Datasheet Details
| Part number | DM74LS491 |
|---|---|
| Manufacturer | National Semiconductor (now Texas Instruments) |
| File Size | 136.79 KB |
| Description | 10-Bit Counter |
| Datasheet | DM74LS491_NationalSemiconductor.pdf |
|
|
Overview: DM54LS491 74LS491 10-Bit Counter July 1989 DM54LS491 74LS491 10-Bit.
| Part number | DM74LS491 |
|---|---|
| Manufacturer | National Semiconductor (now Texas Instruments) |
| File Size | 136.79 KB |
| Description | 10-Bit Counter |
| Datasheet | DM74LS491_NationalSemiconductor.pdf |
|
|
|
The ten-bit counter can count up count down set and load 2 LSB’s 2 MSB’s and 6 middle bits high or low as a group All operations are synchronous with the clock SET overrides LOAD COUNT and HOLD LOAD overrides COUNT COUNT is conditional on CIN otherwise it holds All outputs are enabled when OE is low otherwise HIGH-Z The 24 mA IOL outputs are suitable for driving RAM PROM address lines in video graphics systems
| Part Number | Description |
|---|---|
| DM74LS40 | Dual 4-Input NAND Buffer |
| DM74LS42 | Decimal Decoders |
| DM74LS447 | BCD to 7-Segment Decoder/Driver |
| DM74LS450 | 16:1 Multiplexer |
| DM74LS451 | DM54LS451/DM74LS451 DUAL 8:1 Multiplexer |
| DM74LS460 | 10-Bit Comparator |
| DM74LS461 | Octal Counter |
| DM74LS465 | (DM74LS465 - DM74LS468) TRI-STATE Octal Buffer |
| DM74LS466 | (DM74LS465 - DM74LS468) TRI-STATE Octal Buffer |
| DM74LS467 | (DM74LS465 - DM74LS468) TRI-STATE Octal Buffer |