M54HC237 M74HC237 3 TO 8 LINE DECODER LATCH . . . . . . . . HIGH SPEED tPD = 12 ns (TYP.) at VCC = 5 V LOW POWER DISSIPATION ICC = 4 µA (MAX.) AT TA = 25 °C HIGH NOISE IMMUNITY VNIH = VNIL = 28 % VCC (MIN.) OUTPUT DRIVE CAPABILITY 10 LSTTL LOADS SYMMETRICAL OUTPUT IMPEDANCE IOH = IOL = 4 mA (MIN.) BALANCED PROPAGATION DELAYS tPLH = tPHL WIDE OPERATING VOLTAGE RANGE VCC (OPR) = 2 V TO 6 V PIN AND FUNCTION COMPATIBLE WITH 54/74LS237 B1R (Plastic Package) F1R (Ceramic Package) M1R (Micro Package) C1R (Chip Carrier) ORDER CODES : M54HC237F1R M74HC237M1R M74HC237B1R M74HC237C1R PIN CONNECTIONS (top view) DESCRIPTION The M54/74HC237 is a high speed CMOS 3 TO 8 LINE DECODER LATCH fabricated in silicon gate C2MOS technology. It has the same high speed performance of LSTTL combined with true CMOS low power consumption. When GL goes from low to high, the address present at the select inputs (A, B, C) is stored in the latches. As long as GL remains high no address changes will be recognized. Output enable controls, G1 and G2 control the state of the outputs independantly of the select or latch-enable inputs. All of the outputs are low unless G1 is high and G2 is low. The ’HC237 is ideally suited for the implementation of glitch-free decoders in stored-address applications in bus oriented systems. All inputs are equipped with protection circuits against static discharge and transient excess voltage. October 1992 NC = No Internal Connection 1/11 M54/M74HC237 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL 1, 2, 3 4 A, B, C GL NAME AND FUNCTION Data Inputs Latch Enable Input (Active LOW) 5 G2 Data Enable Input (Active LOW) 6 G1 Data Enable Input (Active HIGH) 15, 14, 13, 12, 11, 10, 9, 7 Y0 to Y7 Decoder Outputs 8 16 GND VCC Ground (0V) Positive Supply Voltage IEC LOGIC SYMBOLS TRUTH TABLE INPUTS ENABLE GL G2 OUTPUS SELECT G1 C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X X L X X X L L L L L L L L X H X X X X L L L L L L L L L L L L H H L L L L L H H L L H L L L L L L L L L L L L L L H L H L L L H L L L L L L L L L H H L H H L H L L L L L L L H L L H L L L L L L L L H H L H L L L L L H L L L L L L H H H H H H L H L L L L L L L L L L L L H L L H H L H X X X X: Don’t Care 2/11 OUTPUT CORRESPONDING TO STORED ADDRESS, H: ALL OTHERS, L M54/M74HC237 LOGIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit -0.5 to +7 V -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 V V DC Input Diode Current ± 20 mA DC Output Diode Current DC Output Source Sink Current Per Output Pin ± 20 ± 25 mA mA VCC Supply Voltage VI VO DC Input Voltage DC Output Voltage IIK IOK IO ICC or IGND DC VCC or Ground Current PD Power Dissipation Tstg Storage Temperature TL Lead Temperature (10 sec) ± 50 mA 500 (*) mW -65 to +150 o C 300 o 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 3/11 M54/M74HC237 RECOMMENDED OPERATING CONDITIONS Symbol Parameter VCC VI Supply Voltage Input Voltage VO Output Voltage Top Operating Temperature: M54HC Series M74HC Series Input Rise and Fall Time tr, tf Value Unit 2 to 6 0 to VCC V V 0 to VCC V o -55 to +125 -40 to +85 0 to 1000 VCC = 2 V VCC = 4.5 V 0 to 500 VCC = 6 V 0 to 400 C C ns o DC SPECIFICATIONS Test Conditions Symbol VIH V IL V OH Parameter High Level Input Voltage Low Level Input Voltage High Level Output Voltage VCC (V) 2.0 Min. 1.5 4.5 3.15 6.0 2.0 4.2 Low Level Output Voltage 6.0 2.0 ICC 4/11 Quiescent Supply Current Min. 1.5 Max. 3.15 Min. 1.5 4.2 4.2 0.5 0.5 1.35 1.35 1.35 1.8 2.0 1.9 1.9 4.4 4.4 4.4 6.0 5.9 5.9 4.5 4.18 4.31 4.13 4.10 6.0 IO=-5.2 mA 5.68 5.8 6.0 6.0 5.63 V 1.8 1.9 4.5 2.0 4.5 V 0.5 1.8 Unit Max. 3.15 5.9 4.5 6.0 Input Leakage Current Max. -40 to 85 oC -55 to 125 oC 74HC 54HC VI = IO=-20 µA VIH or V IL IO=-4.0 mA 4.5 6.0 II Typ. 4.5 6.0 VOL Value TA = 25 oC 54HC and 74HC V 5.60 0.0 0.0 0.1 0.1 0.1 0.1 0.1 0.1 0.0 0.1 0.1 0.1 0.17 0.18 0.26 0.26 0.33 0.33 0.40 0.40 VI = VCC or GND ±0.1 ±1 ±1 µA VI = VCC or GND 4 40 80 µA VI = IO= 20 µA VIH or V IL IO= 4.0 mA IO= 5.2 mA V M54/M74HC237 AC ELECTRICAL CHARACTERISTICS (C L = 50 pF, Input t r = tf = 6 ns) Test Conditions Symbol Parameter VCC (V) tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time (A, B, C - Y) tPLH tPHL Propagation Delay Time (G1 - Y) tPLH tPHL Propagation Delay Time (G2 - Y) tPLH tPHL Propagation Delay Time (GL - Y) tW(L) Minimum Pulse Width (GL) 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 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 ts th CIN CPD (*) Minimum Set-up Time (A, B, C - GL) Minimum Hold Time (A, B, C - GL) Input Capacitance Power Dissipation Capacitance TA = 25 oC 54HC and 74HC Min. Typ. Max. 30 75 8 15 7 13 60 180 19 36 16 31 45 140 15 28 13 24 45 140 15 28 13 24 65 190 21 38 18 32 10 75 6 15 6 13 12 50 3 10 2 9 25 5 5 5 10 52 Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. Max. Min. Max. 95 115 19 22 16 19 225 270 45 54 38 46 175 210 35 42 30 36 175 210 35 42 30 36 240 285 48 57 41 48 95 110 19 22 16 19 65 75 13 15 11 13 30 40 6 8 5 7 10 10 Unit ns ns ns ns ns ns ns 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. SWITCHING CHARACTERISTICS TEST WAVEFORM 5/11 M54/M74HC237 TEST CIRCUIT ICC (Opr.) INPUT TRANSITION TIME IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICS TEST. 6 Line to 64 Line Decoder with Input Address Storage. 6/11 M54/M74HC237 Plastic DIP16 (0.25) MECHANICAL DATA mm DIM. MIN. a1 0.51 B 0.77 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 F 7.1 0.280 I 5.1 0.201 L Z 3.3 0.130 1.27 0.050 P001C 7/11 M54/M74HC237 Ceramic DIP16/1 MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 20 0.787 B 7 0.276 D E 3.3 0.130 0.38 e3 0.015 17.78 0.700 F 2.29 2.79 0.090 0.110 G 0.4 0.55 0.016 0.022 H 1.17 1.52 0.046 0.060 L 0.22 0.31 0.009 0.012 M 0.51 1.27 0.020 0.050 N P Q 10.3 7.8 8.05 5.08 0.406 0.307 0.317 0.200 P053D 8/11 M54/M74HC237 SO16 (Narrow) MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.2 a2 MAX. 0.004 0.007 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45° (typ.) D 9.8 E 5.8 10 0.385 6.2 0.228 0.393 0.244 e 1.27 0.050 e3 8.89 0.350 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 0.62 0.024 8° (max.) P013H 9/11 M54/M74HC237 PLCC20 MECHANICAL DATA mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 9.78 10.03 0.385 0.395 B 8.89 9.04 0.350 0.356 D 4.2 4.57 0.165 0.180 d1 2.54 0.100 d2 0.56 0.022 E 7.37 8.38 0.290 0.330 e 1.27 0.050 e3 5.08 0.200 F 0.38 0.015 G 0.101 0.004 M 1.27 0.050 M1 1.14 0.045 P027A 10/11 M54/M74HC237 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. 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