both. The select (SAB, SBA) controls can multiplex stored and real-time. The examples below demonstrate the ...

Page 4

Absolute Maximum Ratings Symbol Parameter V Supply Voltage Input Voltage Output Voltage Input Diode Current Output Diode Current Output Current Supply Current ...

Page 5

DC Electrical Characteristics Symbol Parameter V Input Clamp Diode Voltage IK V Input HIGH Voltage IH V Input LOW Voltage IL V Output HIGH Voltage OH V Output LOW Voltage OL I Bushold Input Minimum Drive I(HOLD) I Bushold Input ...

Page 6

AC Electrical Characteristics Symbol Parameter f Maximum Clock Frequency MAX t Propagation Delay Data to Output PLH t Clock PHL t Propagation Delay Data to Output PLH t Data PHL t Propagation ...

Page 7

Physical Dimensions inches (millimeters) unless otherwise noted 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Package Number M24B 7 www.fairchildsemi.com ...

Page 8

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves ...

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