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M74HCT126
QUAD BUS BUFFER (3-STATE)
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HIGH SPEED: tPD = 13ns (TYP.) at VCC = 4.5V LOW POWER DISSIPATION: ICC = 4A(MAX.) at TA=25C COMPATIBLE WITH TTL OUTPUTS : VIH = 2V (MIN.) VIL = 0.8V (MAX) BALANCED PROPAGATION DELAYS: tPLH tPHL SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 6mA (MIN) PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 126 ORDER CODES
PACKAGE DIP SOP TSSOP TUBE M74HCT126B1R M74HCT126M1R T&R M74HCT126RM13TR M74HCT126TTR DIP SOP TSSOP
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DESCRIPTION The M74HCT126 is an high speed CMOS QUAD BUFFER (3-STATE) fabricated with silicon gate C2MOS technology. The device requires the 3-STATE control input G to be set low to place the output in to the high impedance state. The M74HCT126 is designed to directly interface HSC2MOS systems with TTL and NMOS components. All inputs are equipped with protection circuits against static discharge and transient excess voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
August 2001
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M74HCT126
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 1, 4, 10, 13 2, 5, 9, 12 3, 6, 8, 11 7 14 SYMBOL 1G TO 4G 1A TO 4A 1Y TO 4Y GND VCC NAME AND FUNCTION Output Enable Input Data Inputs Data Outputs Ground (0V) Positive Supply Voltage
TRUTH TABLE
A X L H G L H H Y Z L H
ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI VO IIK IOK IO PD Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output 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 35 70 500(*) -65 to +150 300 Unit V V V mA mA mA mA mW C C
ICC or IGND DC VCC or Ground Current
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 65C to 85C
RECOMMENDED OPERATING CONDITIONS
Symbol VCC VI VO Top tr, tf Supply Voltage Input Voltage Output Voltage Operating Temperature Input Rise and Fall Time (VCC = 4.5 to 5.5V) Parameter Value 4.5 to 5.5 0 to VCC 0 to VCC -55 to 125 0 to 500 Unit V V V C ns
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M74HCT126
DC SPECIFICATIONS
Test Condition Symbol Parameter VCC (V) 4.5 to 5.5 4.5 to 5.5 4.5 4.5 5.5 5.5 5.5 5.5 IO=-20 A IO=-6.0 mA IO=20 A IO=6.0 mA VI = VCC or GND VI = VIH or VIL VO = VCC or GND VI = VCC or GND Per Input pin VI = 0.5V or VI = 2.4V Other Inputs at VCC or GND IO = 0 TA = 25C Min. 2.0 Typ. Max. Value -40 to 85C Min. 2.0 Max. -55 to 125C Min. 2.0 Max. V Unit
VIH
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 Additional Worst Case Supply Current
VIL
0.8 4.4 4.18 4.5 4.31 0.0 0.17 0.1 0.26 0.1 0.5 4 2.0 4.4 4.13
0.8 4.4 4.10 0.1 0.33 1 5 40 2.9
0.8
V
VOH VOL II IOZ
V 0.1 0.40 1 10 80 3.0 V A A A mA
ICC ICC
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
Test Condition Symbol Parameter VCC (V) 4.5 4.5 4.5 4.5 4.5 4.5 CL (pF) 50 50 150 50 150 50 TA = 25C Min. Typ. 7 13 17 15 19 17 Max. 12 21 27 24 30 24 Value -40 to 85C Min. Max. 15 26 34 30 38 30 -55 to 125C Min. Max. 18 32 41 36 45 36 ns ns ns ns Unit
tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time tPZL tPZH Output Enable Time tPLZ tPHZ Output Disable Time
RL = 1 K RL = 1 K
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M74HCT126
CAPACITIVE CHARACTERISTICS
Test Condition Symbol Parameter VCC (V) TA = 25C Min. Typ. 5 56 Max. 10 Value -40 to 85C Min. Max. 10 -55 to 125C Min. Max. 10 pF pF Unit
CIN CPD
Input Capacitance Power Dissipation Capacitance (note 1)
1) 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC
TEST CIRCUIT
TEST tPLH, tPHL tPZL, tPLZ tPZH, tPHZ
CL = 50pF/150pF or equivalent (includes jig and probe capacitance) R1 = 1K or equivalent RT = ZOUT of pulse generator (typically 50))
SWITCH Open VCC GND
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M74HCT126
WAVEFORM 1 : PROPAGATION DELAY TIMES (f=1MHz; 50% duty cycle)
WAVEFORM 2 : OUTPUT ENABLE AND DISABLE TIMES (f=1MHz; 50% duty cycle)
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M74HCT126
Plastic DIP-14 MECHANICAL DATA
mm. DIM. MIN. a1 B b b1 D E e e3 F I L Z 1.27 3.3 2.54 0.050 8.5 2.54 15.24 7.1 5.1 0.130 0.100 0.51 1.39 0.5 0.25 20 0.335 0.100 0.600 0.280 0.201 1.65 TYP MAX. MIN. 0.020 0.055 0.020 0.010 0.787 0.065 TYP. MAX. inch
P001A
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M74HCT126
SO-14 MECHANICAL DATA
DIM. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 8.55 5.8 1.27 7.62 4.0 5.3 1.27 0.68 8 (max.) 0.149 0.181 0.019 8.75 6.2 0.35 0.19 0.5 45 (typ.) 0.336 0.228 0.050 0.300 0.157 0.208 0.050 0.026 0.344 0.244 0.1 mm. MIN. TYP MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.003 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010
PO13G
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M74HCT126
TSSOP14 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.45 0.60 0.05 0.8 0.19 0.09 4.9 6.2 4.3 5 6.4 4.4 0.65 BSC 8 0.75 0 0.018 0.024 1 TYP MAX. 1.2 0.15 1.05 0.30 0.20 5.1 6.6 4.48 0.002 0.031 0.007 0.004 0.193 0.244 0.169 0.197 0.252 0.173 0.0256 BSC 8 0.030 0.004 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.0089 0.201 0.260 0.176 inch
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1
0080337D
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M74HCT126
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. (c) The ST logo is a registered trademark of STMicroelectronics (c) 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 (c) http://www.st.com
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