74LVX157 LOW VOLTAGE QUAD 2 CHANNEL MULTIPLEXER WITH 5V TOLERANT INPUTS HIGH SPEED: t = 5.1 ns (TYP.) at V = 3.3V PD CC 5V TOLERANT INPUTS INPUT VOLTAGE LEVEL: V =0.8V, V =2V at V =3V IL IH CC LOW POWER DISSIPATION: SOP TSSOP I = 2 A (MAX.) at T =25C CC A LOW NOISE: V = 0.3V (TYP.) at V = 3.3V OLP CC Table 1: Order Codes SYMMETRICAL OUTPUT IMPEDANCE: I = I = 4mA (MIN) OH OL PACKAGE T & R BALANCED PROPAGATION DELAYS: SOP 74LVX157MTR t t PLH PHL TSSOP 74LVX157TTR OPERATING VOLTAGE RANGE: V (OPR) = 2V to 3.6V (1.2V Data Retention) CC PIN AND FUNCTION COMPATIBLE WITH input is held high, selection of data is inhibited and 74 SERIES 157 all the outputs become low. The SELECT IMPROVED LATCH-UP IMMUNITY decoding determines whether the A or B inputs get routed to their corresponding Y outputs. POWER DOWN PROTECTION ON INPUTS Power down protection is provided on all inputs and 0 to 7V can be accepted on inputs with no DESCRIPTION regard to the supply voltage. The 74LVX157 is a low voltage CMOS QUAD 2 This device can be used to interface 5V to 3V CHANNEL MULTIPLEXER fabricated with system. It combines high speed performance with sub-micron silicon gate and double-layer metal 2 the true CMOS low power consumption. wiring C MOS technology. It is ideal for low All inputs and outputs are equipped with power, battery operated and low noise 3.3V protection circuits against static discharge, giving applications. them 2KV ESD immunity and transient excess It consists of four 2-input digital multiplexers with voltage. common select and strobe inputs. When STROBE Figure 1: Pin Connection And IEC Logic Symbols Rev. 3 August 2004 1/12 Obsolete Product(s) - Obsolete Product(s)74LVX157 Figure 2: Input Equivalent Circuit Table 2: Pin Description PIN N 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) Positive Supply Voltage 16 V CC Table 3: Truth Table INPUTS OUTPUT STROBE SELECT A B Y H XXX L LLL X L LL H X H LH X L L LH X H H X : Dont Care Table 4: Absolute Maximum Ratings Symbol Parameter Value Unit V Supply Voltage -0.5 to +7.0 V CC V DC Input Voltage -0.5 to +7.0 V I DC Output Voltage -0.5 to V + 0.5 V V O CC I DC Input Diode Current - 20 mA IK I DC Output Diode Current 20 mA OK I DC Output Current 25 mA O I or I DC V or Ground Current 50 mA CC GND CC T Storage Temperature -65 to +150 C stg T Lead Temperature (10 sec) 300 C L Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Table 5: Recommended Operating Conditions Symbol Parameter Value Unit V Supply Voltage (note 1) 2 to 3.6 V CC V Input Voltage 0 to 5.5 V I V Output Voltage 0 to V V O CC T Operating Temperature -55 to 125 C op dt/dv Input Rise and Fall Time (note 2) (V = 3.3V) 0 to 100 ns/V CC 1) Truth Table guaranteed: 1.2V to 3.6V 2) V from 0.8V to 2.0V IN 2/12 Obsolete Product(s) - Obsolete Product(s)