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M74HC237

ST Microelectronics
Part Number M74HC237
Manufacturer ST Microelectronics
Description 3 TO 8 LINE DECODER LATCH
Published May 6, 2005
Detailed Description M74HC237 3 TO 8 LINE DECODER LATCH s HIGH SPEED: tPD = 16ns (TYP.) at VCC = 6V s LOW POWER DISSIPATION: ICC = 4µA(M...
Datasheet PDF File M74HC237 PDF File

M74HC237
M74HC237

Overview
M74HC237 3 TO 8 LINE DECODER LATCH s HIGH SPEED: tPD = 16ns (TYP.
) at VCC = 6V s LOW POWER DISSIPATION: ICC = 4µA(MAX.
) at TA=25°C s HIGH NOISE IMMUNITY: )VNIH = VNIL = 28 % VCC (MIN.
) t(ss SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) ucs BALANCED PROPAGATION DELAYS: dtPLH ≅ tPHL ro )s WIDE OPERATING VOLTAGE RANGE: P t(sVCC (OPR) = 2V to 6V s PIN AND FUNCTION COMPATIBLE WITH lete uc74 SERIES 237 so rodDESCRIPTION b PThe M74HC237 is an high speed CMOS 3 TO 8 LINE DECODER fabricated with silicon gate - O teC2MOS technology.
) leWhen GL goes from low to high, the address t(s opresent at the select inputs (A, B, C) is stored in sthe latches.
As long as GL remains high no c baddress changes will be recognized.
Output u Oenable controls, G1 and G2 control the state of the d -outputs independently of the select or DIP SOP TSSOP ORDER CODES PACKAGE TUBE DIP SOP TSSOP M74HC237B1R M74HC237M1R T&R M74HC237RM13TR M74HC237TTR latch-enable inputs.
All of the outputs are low unless G1 is high and G2 is low.
The M74HC237 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.
OObbssoolleettee PPrrooduct(s)PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/11 M74HC237 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 1, 2, 3 A, B, C Data Inputs 4 GL Latch Enable Input 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 GND Ground (0V) )16 VCC Positive Supply Voltage ct(sTRUTH TABLE duINPUTS Pro t(s)ENABLE te cGL G2 le uX X so rodX H LL b PL L - O teL L ) leL L t(s oL L sL L c bL L du - OL L ro )H L OObbssoolleettee PProduct(sX:Don’tCare 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 OUTPUTS Y0 Y1 Y2 Y3 Y4...


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