HD74HCT08A
HD74HCT08A is Quad. 2-input Positive AND Gates manufactured by Hitachi Semiconductor.
Description
The HD74HCT08A has four 2-input AND gates in a 14 pin package. Y = A- B or Y = A + B
Features
- VCC = 4.5 to 5.5 V operation
- Input terminal has protection diode
Function Table
Inputs A H L X H : High level L : Low level X : Immaterial B H X L H L L Output Y
Pin Arrangement
1A 1 1B 1Y 2 3
14 VCC 13 4B 12 4A 11 4Y 10 3B 9 3A 8 3Y
2A 4 2B 2Y 5 6
GND 7
(Top view)
Absolute Maximum Ratings
Item Supply voltage Input diode peak current Output diode peak current Output current VCC, GND current / pin Storage temperature Symbol VCC I IK I OK IO I CC or IGND Tstg Ratings
- 0.5 to 7.0 ±20 ±20 ±25 ±50
- 65 to 150 Unit V m A m A m A m A °C
Remended Operating Conditions
Item Supply voltage Input voltage Symbol VCC VIH VIL VI Output voltage Output current VO I OH I OL Input rise / fall time Operating temperature t r, t f Ta Min 4.5 2.0 0 0 0
- -
- - 40 Typ 5.0
- -
- -
- 4 4
- - Max 5.5
- 0.8 VCC VCC
- - 500 85 ns °C V m A Unit V V
Logic Diagram (1/4 Circuit)
Electrical Characteristics
Item Symbol VCC (V) Ta = 25°C Min Output voltage VOH 4.5 4.5 VOL 4.5 4.5 Input current Quiescent supply voltage II I CC 5.5 5.5 4.40 3.98
- -
- - Typ
- -
- - ±0.1
- Max
- - 0.10 0.26 ±100 2.0
Ta =
- 40 to 85°C Unit Test Conditions
Min 4.40...
