M74HCT157B1R

M74HCT157 QUAD 2 CHANNEL MULTIPLEXER ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 16ns (TYP.) at VCC = 4.5V LOW POWER DISSIPATION: ICC = 4µA(MAX.) at TA=25°C COMPATIBLE WITH TTL OUTPUTS : VIH = 2V (MIN.) VIL = 0.8V (MAX) SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 157 DESCRIPTION The M74HCT157 is an high speed CMOS QUAD 2 CHANNEL MULTIPLEXER fabricated with silicon gate C2MOS technology. This device consists of four 2-input digital multiplexer with common select and strobe inputs. When the STROBE(ST) input is held high, selection of data is inhibited and all the outputs become low. The SELECT decoding determines ) (s t c u DIP PACKAGE TUBE t e l o s b O TSSOP u d o r P e ORDER CODES DIP SOP TSSOP ) s ( ct SOP M74HCT157B1R M74HCT157M1R T&R M74HCT157RM13TR M74HCT157TTR whether the A or B inputs get routed to their corresponding Y outputs. All inputs are equipped with protection circuits against static discharge and transient excess voltage. d o r P e t e l o s b O PIN CONNECTION AND IEC LOGIC SYMBOLS September 2001 1/9 M74HCT157 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL 1 SELECT 2, 5, 11, 14 1A to 4A 3, 6, 10, 13 1B to 4B 4, 7, 9, 12 15 8 16 1Y to 4Y STROBE GND VCC NAME AND FUNCTION TRUTH TABLE Common Data Select Input Data Inputs From Source A Data Inputs From Source B Multiplexer Output Strobe Inputs Ground (0V) Positive Supply Voltage INPUTS STROBE SELECT A H L L L L X L L H H X L H X X X : Don’t Care ) (s LOGIC DIAGRAM t c u d o r P e t e l o s b O 2/9 B s b O e t e ol X X X L H ) s ( ct Pr u d o OUTPUTS Y L L H L H M74HCT157 ABSOLUTE MAXIMUM RATINGS Symbol VCC Parameter Value Supply Voltage Unit -0.5 to +7 V -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 V DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current ± 25 mA ± 50 mA 500(*) mW VI DC Input Voltage VO DC Output Voltage IIK ICC or IGND DC VCC or Ground Current PD Power Dissipation Tstg Storage Temperature TL Lead Temperature (10 sec) V ) s ( t -65 to +150 300 c u d °C °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied (*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C RECOMMENDED OPERATING CONDITIONS Symbol VCC e t e l Parameter Supply Voltage o s b VI Input Voltage VO Output Voltage Top Operating Temperature tr, tf Input Rise and Fall Time (VCC = 4.5 to 5.5V) s ( t c O ) o r P Value Unit 4.5 to 5.5 V 0 to VCC V 0 to VCC V -55 to 125 °C 0 to 500 ns u d o r P e t e l o s b O 3/9 M74HCT157 DC SPECIFICATIONS Test Condition Symbol VIH Parameter VIL VOL II High Level Output Voltage 4.5 Low Level Output Voltage 4.5 Input Leakage Current Quiescent Supply Current Additional Worst Case Supply Current ICC ∆ ICC Min. 4.5 to 5.5 4.5 to 5.5 Low Level Input Voltage VOH TA = 25°C VCC (V) High Level Input Voltage Value Typ. Max. 2.0 -40 to 85°C -55 to 125°C Min. Min. Max. 2.0 0.8 4.4 4.5 4.4 4.4 IO=-4.0 mA 4.18 4.31 4.13 4.10 0.1 IO=4.0 mA 0.17 0.26 5.5 VI = VCC or GND ± 0.1 5.5 VI = VCC or GND 4 5.5 Per Input pin VI = 0.5V or VI = 2.4V Other Inputs at VCC or GND IO = 0 0.1 r P e let 2.0 o s b V (s) ct u d o 0.33 V 0.8 IO=-20 µA 0.0 Max. 2.0 0.8 IO=20 µA Unit 0.1 0.40 V V ±1 ±1 µA 40 80 µA 2.9 3.0 mA O ) * : Applicable only to DIR, G, G input s ( t c AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns) du Test Condition ro Symbol Parameter let P e tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time (A, B - Y) tPLH tPHL Propagation Delay Time (SELECT - Y) tPLH tPHL Propagation Delay Time (STROBE -Y) so b O 4/9 VCC (V) Value TA = 25°C Min. -40 to 85°C -55 to 125°C Min. Min. Max. Unit Typ. Max. Max. 4.5 8 15 19 22 ns 4.5 16 25 31 38 ns 4.5 19 30 38 45 ns 4.5 17 27 34 41 ns M74HCT157 CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter Value TA = 25°C VCC (V) Min. Typ. Max. 10 CIN Input Capacitance 5.0 5 CPD Power Dissipation Capacitance (note 1) 5.0 50 -40 to 85°C -55 to 125°C Min. Min. Max. 10 Unit Max. 10 pF pF 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x f IN + ICC/4(per channel) ) s ( ct TEST CIRCUIT u d o r P e t e l o ) (s s b O t c u d o r CL = 50pF or equivalent (includes jig and probe capacitance) RT = ZOUT of pulse generator (typically 50Ω) P e WAVEFORM : PROPAGATION DELAY TIMES (f=1MHz; 50% duty cycle) t e l o s b O 5/9 M74HCT157 Plastic DIP-16 (0.25) MECHANICAL DATA mm. inch DIM. MIN. a1 0.51 B 0.77 TYP MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D ) s ( ct 20 E 8.5 e 2.54 e3 17.78 u d o 0.335 7.1 I 5.1 s ( t c 1.27 e t e ol bs O ) 3.3 Z Pr 0.100 F L 0.787 0.700 0.280 0.201 0.130 0.050 u d o r P e t e l o s b O P001C 6/9 M74HCT157 SO-16 MECHANICAL DATA mm. DIM. MIN. TYP A inch MAX. MIN. TYP. a1 1.75 MAX. 0.1 0.068 0.2 a2 0.003 0.007 1.65 0.064 b 0.35 0.46 0.013 b1 0.19 0.25 0.007 C 0.5 0.018 ) s ( ct 0.010 0.019 c1 45° (typ.) D 9.8 10 0.385 E 5.8 6.2 0.228 e 1.27 e3 8.89 F 3.8 4.0 4.6 5.3 L 0.5 ) (s e t e l so b O 1.27 S Pr 0.393 0.244 0.050 G M u d o 0.62 0.350 0.149 0.157 0.181 0.208 0.019 0.050 0.024 8° (max.) t c u d o r P e t e l o s b O PO13H 7/9 M74HCT157 TSSOP16 MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 c 0.09 0.20 0.004 D 4.9 5 5.1 0.193 E 6.2 6.4 6.6 0.244 E1 4.3 4.4 4.48 1 e bs 0.65 BSC K 0° L 0.45 let o s b 0.60 s ( t c 0.75 du ro P e 0.0089 0.197 0.201 0.252 0.260 0.173 0.176 0.0256 BSC 0° 8° 0.018 0.024 0.030 u d o r P e A O ) 8° 0.012 t e l o 0.169 ) s ( ct A2 A1 b O e K c L E D E1 PIN 1 IDENTIFICATION 1 0080338D 8/9 M74HCT157 ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. © The ST logo is a registered trademark of STMicroelectronics © 2001 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom © http://www.st.com 9/9