74LCX652 Low Voltage Transceiver/Register with 5V Tolerant Inputs and Outputs
February 1994
Revised April 1999
74LCX652
Low Voltage Transceiver/Register with 5V Tolerant
Inputs and Outputs
General Description
The LCX652 consists of bus transceiver circuits with D-
type flip-flops, and control circuitry arranged for multiplexed
transmission of data directly from the input bus or from
internal registers. Data on the A or B bus will be clocked
into the registers as the appropriate clock pin goes to the
HIGH logic level. Output Enable pins (OEAB, OEBA) are
provided to control the transceiver function.
The LCX652 is designed for low voltage (2.5V or 3.3V) V
CC
applications with capability of interfacing to a 5V signal
environment.
The LCX652 is fabricated with an advanced CMOS tech-
nology to achieve high speed operation while maintaining
CMOS low power dissipation.
Features
s
5V tolerant inputs and outputs
s
2.3V
鈭?/div>
3.6V V
CC
specifications provided
s
7.0 ns t
PD
max (V
CC
=
3.3V), 10
碌A
I
CC
max
s
Power down high impedance inputs and outputs
s
Supports live insertion/withdrawal (Note 1)
s
卤24
mA output drive (V
CC
=
3.0V)
s
Implements patented noise/EMI reduction circuitry
s
Latch-up performance exceeds 500 mA
s
ESD performance:
Human body model
>
2000V
Machine model
>
200V
Note 1:
To ensure the high-impedance state during power up or down, OE
should be tied to V
CC
through a pull-up resistor: the minimum value or the
resistor is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number
74LCX652WM
74LCX652MSA
74LCX652MTC
Package Number
M24B
MSA24
MTC24
Package Description
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300鈥?Wide
24-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
A
0
鈥揂
7
, B
0
鈥揃
7
CPAB, CPBA
SAB, SBA
OEAB, OEBA
Description
A and B Inputs/3-STATE Outputs
Clock Inputs
Select Inputs
Output Enable Inputs
漏 1999 Fairchild Semiconductor Corporation
DS011998.prf
www.fairchildsemi.com
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