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| M54HC251 M74HC251 8 BIT SIPO SHIFT REGISTER .HI .LOWPOWERDI .HI .OUTPUTDRI .SYMMETRI .BALANCEDPROPAGATI .WI .PI GH SPEED tPD = 14 ns (TYP.) AT VCC = 5 V SSIPATION ICC = 4 A (MAX.) AT TA = 25 C 6 V GH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) VE CAPABILITY 10 LSTTL LOADS CAL OUTPUT IMPEDANCE IOH = IOL = 4 mA (MIN.) ON DELAYS tPLH = tPHL DE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V N AND FUNCTION COMPATIBLE WITH 54/74LS251 B1R (Plastic Package) F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) ORDER CODES : M54HC251F1R M74HC251M1R M74HC251B1R M74HC251C1R DESCRIPTION The M54/74HC251 is a high speed CMOS 8-CHANNEL MULTIPLEXER (3-STATE) fabricated in silicon 2 gate C MOS technology. It has the same high speed performance of LSTTL combined with true CMOS low power consumption. This multiplexer features both true (Y) and complement (W) outputs as well as STROBE input. The STROBE must be a low logic level to enable this device. When the STROBE input is high, both outputs are in the high impedance state. When enabled, address information on the data select inputs determines which data input is routed to Y and W. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTIONS (top view) INPUT AND OUTPUT EQUIVALENT CIRCUIT NC = No Internal Connection February 1993 1/11 M54/M74HC251 TRUTH TABLE INPUTS C X L L L L H H H H X: Don't Care Z: HIGH Impedance OUTPUS A X L H L H L H L H STROBE S H L L L L L L L L Y Z D0 D1 D2 D3 D4 D5 D6 D7 W Z D0 D1 D2 D3 D4 D5 D6 D7 B X L L H H L L H H LOGIC DIAGRAM 2/11 M54/M74HC251 PIN DESCRIPTION PIN No 4, 3, 2, 1, 15, 14, 13, 12 5 6 7 11, 10, 9 8 16 SYMBOL D0 to D7 NAME AND FUNCTION Multiplexer Inputs IEC LOGIC SYMBOL Y W STROBE A, B, C GND V CC Multiplexer Output Complementary Multiplexer Output 3 State Output Enable Input Select Inputs Ground (0V) Positive Supply Voltage ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO ICC or IGND PD Tstg TL Parameter Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Source Sink Current Per Output Pin DC VCC or Ground Current Power Dissipation Storage Temperature Lead Temperature (10 sec) Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 20 25 50 500 (*) -65 to +150 300 Unit V V V mA mA mA mA mW o o C C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied. (*) 500 mW: 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC RECOMMENDED OPERATING CONDITIONS Symbol VCC VI VO Top tr, tf Parameter Supply Voltage Input Voltage Output Voltage Operating Temperature: M54HC Series M74HC Series Input Rise and Fall Time VCC = 2 V VCC = 4.5 V VCC = 6 V Value 2 to 6 0 to VCC 0 to VCC -55 to +125 -40 to +85 0 to 1000 0 to 500 0 to 400 Unit V V V C o C o ns 3/11 M54/M74HC251 DC SPECIFICATIONS Test Conditions Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 V OH High Level Output Voltage 2.0 4.5 6.0 4.5 VOL Low Level Output Voltage 6.0 2.0 4.5 6.0 4.5 6.0 II IOZ ICC Input Leakage Current 3 State Output Off State Current Quiescent Supply Current 6.0 6.0 VI = IO=-20 A VIH or V IL IO=-4.0 mA IO=-5.2 mA VI = IO= 20 A VIH or V IL IO= 4.0 mA IO= 5.2 mA VI = VCC or GND 1.9 4.4 5.9 4.18 5.68 2.0 4.5 6.0 4.31 5.8 0.0 0.0 0.0 0.17 0.18 0.1 0.1 0.1 0.26 0.26 0.1 0.5 4 TA = 25 oC 54HC and 74HC Min. Typ. Max. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.13 5.63 0.1 0.1 0.1 0.33 0.33 1 5.0 40 Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. Min. Max. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.10 5.60 0.1 0.1 0.1 0.40 0.40 1 10 80 A A A V V 1.5 3.15 4.2 0.5 1.35 1.8 V V Unit VIH High Level Input Voltage Low Level Input Voltage V IL VI = VIH or VIL VO = VCC or GND 6.0 VI = VCC or GND 4/11 M54/M74HC251 AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns) Test Conditions Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 TA = 25 C 54HC and 74HC Min. Typ. 30 8 7 64 16 14 80 20 17 36 11 9 26 13 11 5 62 Max. 75 15 13 130 26 22 160 32 27 90 18 15 85 17 14 10 o Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. 95 19 16 165 33 28 200 40 34 115 23 20 105 21 18 10 Min. Max. 110 22 19 195 39 33 240 48 41 135 27 23 130 26 22 10 Unit tTLH tTHL tPLH tPHL tPLH tPHL tPZL tPZH tPLZ tPHZ CIN CPD (*) Output Transition Time Propagation Delay Time (D - Y, W) Propagation Delay Time (A, B, C - Y, W) Output Enable Time Output Disable Time Input Capacitance Power Dissipation Capacitance ns ns ns RL = 1 K ns RL = 1 K ns pF pF (*) 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 operting current can be obtained by the following equation. ICC(opr) = CPD *VCC *fIN + ICC TEST WAVEFORM ICC (Opr.) * INPUT WAVEFORM TIME IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICS TEST. 5/11 M54/M74HC251 SWITCHING CHARACTERISTICS TEST WAVEFORM 6/11 M54/M74HC251 Plastic DIP16 (0.25) MECHANICAL DATA mm MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.27 8.5 2.54 17.78 7.1 5.1 0.130 0.050 0.51 0.77 0.5 0.25 20 0.335 0.100 0.700 0.280 0.201 1.65 TYP. MAX. MIN. 0.020 0.030 0.020 0.010 0.787 0.065 inch TYP. MAX. DIM. P001C 7/11 M54/M74HC251 Ceramic DIP16/1 MECHANICAL DATA mm MIN. A B D E e3 F G H L M N P Q 7.8 2.29 0.4 1.17 0.22 0.51 0.38 17.78 2.79 0.55 1.52 0.31 1.27 10.3 8.05 5.08 0.307 0.090 0.016 0.046 0.009 0.020 3.3 0.015 0.700 0.110 0.022 0.060 0.012 0.050 0.406 0.317 0.200 TYP. MAX. 20 7 0.130 MIN. inch TYP. MAX. 0.787 0.276 DIM. P053D 8/11 M54/M74HC251 SO16 (Narrow) MECHANICAL DATA DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 9.8 5.8 1.27 8.89 4.0 5.3 1.27 0.62 8 (max.) 0.149 0.181 0.019 10 6.2 0.35 0.19 0.5 45 (typ.) 0.385 0.228 0.050 0.350 0.157 0.208 0.050 0.024 0.393 0.244 0.1 mm TYP. MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.004 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010 P013H 9/11 M54/M74HC251 PLCC20 MECHANICAL DATA mm MIN. A B D d1 d2 E e e3 F G M M1 1.27 1.14 7.37 1.27 5.08 0.38 0.101 0.050 0.045 9.78 8.89 4.2 2.54 0.56 8.38 0.290 0.050 0.200 0.015 0.004 TYP. MAX. 10.03 9.04 4.57 MIN. 0.385 0.350 0.165 0.100 0.022 0.330 inch TYP. MAX. 0.395 0.356 0.180 DIM. P027A 10/11 M54/M74HC251 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A 11/11 |
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