74AC157MTR STMicroelectronics

74AC157 QUAD 2 CHANNEL MULTIPLEXER HIGH SPEED: t = 4ns (TYP.) at V = 5V PD CC LOW POWER DISSIPATION: I = 4A(MAX.) at T =25C CC A HIGH NOISE IMMUNITY: V = V = 28 % V (MIN.) NIH NIL CC 50 TRANSMISSION LINE DRIVING DIP SOP TSSOP CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: I = I = 24mA (MIN) OH OL BALANCED PROPAGATION DELAYS: ORDER CODES t t PLH PHL PACKAGE TUBE T & R OPERATING VOLTAGE RANGE: DIP 74AC157B V (OPR) = 2V to 6V CC SOP 74AC157M 74AC157MTR PIN AND FUNCTION COMPATIBLE WITH TSSOP 74AC157TTR 74 SERIES 157 IMPROVED LATCH-UP IMMUNITY input is held high selection of data is inhibit and all DESCRIPTION the outputs become low. The SELECT decoding determines whether the A or B inputs get routed to The 74AC157 is an advanced high-speed CMOS their corresponding Y outputs. QUAD 2-CHANNEL MULTIPLEXER fabricated All inputs and outputs are equipped with with sub-micron silicon gate and double-layer 2 protection circuits against static discharge, giving metal wiring C MOS tecnology. them 2KV ESD immunity and transient excess It consists of four 2-input digital multiplexer with voltage. common SELECT and STROBE inputs. It is a non-inverting multiplexer. When the STROBE PIN CONNECTION AND IEC LOGIC SYMBOLS April 2001 1/10 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) 74AC157 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1 SELECT Common Data Select Inputs 2, 5, 11, 14 1A to 4A Data Inputs From Source A 3, 6, 10, 13 1B to 4B Data Inputs From Source B 4, 7, 9, 12 1Y to 4Y Multiplexer Outputs 15 STROBE Strobe Input 8 GND Ground (0V) 16 V Positive Supply Voltage CC TRUTH TABLE INPUTS OUTPUT STROBE SELECT A B Y HX XX L LLL X L LL H X H LH X L L LH X H H X : Dont Care LOGIC DIAGRAM 2/10 Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)