Part # 74AC257 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: Quad 2 channel multiplexer (3-state)

Part Details:

74AC257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE) s HIGH SPEED: t PD = 4.5ns (TYP.) at VCC = 5V s LOW POWER DISSIPATION:ICC = 4µA(MAX.) at TA=25°C s HIGH NOISE IMMUNITY:VNIH = VNIL = 28 % VCC (MIN.) s 50 TRANSMISSION LINE DRIVING CAPABILITY DIP SOP TSSOP s SYMMETRICAL OUTPUT IMPEDANCE:|IOH| = IOL = 24mA (MIN) s BALANCED PROPAGATION DELAYS: ORDER CODES tPLH tPHL PACKAGE TUBE T & R s OPERATING VOLTAGE RANGE:V DIP 74AC257B CC (OPR) = 2V to 6V SOP 74AC257M 74AC257MTR s PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 257 TSSOP 74AC257TTR s IMPROVED LATCH-UP IMMUNITY high impedance state. If SELECT input is held DESCRIPTION LOW, "A" data is selected, when SELECT input is The 74AC257 is an advanced high-speed CMOS held HIGH, "B" data is chosen. QUAD 2-CHANNEL MULTIPLEXER (3-STATE) All inputs and outputs are equipped with fabricated with sub-micron silicon gate and protection circuits against static discharge, giving double-layer metal wiring C2MOS tecnology. them 2KV ESD immunity and transient excess It is composed of four independent 2-channel voltage. multiplexer with common SELECT and ENABLE(OE) inputs. It is a non-inverting multiplexer. Whenthe OE input is held HIGH,all the output become in PIN CONNECTION AND IEC LOGIC SYMBOLS April 2001 1/11

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74AC257.pdf Datasheet