54F191DMQB. Counter Single 4-Bit Async Binary UP/Down 16-Pin CDIP Rail
From NATIONAL SEMICONDUCTOR
| Direction Type | Bi-Directional |
| Logic Family | F |
| Logical Function | Counter |
| Maximum Propagation Delay Time @ Maximum CL | 13.5@4.5V TO 5.5V |
| Mounting | Through Hole |
| Number of Elements | 1 |
| Number of Bits | 4 |
| Number of Count Input Enables | 2 |
| Number of Inputs | 4 |
| Number of Outputs | 4 |
| Number of Selection Inputs per Element | 0 |
| Operating Supply Voltage (Max) | 5.5(V) |
| Operating Supply Voltage (Min) | 4.5(V) |
| Operating Supply Voltage (Typ) | 5(V) |
| Operating Temp Range | -55C to 125C |
| Operating Temperature Classification | Military |
| Package Type | CDIP |
| Packaging | Rail/Tube |
| Parallel Enable Input | YES |
| Pin Count | 16 |
| Preset Type | ASYNCHRONOUS |
| Propagation Delay Time | 22(ns) |
| Rad Hardened | No |
| Technology | Bipolar |
| Terminal Count Output | YES |
| Triggering Type | POSITIVE-EDGE |
| Type | Binary |
