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74VHCT245A bảng dữ liệu(PDF) 1 Page - Fairchild Semiconductor

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Giải thích chi tiết về linh kiện  Octal Buffer/Line Driver with 3-STATE Outputs
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© 2005 Fairchild Semiconductor Corporation
DS500004
www.fairchildsemi.com
March 1997
Revised April 2005
74VHCT245A
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The VHCT245A is an advanced high speed CMOS octal
bus transceiver fabricated with silicon gate CMOS technol-
ogy. It achieves high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low
power dissipation. The VHCT245A is intended for bidirec-
tional asynchronous communication between data busses.
The direction of data transmission is determined by the
level of the T/R input. The enable input can be used to dis-
able the device so that the busses are effectively isolated.
Protection circuits ensure that 0V to 7V can be applied to
the input and output (Note 1) pins without regard to the
supply voltage. These circuits prevent device destruction
due to mismatched supply and input/output voltages. This
device can be used to interface 5V to 3V systems and two
supply systems such as battery back up.
Note 1: Outputs in OFF-State
Features
s High Speed: tPD 5.4 ns (typ) at VCC 5V
s Power Down Protection on Inputs and Outputs
s Low Power Dissipation: ICC 4 PA (Max) @ TA 25qC
s Pin and Function Compatible with 74HCT245
Ordering Code:
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Pb-Free package per JEDED J-STD-020B.
Logic Symbol
IEEE/IEC
Connection Diagram
Order Number
Package Number
Package Description
74VHCT245AM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74VHCT245ASJ
M20D
Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHCT245AMTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74VHCT245AN
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide


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