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| DUAL 4-INPUT MULTIPLEXER The LSTTL / MSI SN54 / 74LS153 is a very high speed Dual 4-Input Multiplexer with common select inputs and individual enable inputs for each section. It can select two bits of data from four sources. The two buffered outputs present data in the true (non-inverted) form. In addition to multiplexer operation, the LS153 can generate any two functions of three variables. The LS153 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families. SN54/74LS153 * * * * DUAL 4-INPUT MULTIPLEXER LOW POWER SCHOTTKY Multifunction Capability Non-Inverting Outputs Separate Enable for Each Multiplexer Input Clamp Diodes Limit High Speed Termination Effects CONNECTION DIAGRAM DIP (TOP VIEW) VCC 16 Eb 15 S0 14 I3b 13 I2b 12 I1b 11 I0b 10 Zb 9 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. 16 J SUFFIX CERAMIC CASE 620-09 1 1 Ea 2 S1 3 I3a 4 I2a 5 I1a 6 I0a 7 Za 8 GND LOADING (Note a) HIGH LOW 0.25 U.L. 0.25 U.L. 0.25 U.L. 5 (2.5) U.L. 16 1 N SUFFIX PLASTIC CASE 648-08 PIN NAMES S0 E I0, I1 Z Common Select Input Enable (Active LOW) Input Multiplexer Inputs Multiplexer Output (Note b) 0.5 U.L. 0.5 U.L. 0.5 U.L. 10 U.L. 16 1 D SUFFIX SOIC CASE 751B-03 NOTES: a) 1 TTL Unit Load (U.L.) = 40 A HIGH/1.6 mA LOW. b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges. ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC LOGIC DIAGRAM Ea I0a 1 6 5 I1a 4 I2a 3 I3a 2 S1 14 S0 10 I0b 11 I1b 12 I2b 13 I3b Eb 15 LOGIC SYMBOL 1 6543 10 11 12 13 15 I0b I1b I2b I3b Eb 14 2 Ea I0a I1a I2a I3a S0 Sa Za 7 Zb 9 7 Za VCC = PIN 16 GND = PIN 8 = PIN NUMBERS VCC = PIN 16 GND = PIN 8 9 Zb FAST AND LS TTL DATA 5-1 SN54/74LS153 FUNCTIONAL DESCRIPTION The LS153 is a Dual 4-input Multiplexer fabricated with Low Power, Schottky barrier diode process for high speed. It can select two bits of data from up to four sources under the control of the common Select Inputs (S0, S1). The two 4-input multiplexer circuits have individual active LOW Enables (Ea, Eb) which can be used to strobe the outputs independently. When the Enables (Ea, Eb) are HIGH, the corresponding outputs (Za, Zb) are forced LOW. The LS153 is the logic implementation of a 2-pole, 4-position switch, where the position of the switch is determined by the logic levels supplied to the two Select Inputs. The logic equations for the outputs are shown below. Za = Ea (I0a S1 S0 + I1a S1 S0 + I2a S1 S0 + I3a S1 S0) Zb = Eb (I0b S1 S0 + I1b S1 S0 + I2b S1 S0 + I3b S1 S0) The LS153 can be used to move data from a group of registers to a common output bus. The particular register from which the data came would be determined by the state of the Select Inputs. A less obvious application is a function generator. The LS153 can generate two functions of three variables. This is useful for implementing highly irregular random logic. TRUTH TABLE SELECT INPUTS S0 X L L H H L L H H S1 X L L L L H H H H E H L L L L L L L L INPUTS (a or b) I0 X L H X X X X X X I1 X X X L H X X X X I2 X X X X X L H X X I3 X X X X X X X L H OUTPUT Z L L H L H L H L H H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current -- High Output Current -- Low Parameter 54 74 54 74 54, 74 54 74 Min 4.5 4.75 - 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70 - 0.4 4.0 8.0 Unit V C mA mA FAST AND LS TTL DATA 5-2 SN54/74LS153 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol S bl VIH VIL VIK VOH Parameter P Input HIGH Voltage 54 Input LOW Voltage 74 Input Clamp Diode Voltage 54 Output HIGH Voltage 74 54, 74 VOL Output LOW Voltage 74 Input HIGH Current 0.1 Input LOW Current Short Circuit Current (Note 1) Power Supply Current - 20 - 0.4 - 100 10 0.35 0.5 20 IIH IIL IOS ICC V A mA mA mA mA 2.7 3.5 0.25 0.4 V V 2.5 - 0.65 3.5 0.8 - 1.5 V V Min 2.0 0.7 V Typ Max Unit Ui V Test C di i T Conditions Guaranteed Input HIGH Voltage for All Inputs Guaranteed Input LOW Voltage for p g All Inputs VCC = MIN, IIN = - 18 mA VCC = MIN, IOH = MAX, VIN = VIH , , or VIL per Truth Table IOL = 4.0 mA IOL = 8.0 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table VCC = MAX, VIN = 2.7 V VCC = MAX, VIN = 7.0 V VCC = MAX, VIN = 0.4 V VCC = MAX VCC = MAX Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25C) Limits Symbol S bl tPLH tPHL tPLH tPHL tPLH tPHL Parameter P Propagation Delay Data to Output Propagation Delay Select to Output Propagation Delay Enable to Output Min Typ 10 17 19 25 16 21 Max 15 26 29 38 24 32 Unit Ui ns ns ns Figure 2 Figure 1 Figure 2 VCC = 5.0 V 50 CL = 15 pF Test C di i T Conditions AC WAVEFORMS VIN 1.3 V tPHL 1.3 V tPLH 1.3 V VIN 1.3 V tPHL 1.3 V tPLH 1.3 V VOUT 1.3 V VOUT 1.3 V Figure 1 Figure 2 FAST AND LS TTL DATA 5-3 |
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