datasheet4u.com

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Fairchild Semiconductor Electronic Components Datasheet

74ABT16652 Datasheet

16-Bit Transceivers and Registers with 3-STATE Outputs

No Preview Available !

74ABT16652 pdf
April 1993
Revised January 1999
74ABT16652
16-Bit Transceivers and Registers with 3-STATE Outputs
General Description
The ABT16652 consists of sixteen bus transceiver circuits
with D-type flip-flops, and control circuitry arranged for mul-
tiplexed transmission of data directly from the input bus or
from the internal registers. Each byte has separate control
inputs which can be shorted together for full 16-bit opera-
tion. Data on the A or B bus will be clocked into the regis-
ters as the appropriate clock pin goes to 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 Separate control logic for each byte
s A and B output sink capability of 64 mA, source
capability of 32 mA
s Guaranteed output skew
s High impedance glitch free bus loading during entire
power up and power down cycle
s Nondestructive hot insertion capability
Ordering Code:
Order Number Package Number
Package Description
74ABT16652CSSC
MS56A
56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300” Wide
74ABT16652CMTD
MTD56
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Pin Descriptions
Connection Diagram
Pin Names
A0–A16
B0–B16
CPABn, CPBAn
SABn, SBAn
OEABn, OEBAn
Descriptions
Data Register A Inputs/
3-STATE Outputs
Data Register B Inputs/
3-STATE Outputs
Clock Pulse Inputs
Select Inputs
Output Enable Inputs
© 1999 Fairchild Semiconductor Corporation DS011599.prf
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

74ABT16652 Datasheet

16-Bit Transceivers and Registers with 3-STATE Outputs

No Preview Available !

74ABT16652 pdf
Functional Description
In the transceiver mode, data present at the HIGH imped-
ance port may be stored in either the A or B register or
both.
The select (SABn, SBAn) controls can multiplex stored and
real-time.
The examples in Figure 1 demonstrate the four fundamen-
tal bus-management functions that can be performed with
the ABT16652.
Data on the A or B data bus, or both can be stored in the
internal D flip-flop by LOW to HIGH transitions at the
appropriate Clock Inputs (CPABn, CPBAn) regardless of
the Select or Output Enable Inputs. When SAB and SBA
are in the real time transfer mode, it is also possible to
store data without using the internal D flip-flops by simulta-
neously enabling OEABn and OEBAn. In this configuration
each Output reinforces its Input. Thus when all other data
sources to the two sets of bus lines are in a HIGH imped-
ance state, each set of bus lines will remain at its last state.
Note A: Real-Time
Transfer Bus B to Bus A
Note C: Storage
OEAB OEBA CPAB CPBA SAB SBA
1 1 1 1 11
L L X X XL
Note B: Real-Time
Transfer Bus A to Bus B
OEAB OEBA CPAB CPBA SAB SBA
1 1 1 1 11
X H
X XX
L X X
XX
 L H
XX
Note D: Transfer Storage
Data to A or B
OEAB OEBA CPAB CPBA SAB SBA
1 1 1 1 11
H H X X LX
FIGURE 1.
OEAB OEBA CPAB1 CPBA SAB SBA
11
1 11
H L H or L H or L H H
www.fairchildsemi.com
2


Part Number 74ABT16652
Description 16-Bit Transceivers and Registers with 3-STATE Outputs
Maker Fairchild Semiconductor
Total Page 9 Pages
PDF Download
74ABT16652 pdf
74ABT16652 Datasheet PDF
[partsNo] view html
View PDF for Mobile








Similar Datasheet

1 74ABT16652 16-bit transceiver/register NXP
NXP
74ABT16652 pdf
2 74ABT16652 16-Bit Transceivers and Registers with 3-STATE Outputs Fairchild Semiconductor
Fairchild Semiconductor
74ABT16652 pdf





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy