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For:char Printed on:Mon, Feb 6, 1995 09:48:35 From book:DL121CH4 (5) VIEW Document:MC74F350 (5) VIEW Last saved on:Fri, Feb 3, 1995 16:04:28
MC54/74F350 4-BIT SHIFTER (With 3-State Outputs)
The MC54/74F350 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 accomplished 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 F350 can perform zero-backfill, sign-extend or end-around (barrel) shift functions.
4-BIT SHIFTER (With 3-State Outputs)
FASTTM SCHOTTKY TTL
* Linking Inputs for Word Expansion * 3-State Outputs for Extending Shift Range
FUNCTIONAL DESCRIPTION The F350 is operationally equivalent to a 4-input multiplexer 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 7-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 during a shift down; or end around, where the data word forms a continuous loop. LOGIC EQUATIONS O0 = S0 S1 I0 + S0 S1 l-1 + S0 S1 I-2 + S0 S1 I-3 O1 = S0 S1 I1 + S0 S1 I0 + S0 S1 l-1 + S0 S1 I-2 O2 = S0 S1 I2 + S0 S1 I1 + S0 S1 I0 + S0 S1 I-1 O3 = S0 S1 I3 + S0 S1 I2 + S0 S1 I1 + S0 S1 I0 TRUTH TABLE
Inputs OE H L L L L S1 X L L H H S0 X L H L H O0 Z I0 I-1 I-2 I-3 O1 Z I1 I0 I-1 I-2 Outputs O2 Z I2 I1 I0 I-1 O3 Z I3 I2 I1 I0 J SUFFIX CERAMIC CASE 620-09
16 1
16 1
N SUFFIX PLASTIC CASE 648-08
16 1
D SUFFIX SOIC CASE 751B-03
ORDERING INFORMATION
MC54FXXXJ MC74FXXXN MC74FXXXD Ceramic Plastic SOIC
LOGIC SYMBOL
13 9 10 OE S1 S0 I-3 I-2 O0 I-1 O1 I0 O2 I1 O3 I2 I3 VCC = PIN 16 GND = PIN 8
H = HIGH Voltage Level L = LOW Voltage Level
Z = High Impedance X = Immaterial
1 2 3 4 5 6 7
CONNECTION DIAGRAM
VCC 16 O0 15 O1 14 OE 13 O2 12 O3 11 S0 10 S1 9
15 14 12 11
1 I-3
2 I-2
3 I-1
4 I0
5 I1
6 I2
7 I3
8 GND
FAST AND LS TTL DATA 4-153
MC54/74F350
LOGIC DIAGRAM
I-3 I-2 I-1 I0 I1 I2 I3 S1 S0 OE
O0 Symbol VCC TA IOH IOL Supply Voltage
O1 Parameter
O2 Min 54, 74 54 4.5 - 55 0 -- --
O3 Typ 5.0 25 25 -- -- Max 5.5 125 70 - 3.0 24 Unit V C mA mA
GUARANTEED OPERATING RANGES
Operating Ambient Temperature Range 74 Output Current -- High Output Current -- Low 54, 74 54, 74
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol VIH VIL VIK VOH VOL IOZH IOZL IIH IIL IOS ICCH ICCL ICCZ Power Supply Current Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage 54, 74 Output HIGH Voltage 74 Output LOW Voltage Output OFF Current -- HIGH Output OFF Current -- LOW Input HIGH Current 100 Input LOW Current Output Short Circuit Current (Note 2) - 60 22 26 26 -1.2 -150 35 41 42 mA 2.7 3.3 0.35 0.5 50 - 50 20 V V A A A mA mA 2.4 3.3 Min 2.0 0.8 -1.2 Typ Max Unit V V V V Test Conditions Guaranteed Input HIGH Voltage Guaranteed Input LOW Voltage IIN = -18 mA IOH = - 3.0 mA IOH = - 3.0 mA IOL = 24 mA VOUT = 2.7 V VOUT = 0.5 V VIN = 2.7 V VIN = 7.0 V VIN = 0.5 V VOUT = 0 V Outputs HIGH Outputs LOW Outputs OFF VCC = MAX VCC = MIN VCC = 4.5 V VCC = 4.75 V VCC = MIN VCC = MAX VCC = MAX VCC = MAX VCC = MAX VCC = MAX
NOTES: 1. For conditions such as MIN or MAX, use the appropriate value specified under guaranteed operating ranges. NOTES: 2. Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA 4-154
MC54/74F350
AC CHARACTERISTICS
54/74F TA = +25C VCC = +5.0 V CL = 50 pF Symbol tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Propagation Delay In to 0n Propagation Delay Sn to On Output Enable Time Output Disable Time Min 3.0 2.5 4.0 3.0 2.5 4.0 2.0 1.5 Max 6.0 5.5 10 8.5 7.0 9.0 5.5 5.5 54F TA = -55 to +125C VCC = 5.0 V 10% CL = 50 pF Min 3.0 2.5 4.0 3.0 2.5 4.0 2.0 1.5 Max 7.5 7.0 13.5 10 10.5 11 7.0 9.0 74F TA = 0 to +70C VCC = 5.0 V 10% CL = 50 pF Min 3.0 2.5 4.0 3.0 2.5 4.0 2.0 1.5 Max 7.0 6.5 11 9.5 8.0 10 6.5 6.5 Unit ns ns ns ns
APPLICATIONS 16-Bit Shift-Up 0 to 3 Pieces, Zero Backfill
0123 4 567 8 9 10 11 12 13 14 15
GND S0 S1 OE S0 S1 OE 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Y0 Y1 Y2 Y3 I-3 I-2 I-1 I0 I1 I2 I3 S0 S1 OE Y0 Y1 Y2 Y3 I-3 I-2 I-1 I0 I1 I2 I3 S0 S1 OE Y0 Y1 Y2 Y3 I-3 I-2 I-1 I0 I1 I2 I3 S0 S1 OE Y0 Y1 Y2 Y3 I-3 I-2 I-1 I0 I1 I2 I3
S1 L L H H
S0 L H L H
NO SHIFT SHIFT 1 PLACE SHIFT 2 PLACES SHIFT 3 PLACES
FAST AND LS TTL DATA 4-155
MC54/74F350
8-Bit End Around Shift 0 to 7 Pieces
0 123 4 567
S0 S1
I-3 I-2 I-1 I0 I1 I2 I3
S0 S1
I-3 I-2 I-1 I0 I1 I2 I3
S0 S1
I-3 I-2 I-1 I0 I1 I2 I3
S0 S1
I-3 I-2 I-1 I0 I1 I2 I3
OE S0 S1 S2 S2
Y0
Y1
Y2
Y3
OE
Y0
Y1
Y2
Y3
OE
Y0
Y1
Y2
Y3
OE
Y0
Y1
Y2
Y3
0
1
2
3
4
5
6
7
S2 L L L L H
S1 L L H H L
S0 L H L H L
NO SHIFT SHIFT END AROUND 1 SHIFT END AROUND 2 SHIFT END AROUND 3 SHIFT END AROUND 4
S2 H H H
S1 L H H
S0 H L H
SHIFT END AROUND 5 SHIFT END AROUND 6 SHIFT END AROUND 7
13-Bit Twos Complement Scaler
12 11 10 9 8 7 6 5 4 3 2 1 S
S0 S1
I-3 I-2 I-1 I0 I1 I2 I3
S0 S1
I-3 I-2 I-1 I0 I1 I2 I3
S0 S1
I-3 I-2 I-1 I0 I1 I2 I3
OE S0 S1
Y0
Y1
Y2
Y3
OE
Y0
Y1
Y2
Y3
OE
Y0
Y1
Y2
Y3
12
11
10
9
8
7
6
5
4
3
2
1
S
S1 L L H H
S0 L/8 H/4 L/2 H NO CHANGE
SCALE 1/8 1/4 1/2 1
FAST AND LS TTL DATA 4-156

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