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74F350 4-Bit Shifter with 3-STATE Outputs
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 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 74F350 can perform zero-backfill, sign-extend or endaround (barrel) shift functions.
Features
s Linking inputs for word expansion s 3-STATE outputs for extending shift range
Ordering Code:
Order Number 74F350SC 74F350SJ 74F350PC Package Number M16A M16D N16E Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 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 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 Outputs O1 Z I1 I0 I-1 I-2 O2 Z I2 I1 I0 I-1 O3 Z I3 I2 I1 I0
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance
(c) 1999 Fairchild Semiconductor Corporation
DS009518
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74F350
Unit Loading/Fan Out
Pin Names S0, S1 I-3-I3 OE O0-O3 Description 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 A/-1.2 mA 20 A/-1.2 mA 20 A/-1.2 mA -3 mA/24 mA (20 mA)
Functional Description
The 74F350 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 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 during a shift down; or end around, where the data word forms a continuous loop.
Logic Equations
O0 = S0S1I0 + S0S1I-1 + S0S1I-2 + S0S1I-3 O1 = S0S1I1 + S0S1I0 + S0S1I-1 + S0S1I-2 O2 = S0S1I2 + S0S1I1 + S0S1I0 + S0S1I-1 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
Applications
16-Bit Shift-Up 0 to 3 Places, Zero Backfill
Function Table
S1 L L H H S0 L H L H Shift Function No Shift Shift 1 Place Shift 2 Places Shift 3 Places
8-Bit End Around Shift 0 to 7 Places
Function Table
S2 L L L L H H H H S1 L L H H L L H H S0 L H L H L H L H Shift Function No Shift Shift End Around 1 Shift End Around 2 Shift End Around 3 Shift End Around 4 Shift End Around 5 Shift End Around 6 Shift End Around 7
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74F350
13-Bit Twos Complement Scaler
Function Table
S1 L L H H L/8 H/4 L/2 H No Change S0 Scale
1/ 8 1/ 4
1/2 1
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74F350
Absolute Maximum Ratings(Note 1)
Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias VCC Pin Potential to Ground Pin Input Voltage (Note 2) Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output 3-STATE Output Current Applied to Output in LOW State (Max) twice the rated IOL (mA) -0.5V to VCC -0.5V to +5.5V -65C to +150C -55C to +125C -55C to +150C -0.5V to +7.0V -0.5V to +7.0V -30 mA to +5.0 mA
Recommended Operating Conditions
Free Air Ambient Temperature Supply Voltage 0C to +70C +4.5V to +5.5V
Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol VIH VIL VCD VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage 10% VCC 10% VCC 5% VCC 10% VCC VOL IIH IBVI ICEX VID IOD IIL IOZH IOZL IOS IZZ ICCH ICCL ICCZ Output LOW Voltage Input HIGH Current Input HIGH Current Breakdown Test Output HIGH Leakage Current Input Leakage Test Output Leakage Circuit Current Input LOW Current Output Leakage Current Output Leakage Current Output Short-Circuit Current Bus Drainage Test Power Supply Current Power Supply Current Power Supply Current 34 40 40 -60 4.75 3.75 -1.2 50 -50 -150 500 42 57 57 10% VCC 2.5 2.4 2.7 2.7 0.5 5.0 7.0 50 V A A A V A mA A A mA A mA mA mA Min Max Max Max 0.0 0.0 Max Max Max Max 0.0V Max Max Max Min 2.0 0.8 -1.2 Typ Max Units V V V V Min Min VCC Conditions Recognized as a HIGH Signal Recognized as a LOW Signal IIN = -18 mA IOH = -1 mA IOH = -3 mA IOH = -1 mA IOH = -3 mA IOL = 24 mA VIN = 2.7V VIN = 7.0V VOUT = VCC IID = 1.9 A All Other Pins Grounded VIOD = 150 mV All Other Pins Grounded VIN = 0.5V VOUT = 2.7V VOUT = 0.5V VOUT = 0V VOUT = 5.25V VO = HIGH VO = LOW VO = HIGH Z
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74F350
AC Electrical Characteristics
TA = +25C Symbol Parameter Min tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Output Disable Time Propagation Delay In to On Propagation Delay Sn to On Output Enable Time 3.0 2.5 4.0 3.0 2.5 4.0 2.0 2.0 VCC = +5.0V CL = 50 pF Typ 4.5 4.0 7.8 6.5 5.0 7.0 3.9 4.0 Max 6.0 5.5 10.0 8.5 7.0 9.0 5.5 5.5 TA = 0C to +70C VCC = +5.0V CL = 50 pF Min 3.0 2.5 4.0 3.0 2.5 4.0 2.0 2.0 Max 7.0 6.5 13.5 9.5 8.0 10.0 6.5 7.5 ns ns ns Units
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74F350
Physical Dimensions inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M16A
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M16D
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74F350 4-Bit Shifter with 3-STATE Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N16E
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com 8 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com

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