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M54HC237 M74HC237
3 TO 8 LINE DECODER LATCH
.HI .LOWPOWERDI .HI .OUTPUTDRI .SYMMETRI .BALANCEDPROPAGATI .WI .PI
GH SPEED tPD = 12 ns (TYP.) at VCC = 5 V SSIPATION ICC = 4 A (MAX.) AT TA = 25 C 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 54/74LS237
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
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M54/M74HC237
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 1, 2, 3 4 5 6 15, 14, 13, 12, 11, 10, 9, 7 8 16 SYMBOL A, B, C GL G2 G1 Y0 to Y7 NAME AND FUNCTION Data Inputs Latch Enable Input (Active LOW) Data Enable Input (Active LOW) Data Enable Input (Active HIGH) Decoder Outputs
GND VCC
Ground (0V) Positive Supply Voltage
IEC LOGIC SYMBOLS
TRUTH TABLE
INPUTS ENABLE GL X X L L L L L L L L H G2 X H L L L L L L L L L G1 L X H H H H H H H H H C X X L L L L H H H H X SELECT B X X L L H H L L H H X A X X L H L H L H L H X Y0 L L H L L L L L L L Y1 L L L H L L L L L L Y2 L L L L H L L L L L OUTPUS Y3 L L L L L H L L L L Y4 L L L L L L H L L L Y5 L L L L L L L H L L Y6 L L L L L L L L H L Y7 L L L L L L L L L H
OUTPUT CORRESPONDING TO STORED ADDRESS, H: ALL OTHERS, L
X: Don't Care
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M54/M74HC237
LOGIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI VO IIK IOK IO ICC or IGND PD Tstg TL 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) Parameter 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
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M54/M74HC237
RECOMMENDED OPERATING CONDITIONS
Symbol VCC VI VO Top tr, tf Supply Voltage Input Voltage Output Voltage Operating Temperature: M54HC Series M74HC Series Input Rise and Fall Time Parameter 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 C ns
o o
VCC = 2 V VCC = 4.5 V VCC = 6 V
DC SPECIFICATIONS
Test Conditions Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 4.5 6.0 VOL Low Level Output Voltage 2.0 4.5 6.0 4.5 6.0 II ICC Input Leakage Current Quiescent Supply Current 6.0 6.0 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 4 TA = 25 oC 54HC and 74HC Min. 1.5 3.15 4.2 0.5 1.35 1.8 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 VI = VCC or GND 1.9 4.4 5.9 4.13 5.63 0.1 0.1 0.1 0.33 0.33 1 40 Typ. Max. Value -40 to 85 oC -55 to 125 oC 74HC 54HC Min. 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 80 A A V V Max. Min. 1.5 3.15 4.2 0.5 1.35 1.8 V Max. V Unit
VIH
High Level Input Voltage Low Level Input Voltage High Level Output Voltage
V IL
V OH
4/11
M54/M74HC237
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 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 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
tTLH tTHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tW(L)
Output Transition Time Propagation Delay Time (A, B, C - Y) Propagation Delay Time (G1 - Y) Propagation Delay Time (G2 - Y) Propagation Delay Time (GL - Y) Minimum Pulse Width (GL) Minimum Set-up Time (A, B, C - GL) Minimum Hold Time (A, B, C - GL) Input Capacitance Power Dissipation Capacitance
ns
ns
ns
ns
ns
ns
ts
ns
th
ns pF pF
CIN CPD (*)
(*) 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.
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M54/M74HC237
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/M74HC237
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
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M54/M74HC237
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/M74HC237
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/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. (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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