![](/html/69/6959/69591412dd3650d55c05c51e9b5e403d9e59a7336f9de5d25479bc75a0aa73fe/bg1.png)
M74HC126
QUAD BUS BUFFER (3-STATE)
■ HIGH SPEED:
t
= 8ns (TYP.) at VCC = 6V
PD
■ LOW POWER DISSIPATION:
I
= 4µA(MAX.) at TA=25°C
CC
■ HIGH NOISE IMMUNITY:
V
= V
NIH
■ SYMMETRICAL OUTPUT IMPEDANCE:
|I
| = IOL = 6mA (MIN)
OH
■ BALANCED PROPAGATION DELAYS:
t
≅ t
PLH
■ WIDE OPERATING VOLTAGE RANGE:
V
(OPR) = 2V to 6V
CC
■ PIN AND FUNCTION COMPATIBLE WITH
= 28 % VCC (MIN.)
NIL
PHL
74 SERIES 126
DESCRIPTION
The M74HC126 is an high speed CMOS QUAD
BUFFER (3-STATE) fabricated with silicon gate
2
MOS technology.
C
The device requires the 3-STATE control input G
to be set high to pla ce the output into the high
impedance state.
TSSOPDIP SOP
ORDER CODES
PACKAGE TUBE T & R
DIP M74HC126B1R
SOP M74HC126M1R M74HC126RM13TR
TSSOP M74HC126TTR
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
1/10August 2001
![](/html/69/6959/69591412dd3650d55c05c51e9b5e403d9e59a7336f9de5d25479bc75a0aa73fe/bg2.png)
M74HC126
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION
1, 4, 10, 13 1G TO 4G Output Enable Input
2, 5, 9, 12 1A TO 4A Data Inputs
3, 6, 8, 11 1Y TO 4Y Data Outputs
7 GND Ground (0V)
14
V
CC
TRUTH TABLE
AGY
XLZ
LHL
HHH
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
I
I
OK
I
I
or I
CC
P
T
T
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
Supply Voltage
CC
DC Input Voltage -0.5 to VCC + 0.5
I
DC Output Voltage -0.5 to VCC + 0.5
O
DC Input Diode Current
IK
DC Output Diode Current
DC Output Current
O
DC VCC or Ground Current
GND
Power Dissipation
D
Storage Temperature
stg
Lead Temperature (10 sec)
L
°C; derate to 300mW by 10mW/°C from 65°C to 85°C
Positive Supply Voltage
-0.5 to +7 V
V
V
± 20 mA
± 20 mA
± 35 mA
± 70 mA
500(*) mW
-65 to +150 °C
300 °C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value Unit
2/10
V
V
V
T
t
r
Supply Voltage
CC
Input Voltage 0 to V
I
Output Voltage 0 to V
O
Operating Temperature
op
Input Rise and Fall Time VCC = 2.0V
, t
f
V
V
CC
CC
= 4.5V
= 6.0V
2 to 6 V
CC
CC
-55 to 125 °C
0 to 1000 ns
0 to 500 ns
0 to 400 ns
V
V
![](/html/69/6959/69591412dd3650d55c05c51e9b5e403d9e59a7336f9de5d25479bc75a0aa73fe/bg3.png)
DC SPECIFICATIONS
Symbol Parameter
V
V
V
V
I
I
High Level Input
IH
Voltage
Low Level Input
IL
Voltage
High Level Output
OH
Voltage
Low Level Output
OL
Voltage
I
Input Leakage
I
Current
High Impedance
OZ
Output Leakage
Current
Quiescent Supply
CC
Current
M74HC126
Test Condition Value
T
= 25°C
V
CC
(V)
A
Min. Typ. Max. Min. Max. Min. Max.
2.0 1.5 1.5 1.5
6.0 4.2 4.2 4.2
2.0 0.5 0.5 0.5
6.0 1.8 1.8 1.8
2.0
4.5
6.0
4.5
6.0
2.0
4.5
6.0
4.5
6.0
6.0
6.0
6.0
IO=-20 µA
I
=-20 µA
O
I
=-20 µA
O
I
=-6.0 mA
O
I
=-7.8 mA
O
IO=20 µA
I
=20 µA
O
I
=20 µA
O
I
=6.0 mA
O
I
=7.8 mA
O
= VCC or GND
V
I
= VIH or V
V
I
IL
VO = VCC or GND
= VCC or GND
V
I
1.9 2.0 1.9 1.9
4.4 4.5 4.4 4.4
5.9 6.0 5.9 5.9
4.18 4.31 4.13 4.10
5.68 5.8 5.63 5.60
0.0 0.1 0.1 0.1
0.0 0.1 0.1 0.1
0.0 0.1 0.1 0.1
0.17 0.26 0.33 0.40
0.18 0.26 0.33 0.40
-40 to 85°C -55 to 125°C
± 0.1 ± 1 ± 1 µA
± 0.5 ± 5 ± 10 µA
44080µA
Unit
V4.5 3.15 3.15 3.15
V4.5 1.35 1.35 1.35
V
V
3/10