HD74LV125A
通古斯族Quad. Bus Buffer Gates with 3-state Outputs
ADE-205-245 (Z)
1st Edition
March 1999 Description
The HD74LV125A features independent line drivers with three state outputs. Each output is disabled when the associated output enable (OE) input is high. To ensure the high impedance state during power up or power down, OE should be connected to V
through a pull-down resistor; the minimum value of the
CC
resistor is determined by the current souring capability of the driver. Low-voltage and high-speed operation is suitable for the battery-powered products (e.g., notebook computers), and the low-power consumption extends the battery life.
Features
• V CC = 2.0 V to 5.5 V operation
• All inputs V IH (Max.) = 5.5 V (@V CC = 0 V to 5.5 V)
• All outputs V O (Max.) = 5.5 V (@V CC = 0 V)
• Typical V OL ground bounce < 0.8 V (@V CC = 3.3 V, Ta = 25°C)
• Typical V OH undershoot > 2.3 V (@V CC = 3.3 V, Ta = 25°C)
• Output current ±8 mA (@V CC = 3.0 V to 3.6 V), ±16 mA (@V CC = 4.5 V to 5.5 V)
Function Table
Inputs
OE A Output Y
L H H
L L L
H X Z
Note:H:High level
L:Low level
X:Immaterial
Z:High impedance
HD74LV125A Pin Arrangement
2
HD74LV125A
3
Absolute Maximum Ratings
Item
Symbol Ratings Unit Conditions
Supply voltage range V CC –0.5 to 7.0V Input voltage range*1V I –0.5 to 7.0V Output voltage range*1, 2V O –0.5 to V CC + 0.5V
Output: H or L –0.5 to 7.0V CC : OFF or Output: Z Input clamp current I IK –20mA V I < 0
Output clamp current I OK ±50mA V O < 0 or V O > V CC Continuous output current I O
±35mA V O = 0 to V CC Continuous current through V CC or GND
I CC or I GND ±70mA Maximum power dissipation at Ta = 25°C (in still air)*3P T
785mW
SOP 500
TSSOP
Storage temperature
Tstg
–65 to 150
°C Notes:The absolute maximum ratings are values which must not individually be exceeded, and furthermore,
no two of which may be realized at the same time.
1.The input and output voltage ratings may be exceeded if the input and output clamp-current
ratings are observed.
2.This value is limited to 5.5 V maximum.
3.The maximum package power dissipation was calculated using a junction temperature of 150°C.
HD74LV125A
4
Recommended Operating Conditions
Item
Symbol Min Max Unit Conditions
Supply voltage range V CC 2.0 5.5V Input voltage range V I 0 5.5V Output voltage range V O 0V CC V
H or L
0 5.5High impedance state Output current
I OH
—–50µA V CC = 2.0 V —–2mA V CC = 2.3 to 2.7 V —–8V CC = 3.0 to 3.6 V —牛顿物理仿真
–16V CC = 4.5 to 5.5 V I OL
—50µA V CC = 2.0 V —2mA V CC = 2.3 to 2.7 V —8V CC = 3.0 to 3.6 V —
16V CC = 4.5 to 5.5 V Input transition rise or fall rate
∆t /∆v
0200ns/V V CC = 2.3 to 2.7 V 0100V CC = 3.0 to 3.6 V 0
20V CC = 4.5 to 5.5 V Operating free-air temperature
Ta
–40
85
°C Note:Unused or floating inputs must be held high or low.热点趋势 HD74LV125A Logic Diagram
5
HD74LV125A
6
DC Electrical Characteristics
• Ta = –40 to 85°C
Item Symbol V CC (V)*Min Typ Max Unit Test Conditions
Input voltage
V IH
2.0 1.5——V
2.3 to 2.7V CC × 0.7——
3.0 to 3.6V CC × 0.7——
4.5 to
5.5
V CC × 0.7——V IL
2.0——0.52.3 to 2.7——V CC × 0.3
3.0 to 3.6——V CC × 0.3
4.5 to
专利法
——V CC × 0.3Output voltage
V OH
Min to Max V CC – 0.1——V
I OH = –50 µA 2.3 2.0——I OH = –2 mA 3.0 2.48——I OH = –8 mA 4.5
3.8——I OH = –16 mA V OL
Min to Max ——0.1I OL = 50 µA 2.3——0.4I OL = 2 mA 3.0——0.44I OL = 8 mA 4.5
——0.55I OL = 16 mA Input current I IN 0 to 5.5——±1µA V I = 5.5 V or GND Off-state
output current I OZ 5.5——±5µA V O = V CC or GND Quiescent supply current I CC 5.5——20µA V I = V CC or GND, I O = 0Output leakage current I OFF 0——5µA V I or V O = 0 V to 5.5 V Input
capacitance
3.3
—
3.0
—
pF V I = V CC or GND
Note:For conditions shown as Min or Max, use the appropriate values under recommended operating
conditions.
豫公网安备41160202000603
站长QQ:729038198
关于我们
投诉建议