Features: `HIGH SPEED tPD = 12 ns (TYP.) AT VCC = 5 V
`LOWPOWER DISSIPATION ICC = 4 A (MAX.) AT 25
`OUTPUT DRIVE CAPABILITY15 LSTTL LOADS
`BALANCEDPROPAGATION DELAYS tPLH = tPHL
`SYMMETRICAL OUTPUT IMPEDANCE IOL = IOH = 6 mA (MIN.)
`COMPATIBLE WITH TTL OUTPUTSVIH = 2V (MIN.) VIL = 0.8V (MAX)
` PIN AND FUNCTION COMPATIBLE WITH 54/74LS125/126
Pinout
Specifications
| Symbol |
Parameter |
Value |
Unit |
| VCC |
Supply Voltage |
-0.5 to +7 |
V |
| VI |
DC Input Voltage |
-0.5 to VCC + 0.5 |
V |
| VO |
DC Output Voltage |
-0.5 to VCC + 0.5 |
V |
| IIK |
DC Input Diode Current |
± 20 |
mA |
| IOK |
DC Output Diode Current |
± 20 |
mA |
| IO |
DC Output Current |
± 35 |
mA |
| ICC or IGND |
DC VCC or Ground Current |
± 70 |
mA |
| PD |
Power Dissipation |
500 (*) |
mW |
| Tstg |
Storage Temperature |
-65 to +150 |
|
| TL |
Lead Temperature (10 sec) |
300 |
|
AbsoluteMaximum Ratings arethose values beyond whichdamage tothe devicemayoccur. Functional operation under these conditions is not implied. (*) 500 mW: @ 65 derate to 300mWby 10mW/oC: 65 to85DescriptionThe M54/74HCT125/126 are high speed CMOS QUAD BUS BUFFER (3-STATE) FABRICATED IN SILICON GATE C2MOS technology. They have the same high speed performance ofLSTTL combined with trueCMOS low power consumption. These devices require the same 3-STATE control input G to be taken high to make the output go into the high mpedance state.This integrated circuit has input and output characteristics that are fully compatible with 54/74 LSTTL logic families. M54/74HCT devices are designed to directly interface HSC2MOS systems with TTL and NMOS omponents. They are also plug in replacements for LSTTL devices giving a reduction of power consumption. All inputs are equipped with protection circuits against static discharge and transient excess voltage.
The 74HCT125 is designed as one kind of quad 3-state noninverting buffer that can be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. And it also can be used with 3-state memory address drivers, clock drivers, and other bus-oriented systems.
Features of the 74HCT125 are:(1)TTL/NMOS compatible input levels; (2)outputs directly interface to CMOS, NMOS, and TTL; (3)operating voltage range: 4.5 to 5.5 V; (4)low input current: 1.0 uA.
The absolute maximum ratings of the 74HCT125 can be summarized as:(1)DC Supply Voltage (Referenced to GND): -0.5 to +7.0 V;(2)DC Input Voltage (Referenced to GND): -1.5 to VCC +1.5 V;(3)DC Output Voltage (Referenced to GND):-0.5 to VCC +0.5 V;(4)DC Input Current, per Pin: ±20 mA;(5)DC Output Current, per Pin: ±35 mA;(6)DC Supply Current, VCC and GND Pins: ±75 mA;(7)Power Dissipation in Still Air, Plastic DIP+: 750 mW;(8)Storage Temperature: -65 to +150 °C;(9)Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP or SOIC Package): 260 °C. If you want to know more information such as the electrical characteristics about it, please download the datasheet in www.seekic.com or www.chinaicmart.com .
74HCT125 Data Sheet
