74HC244 Octal Buffer/Line Driver with 3-State Outputs
Octal non-inverting buffer and line driver designed to drive bus lines or memory address registers. Features two 4-bit sections with independent active-low output enables.
Aliase:SN74HC244N, 74HCT244, Octal Buffer
DIP-20 Top View
20 Pins
Pinout Table20
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | ~1OE | Digital | Section 1 Output Enable (Active Low) |
| 2 | 1A1 | Digital | Driver 1 Input 1 |
| 3 | 2Y4 | Digital | Driver 2 Output 4 (3-State) |
| 4 | 1A2 | Digital | Driver 1 Input 2 |
| 5 | 2Y3 | Digital | Driver 2 Output 3 (3-State) |
| 6 | 1A3 | Digital | Driver 1 Input 3 |
| 7 | 2Y2 | Digital | Driver 2 Output 2 (3-State) |
| 8 | 1A4 | Digital | Driver 1 Input 4 |
| 9 | 2Y1 | Digital | Driver 2 Output 1 (3-State) |
| 10 | GND | Ground | System Ground (0V) |
| 11 | 2A1 | Digital | Driver 2 Input 1 |
| 12 | 1Y4 | Digital | Driver 1 Output 4 (3-State) |
| 13 | 2A2 | Digital | Driver 2 Input 2 |
| 14 | 1Y3 | Digital | Driver 1 Output 3 (3-State) |
| 15 | 2A3 | Digital | Driver 2 Input 3 |
| 16 | 1Y2 | Digital | Driver 1 Output 2 (3-State) |
| 17 | 2A4 | Digital | Driver 2 Input 4 |
| 18 | 1Y1 | Digital | Driver 1 Output 1 (3-State) |
| 19 | ~2OE | Digital | Section 2 Output Enable (Active Low) |
| 20 | VCC | Power | Positive Supply Voltage (+2V to +6V) |