Datasheet CD54HC123, CD74HC123, CD54HCT123, CD74HCT123, CD74HC423, CD74HCT423 (Texas Instruments) - 5
| Manufacturer | Texas Instruments |
| Description | High-Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets |
| Pages / Page | 22 / 5 — CD54/74HC123, CD54/74HCT123, CD74HC423, CD74HCT423. Prerequisite for … |
| Revision | F |
| File Format / Size | PDF / 1.0 Mb |
| Document Language | English |
CD54/74HC123, CD54/74HCT123, CD74HC423, CD74HCT423. Prerequisite for Switching Specifications (Continued). 25oC
Text Version of Document
CD54/74HC123, CD54/74HCT123, CD74HC423, CD74HCT423 Prerequisite for Switching Specifications (Continued) 25oC -40oC TO 85oC -55oC TO 125oC PARAMETER SYMBOL VCC (V) MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
R tWL 2 100 - - 125 - - 150 - 150 ns 4.5 20 - - 25 - - 30 - 30 ns 6 17 - - 21 - - 26 - 26 ns A and B Hold Time tH 2 50 - - 65 - - 75 - 75 ns 4.5 10 - - 13 - - 15 - 15 ns 6 9 - - 11 - - 13 - 13 ns Reset Removal Time tREM 2 50 - - 65 - - 75 - 75 ns 4.5 10 - - 13 - - 15 - 15 ns 6 9 - - 11 - - 13 - 13 ns Retrigger Time Number trT 5 - - - - - - - - - ns RX = 10KΩ, CX = 0 - 50 - - 63 - - 76 - ns Output Pulse Width tW 5 Q or Q RX = 10KΩ, CX = 10nF 40 - 50 38.7 - 51.3 38.2 - 51.8 µs
HCT TYPES
Minimum Input, - Pulse Width tWL 5 A 20 - - 25 - - 30 - - ns B tWH 20 - - 25 - - 30 - - ns R tWL 20 - - 25 - - 30 - - ns A and B Hold Time tH 5 10 - - 13 - - 15 - - ns Reset Removal Time tREM 5 10 - - 13 - - 15 - ns Retrigger Time Number (Note 3) RX = 10KΩ, CX = 0 trT 5 - 50 - - 63 - - 76 - ns Output Pulse Width Q or Q tW 5 40 - 50 38.7 - 51.3 38.2 - 51.8 µs RX = 10KΩ, CX = 10nF NOTE: 3. Time to trigger depends on the values of RX and CX. The output pulse width can only be extended when the time between the active- going edges of the trigger input pulses meet the minimum retrigger time requirement. 5
R tWL 2 100 - - 125 - - 150 - 150 ns 4.5 20 - - 25 - - 30 - 30 ns 6 17 - - 21 - - 26 - 26 ns A and B Hold Time tH 2 50 - - 65 - - 75 - 75 ns 4.5 10 - - 13 - - 15 - 15 ns 6 9 - - 11 - - 13 - 13 ns Reset Removal Time tREM 2 50 - - 65 - - 75 - 75 ns 4.5 10 - - 13 - - 15 - 15 ns 6 9 - - 11 - - 13 - 13 ns Retrigger Time Number trT 5 - - - - - - - - - ns RX = 10KΩ, CX = 0 - 50 - - 63 - - 76 - ns Output Pulse Width tW 5 Q or Q RX = 10KΩ, CX = 10nF 40 - 50 38.7 - 51.3 38.2 - 51.8 µs
HCT TYPES
Minimum Input, - Pulse Width tWL 5 A 20 - - 25 - - 30 - - ns B tWH 20 - - 25 - - 30 - - ns R tWL 20 - - 25 - - 30 - - ns A and B Hold Time tH 5 10 - - 13 - - 15 - - ns Reset Removal Time tREM 5 10 - - 13 - - 15 - ns Retrigger Time Number (Note 3) RX = 10KΩ, CX = 0 trT 5 - 50 - - 63 - - 76 - ns Output Pulse Width Q or Q tW 5 40 - 50 38.7 - 51.3 38.2 - 51.8 µs RX = 10KΩ, CX = 10nF NOTE: 3. Time to trigger depends on the values of RX and CX. The output pulse width can only be extended when the time between the active- going edges of the trigger input pulses meet the minimum retrigger time requirement. 5
