54F/74F257A Quad 2-Input Multiplexer with TRI-STATEÉ Outputs General Description Features The ’F257A is a quad 2-input multiplexer with TRI-STATE outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (non-inverted) form. The outputs may be switched to a high impedance state with a HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems. Y Commercial Y Y Y Multiplexer expansion by tying outputs together Non-inverting TRI-STATE outputs Input clamp diodes limit high-speed termination effects Guaranteed 4000V minimum ESD protection Package Number Military Package Description N16E 16-Lead (0.300× Wide) Molded Dual-In-Line J16A 16-Lead Ceramic Dual-In-Line 74F257ASC (Note 1) M16A 16-Lead (0.150× Wide) Molded Small Outline, JEDEC 74F257ASJ (Note 1) M16D 16-Lead (0.300× Wide) Molded Small Outline, EIAJ 54F257AFM (Note 2) W16A 16-Lead Cerpack 54F257ALL (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C 74F257APC 54F257ADM (Note 2) Note 1: Devices also available in 13× reel. Use suffix e SCX and SJX. Note 2: Military grade device with environmental and burn-in processing. Use suffix e DMQB, FMQB and LMQB. Logic Symbols Connection Diagrams Pin Assignment for DIP, SOIC and Flatpak Pin Assignment for LCC TL/F/9507–3 IEEE/IEC TL/F/9507 – 1 TL/F/9507 – 2 TL/F/9507–5 TRI-STATEÉ is a registered trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation TL/F/9507 RRD-B30M75/Printed in U. S. A. 54F/74F257A Quad 2-Input Multiplexer with TRI-STATE Outputs November 1994 Unit Loading/Fan Out 54F/74F Pin Names S OE I0a – I0d I1a – I1d Za – Zd Description U.L. HIGH/LOW Input IIH/IIL Output IOH/IOL Common Data Select Input TRI-STATE Output Enable Input (Active LOW) Data Inputs from Source 0 Data Inputs from Source 1 TRI-STATE Multiplexer Outputs 1.0/1.0 1.0/1.0 1.0/1.0 1.0/1.0 150/40 (33.3) 20 mA/b0.6 mA 20 mA/b0.6 mA 20 mA/b0.6 mA 20 mA/b0.6 mA b 3 mA/24 mA (20 mA) Functional Description Truth Table The ’F257A is a quad 2-input multiplexer with TRI-STATE outputs. It selects four bits of data from two sources under control of a Common Data Select input. When the Select input is LOW, the I0x inputs are selected and when Select is HIGH, the I1x inputs are selected. The data on the selected inputs appears at the outputs in true (non-inverted) form. The device is the logic implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the Select input. The logic equation for the outputs is shown below: Zn e OE # (In # S a Ion # S) Output Enable Select Input Data Inputs OE S I0 I1 Z H L L L L X H H L L X X X L H X L H X X Z L H L H Output H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Z e High Impedance When the Output Enable input (OE) is HIGH, the outputs are forced to a high impedance OFF state. If the outputs are tied together, all but one device must be in the high impedance state to avoid high currents that would exceed the maximum ratings. Designers should ensure the Output Enable signals to TRI-STATE devices whose outputs are tied together are designed so there is no overlap. Logic Diagram TL/F/9507 – 4 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 2 Absolute Maximum Ratings (Note 1) Recommended Operating Conditions If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Storage Temperature b 65§ C to a 150§ C Ambient Temperature under Bias Junction Temperature under Bias Plastic b 55§ C to a 125§ C Free Air Ambient Temperature Military Commercial b 55§ C to a 125§ C 0§ C to a 70§ C Supply Voltage Military Commercial b 55§ C to a 175§ C b 55§ C to a 150§ C a 4.5V to a 5.5V a 4.5V to a 5.5V VCC Pin Potential to Ground Pin b 0.5V to a 7.0V b 0.5V to a 7.0V Input Voltage (Note 2) b 30 mA to a 5.0 mA Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC e 0V) b 0.5V to VCC Standard Output b 0.5V to a 5.5V TRI-STATE Output Current Applied to Output in LOW State (Max) twice the rated IOL (mA) ESD Last Passing Voltage (Min) 4000V 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 54F/74F Parameter Min VIH Input HIGH Voltage VIL Input LOW Voltage VCD Input Clamp Diode Voltage VOH Output HIGH Voltage Typ Units Max 2.0 54F 10% VCC 54F 10% VCC 74F 10% VCC 74F 10% VCC 74F 5% VCC 74F 5% VCC VCC V 0.8 V b 1.2 V 2.5 2.4 2.5 2.4 2.7 2.7 Conditions Recognized as a HIGH Signal Recognized as a LOW Signal Min IIN e b18 mA V Min IOH IOH IOH IOH IOH IOH e e e e e e b 1 mA b 3 mA b 1 mA b 3 mA b 1 mA b 3 mA VOL Output LOW Voltage 54F 10% VCC 74F 10% VCC 0.5 0.5 V Min IOL e 20 mA IOL e 24 mA IIH Input HIGH Current 54F 74F 20.0 5.0 mA Max VIN e 2.7V IBVI Input HIGH Current Breakdown Test 54F 74F 100 7.0 mA Max VIN e 7.0V ICEX Output HIGH Leakage Current 54F 74F 250 50 mA Max VOUT e VCC VID Input Leakage Test 74F V 0.0 IID e 1.9 mA All Other Pins Grounded IOD Output Leakage Circuit Current 74F 3.75 mA 0.0 VIOD e 150 mV All Other Pins Grounded IIL Input LOW Current b 0.6 mA Max VIN e 0.5V IOZH Output Leakage Current 50 mA Max VOUT e 2.7V IOZL Output Leakage Current b 50 mA Max VOUT e 0.5V IOS Output Short-Circuit Current b 150 mA Max VOUT e 0V IZZ Bus Drainage Test 500 mA 0.0V VOUT e 5.25V ICCH Power Supply Current 9.0 15 mA Max VO e HIGH ICCL Power Supply Current 14.5 22 mA Max VO e LOW ICCZ Power Supply Current 15 23 mA Max VO e HIGH Z 4.75 b 60 3 AC Electrical Characteristics Symbol Parameter 74F 54F 74F TA e a 25§ C VCC e a 5.0V CL e 50 pF TA, VCC e Mil CL e 50 pF TA, VCC e Com CL e 50 pF Units Min Typ Max Min Max Min Max tPLH tPHL Propagation Delay In to Zn 2.5 2.0 4.5 4.2 5.5 5.5 2.0 1.5 7.0 7.0 2.0 2.0 6.0 6.0 ns tPLH tPHL Propagation Delay S to Zn 4.0 2.5 5.0 6.5 9.5 7.0 3.5 2.5 11.5 9.0 3.5 2.5 10.5 8.0 ns tPZH tPZL Output Enable Time 2.0 2.5 5.9 5.5 6.0 7.0 2.0 2.5 8.0 9.0 2.0 2.5 7.0 8.0 tPHZ tPLZ Output Disable Time 2.0 2.0 4.3 4.5 6.0 6.0 2.0 2.0 7.0 8.5 2.0 2.0 7.0 7.0 4 ns Ordering Information The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows: 74F 257A S Temperature Range Family 74F e Commercial 54F e Military C X Special Variations X e Devices shipped in 13× reels QB e Military grade with environmental and burn-in processing shipped in tubes Device Type Package Code P e Plastic DIP D e Ceramic DIP F e Flatpak L e Leadless Ceramic Chip Carrier (LCC) S e Small Outline SOIC JEDEC SJ e Small Outline SOIC EIAJ Temperature Range C e Commercial (0§ C to a 70§ C) M e Military (b55§ C to a 125§ C) Physical Dimensions inches (millimeters) 20-Lead Ceramic Leadless Chip Carrier (L) NS Package Number E20A 5 Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Dual-In-Line Package (D) NS Package Number J16A 16-Lead (0.150× Wide) Molded Small Outline Package, JEDEC (S) NS Package Number M16A 6 Physical Dimensions inches (millimeters) (Continued) 16-Lead (0.300× Wide) Molded Small Outline Package, EIAJ (SJ) NS Package Number M16D 16-Lead (0.300× Wide) Molded Dual-In-Line Package (P) NS Package Number N16E 7 54F/74F257A Quad 2-Input Multiplexer with TRI-STATE Outputs Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flatpak (F) NS Package Number W16A LIFE SUPPORT POLICY NATIONAL’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 NATIONAL 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 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. National Semiconductor Corporation 2900 Semiconductor Drive P.O. Box 58090 Santa Clara, CA 95052-8090 Tel: 1(800) 272-9959 TWX: (910) 339-9240 National Semiconductor GmbH Livry-Gargan-Str. 10 D-82256 F4urstenfeldbruck Germany Tel: (81-41) 35-0 Telex: 527649 Fax: (81-41) 35-1 National Semiconductor Japan Ltd. Sumitomo Chemical Engineering Center Bldg. 7F 1-7-1, Nakase, Mihama-Ku Chiba-City, Ciba Prefecture 261 Tel: (043) 299-2300 Fax: (043) 299-2500 2. A critical component is 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. National Semiconductor Hong Kong Ltd. 13th Floor, Straight Block, Ocean Centre, 5 Canton Rd. Tsimshatsui, Kowloon Hong Kong Tel: (852) 2737-1600 Fax: (852) 2736-9960 National Semiconductores Do Brazil Ltda. Rue Deputado Lacorda Franco 120-3A Sao Paulo-SP Brazil 05418-000 Tel: (55-11) 212-5066 Telex: 391-1131931 NSBR BR Fax: (55-11) 212-1181 National Semiconductor (Australia) Pty, Ltd. Building 16 Business Park Drive Monash Business Park Nottinghill, Melbourne Victoria 3168 Australia Tel: (3) 558-9999 Fax: (3) 558-9998 National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.