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74F350 PDF даташит

Спецификация 74F350 изготовлена ​​​​«Fairchild» и имеет функцию, называемую «4-Bit Shifter with 3-STATE Outputs».

Детали детали

Номер произв 74F350
Описание 4-Bit Shifter with 3-STATE Outputs
Производители Fairchild
логотип Fairchild логотип 

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74F350 Даташит, Описание, Даташиты
April 1988
Revised August 1999
74F350
4-Bit Shifter with 3-STATE Outputs
General Description
The 74F350 is a specialized multiplexer that accepts a 4-bit
word and shifts it 0, 1, 2 or 3 places, as determined by two
Select (S0, S1) inputs. For expansion to longer words, three
linking inputs are provided for lower-order bits; thus two
packages can shift an 8-bit word, four packages a 16-bit
word, etc. Shifting by more than three places is accom-
plished by paralleling the 3-STATE outputs of different
packages and using the Output Enable (OE ) inputs as a
third Select level. With appropriate interconnections, the
74F350 can perform zero-backfill, sign-extend or end-
around (barrel) shift functions.
Features
s Linking inputs for word expansion
s 3-STATE outputs for extending shift range
Ordering Code:
Order Number Package Number
Package Description
74F350SC
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
74F350SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F350PC
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Truth Table
Inputs
Outputs
OE S1 S0 O0 O1 O2 O3
HXXZ Z Z Z
L L L I0 I1 I2 I3
L L H I1 I0 I1 I2
L H L I2 I1 I0 I1
L H H I3 I2 I1 I0
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
© 1999 Fairchild Semiconductor Corporation DS009518
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74F350 Даташит, Описание, Даташиты
Unit Loading/Fan Out
Pin Names
Description
S0, S1
I3–I3
OE
O0–O3
Select Inputs
Data Inputs
Output Enable Input (Active LOW)
3-STATE Outputs
U.L.
HIGH/LOW
1.0/2.0
1.0/2.0
1.0/2.0
150/40 (33.3)
Input IIH/IIL
Output IOH/IOL
20 µA/1.2 mA
20 µA/1.2 mA
20 µA/1.2 mA
3 mA/24 mA (20 mA)
Functional Description
The 74F350 is operationally equivalent to a 4-input multi-
plexer with the inputs connected so that the select code
causes successive one-bit shifts of the data word. This
internal connection makes it possible to perform shifts of 0,
1, 2 or 3 places on words of any length.
A 4-bit data word is introduced at the In inputs and is
shifted according to the code applied to the select inputs
S0, S1. Outputs O0–O3 are 3-STATE, controlled by an
active LOW output enable (OE). When OE is LOW, data
outputs will follow selected data inputs; when HIGH, the
data outputs will be forced to the high impedance state.
This feature allows shifters to be cascaded on the same
output lines or to a common bus. The shift function can be
logical, with zeros pulled in at either or both ends of the
shifting field; arithmetic, where the sign bit is repeated dur-
ing a shift down; or end around, where the data word forms
a continuous loop.
Logic Equations
O0 = S0S1I0 + S0S1I1 + S0S1I2 + S0S1I3
O1 = S0S1I1 + S0S1I0 + S0S1I1 + S0S1I2
O2 = S0S1I2 + S0S1I1 + S0S1I0 + S0S1I1
O3 = S0S1I3 + S0S1I2 + S0S1I1 + S0S1I0
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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74F350 Даташит, Описание, Даташиты
Applications
16-Bit Shift-Up 0 to 3 Places, Zero Backfill
Function Table
S1 S0
Shift Function
L L No Shift
L H Shift 1 Place
H L Shift 2 Places
H H Shift 3 Places
8-Bit End Around Shift 0 to 7 Places
Function Table
S2 S1 S0
Shift Function
L L L No Shift
L L H Shift End Around 1
L H L Shift End Around 2
L H H Shift End Around 3
H L L Shift End Around 4
H L H Shift End Around 5
H H L Shift End Around 6
H H H Shift End Around 7
3 www.fairchildsemi.com










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