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74ACT652 반도체 회로 부품 판매점

Transceiver/Register



Fairchild Semiconductor 로고
Fairchild Semiconductor
74ACT652 데이터시트, 핀배열, 회로
August 1999
Revised September 2000
74ACT652
Transceiver/Register
General Description
The ACT652 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.
Features
s Independent registers for A and B buses
s Multiplexed real-time and stored data
s Outputs source/sink 24 mA
s TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74ACT652SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74ACT652MTC
MTC24
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ACT652SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
A0A7, B0B7
CPAB, CPBA
SAB, SBA
OEAB, OEBA
Description
A and B Inputs/3-STATE Outputs
Clock Inputs
Select Inputs
Output Enable Inputs
FACTis a trademark of Fairchild Semiconductor Corporation.
© 2000 Fairchild Semiconductor Corporation DS500310
www.fairchildsemi.com


74ACT652 데이터시트, 핀배열, 회로
Function Table
Inputs
Inputs/Outputs (Note 1)
Operating Mode
OEAB OEBA CPAB CPBA SAB SBA A0 thru A7 B0 thru B7
 L H H or L H or L X X Input
LH
XX
Input
Isolation
Store A and B Data
X H
H or L
X
X Input
Not Specified Store A, Hold B
 H H
L X H or L
X X Input
Output
X X Not Specified Input
Store A in Both Registers
Hold A, Store B
 L L
X X Output
Input
Store B in Both Registers
L L X X X L Output
Input
Real-Time B Data to A Bus
L L X H or L X H
Store B Data to A Bus
H H X X L X Input
Output
Real-Time A Data to B Bus
H H H or L X H X
Stored A Data to B Bus
H L H or L H or L H H Output
Output
Stored A Data to B Bus and
Stored B Data to A Bus
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
= LOW-to-HIGH Clock Transition
Note 1: The data output functions may be enabled or disabled by various signals at OEAB or OEBA inputs. Data input functions are always enabled, i.e.,
data at the bus pins will be stored on every LOW-to-HIGH transition on the clock inputs.
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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74ACT652 transceiver

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