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PDF ( 数据手册 , 数据表 ) 74VCX16501

零件编号 74VCX16501
描述 Low Voltage 18-Bit Universal Bus Transceivers with 3.6V Tolerant Inputs and Outputs
制造商 Fairchild Semiconductor
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74VCX16501 数据手册, 描述, 功能
March 1998
Revised April 1999
74VCX16501
Low Voltage 18-Bit Universal Bus Transceivers with 3.6V
Tolerant Inputs and Outputs
General Description
Features
The VCX16501 is an 18-bit universal bus transceiver which
combines D-type latches and D-type flip-flops to allow data
flow in transparent, latched, and clocked modes.
Data flow in each direction is controlled by output-enable
(OEAB and OEBA), latch-enable (LEAB and LEBA), and
s 1.65V–3.6V VCC supply operation
s 3.6V tolerant inputs and outputs
s tPD (A to B, B to A)
2.9 ns max for 3.0V to 3.6V VCC
clock (CLKAB and CLKBA) inputs. For A-to-B data flow, the
device operates in the transparent mode when LEAB is
HIGH. When LEAB is LOW, the A data is latched if CLKAB
is held at a HIGH or LOW logic level. If LEAB is LOW, the A
3.5 ns max for 2.3V to 2.7V VCC
7.0 ns max for 1.65V to 1.95V VCC
s Power-down high impedance inputs and outputs
bus data is stored in the latch/flip-flop on the LOW-to-HIGH
transition of CLKAB. When OEAB is HIGH, the outputs are
active. When OEAB is LOW, the outputs are in a high-
impedance state.
s Supports live insertion/withdrawal (Note 1)
s Static Drive (IOH/IOL)
±24 mA @ 3.0V VCC
Data flow for B to A is similar to that of A to B but uses
±18 mA @ 2.3V VCC
OEBA, LEBA, and CLKBA. The output enables are com-
plementary (OEAB is active HIGH and OEBA is active
LOW).
±6 mA @ 1.65V VCC
s Uses patented noise/EMI reduction circuitry
The VCX16501 is designed for low voltage (1.65V to 3.6V) s Latchup performance exceeds 300 mA
VCC applications with I/O capability up to 3.6V.
s ESD performance:
www.DataSheet4U.com
The VCX16501 is fabricated with an advanced CMOS
Human body model > 2000V
technology to achieve high speed operation while maintain-
ing low CMOS power dissipation.
Machine model >200V
Note 1: To ensure the high-impedance state during power up or power
down, OEBA should be tied to VCC through a pull-up resistor and OEAB
should be tied to GND through a pull-down resistor; the minimum value of
the resistors is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number Package Number
Package Description
74VCX16501MTD
MTD56
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
© 1999 Fairchild Semiconductor Corporation DS500125.prf
www.fairchildsemi.com







74VCX16501 pdf, 数据表
Physical Dimensions inches (millimeters) unless otherwise noted
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Package Number MTD56
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.














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