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1 DUAL 4 CHANNEL MULTIPLEXER 3 STATE OUTPUT HIGH SPEED: t PD = 16ns (TYP.) at V CC = 6V LOW POWER DISSIPATION: I CC = 4µA(MAX.) at T A =25 C HIGH NOISE IMMUNITY: V NIH = V NIL = 28 % V CC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE: I OH = I OL = 4mA (MIN) BALANCED PROPAGATION DELAYS: t PLH t PHL WIDE OPERATING VOLTAGE RANGE: V CC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 253 DESCRIPTION The M74HC253 is an high speed CMOS DUAL 4 CHANNEL MULTIPLEXER fabricated with silicon gate C 2 MOS technology. Each of these data (1C0-1C3, 2C0-2C3) is selected by the two address inputs A and B. Separate strobe inputs (1G, 2G) are provided for each of the two four-line sections. The strobe input PIN CONNECTION AND IEC LOGIC SYMBOLS ORDER CODES TSSOP PACKAGE TUBE T & R DIP M74HC253B1R SOP M74HC253M1R M74HC253RM13TR TSSOP M74HC253TTR (ng) can be used to inhibit the data output; the output of M74HC253 is a high impedance while the strobe input is held high. All inputs are equipped with protection circuits against static discharge and transient excess voltage. DIP SOP July /11

2 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE PIN No SYMBOL NAME AND FUNCTION 1, 15 1G, 2G Output Enable Inputs 14, 2 A, B Common Data Select Inputs 6, 5, 4, 3 1C0 to 1C3 Data Inputs From Source 1 7, 9 1Y, 2Y 3 State Multiplexer Outputs 10, 11, 12, 13 2C0 to 2C3 Data Inputs From Source 2 8 GND Ground (0V) 16 V CC Positive Supply Voltage SELECT INPUTS DATA INPUTS STROBE B A C 0 C 1 C 2 C 3 G OUTPUT Y X X X X X X H Z L L L X X X L L L L H X X X L H L H X L X X L L L H X H X X L H H L X X L X L L H L X X H X L H H H X X X L L L H H X X X H L H X : Don t Care Z : High Impedance 2/11

3 LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V CC Supply Voltage -0.5 to +7 V V I DC Input Voltage -0.5 to V CC V V O DC Output Voltage -0.5 to V CC V I IK DC Input Diode Current ± 20 ma I OK DC Output Diode Current ± 20 ma I O DC Output Current ± 25 ma I CC or I GND DC V CC or Ground Current ± 50 ma P D Power Dissipation 500(*) mw T stg Storage Temperature -65 to +150 C T L Lead Temperature (10 sec) 300 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 3/11

4 RECOMMENDED OPERATING CONDITIONS Symbol Parameter Value Unit V CC Supply Voltage 2 to 6 V V I Input Voltage 0 to V CC V V O Output Voltage 0 to V CC V T op Operating Temperature -55 to 125 C t r, t f V CC = 4.5V 0 to 500 ns Input Rise and Fall Time V CC = 2.0V 0 to 1000 ns V CC = 6.0V 0 to 400 ns DC SPECIFICATIONS Symbol V IH V IL V OH V OL I I Parameter High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Voltage Input Leakage Current High Impedance Output Leakage Current Quiescent Supply Current V CC (V) Test Condition Value T A = 25 C -40 to 85 C -55 to 125 C Min. Typ. Max. Min. Max. Min. Max I O =-20 µa I O =-20 µa I O =-20 µa I O =-4.0 ma I O =-5.2 ma I O =20 µa I O =20 µa I O =20 µa I O =4.0 ma I O =5.2 ma V I = V CC or GND ± 0.1 ± 1 ± 1 µa I OZ I CC 6.0 V I = V IH or V IL V O = V CC or GND Unit ± 0.5 ± 5 ± 5 µa 6.0 V I = V CC or GND µa V V V V 4/11

5 AC ELECTRICAL CHARACTERISTICS (C L = 50 pf, Input t r = t f = 6ns) Test Condition Value Symbol t TLH t THL t PLH t PHL t PLH t PHL t PZL t PZH t PLZ t PHZ Parameter Output Transition Time Propagation Delay Time (Cn - Y) Propagation Delay Time (A, B - Y) High Impedance Output Enable Time (G - Y) High Impedance Output Disable Time (G - Y) V CC (V) CAPACITIVE CHARACTERISTICS T A = 25 C -40 to 85 C -55 to 125 C Min. Typ. Max. Min. Max. Min. Max R 1 = 1KΩ R 1 = 1KΩ Test Condition C PD Power Dissipation Capacitance (note pf 1) 1) C PD 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. I CC(opr) = C PD x V CC x f IN + I CC /4(per circuit) Value Symbol Parameter T V A = 25 C -40 to 85 C -55 to 125 C Unit CC (V) Min. Typ. Max. Min. Max. Min. Max. C IN Input Capacitance pf Unit ns ns ns ns ns 5/11

6 TEST CIRCUIT t PLH, t PHL t PZL, t PLZ TEST t PZH, t PHZ C L = 50pF/150pF or equivalent (includes jig and probe capacitance) R 1 = 1KΩ or equivalent R T = Z OUT of pulse generator (typically 50Ω) SWITCH Open V CC GND 6/11

7 WAVEFORM 1 : PROPAGATION DELAY TIMES (f=1mhz; 50% duty cycle) WAVEFORM 2:OUTPUT ENABLE AND DISABLE TIME (f=1mhz; 50% duty cycle) 7/11

8 Plastic DIP-16 (0.25) MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. a B b b D E e e F I L Z P001C 8/11

9 SO-16 MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A a a b b C c1 45 (typ.) D E e e F G L M S 8 (max.) PO13H 9/11

10 TSSOP16 MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A A A b c D E E e 0.65 BSC BSC K L A A2 A1 b e D c K L E E1 PIN 1 IDENTIFICATION D 10/11

11 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 11/11

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