Datasheet CD54HC123, CD74HC123, CD54HCT123, CD74HCT123, CD74HC423, CD74HCT423 (Texas Instruments) - 8
| Manufacturer | Texas Instruments |
| Description | High-Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets |
| Pages / Page | 22 / 8 — Test Circuits and Waveforms. B = LOW. A = HIGH. FIGURE 1. OUTPUT PULSE … |
| Revision | F |
| File Format / Size | PDF / 1.0 Mb |
| Document Language | English |
Test Circuits and Waveforms. B = LOW. A = HIGH. FIGURE 1. OUTPUT PULSE CONTROL USING RESET INPUT
Text Version of Document
Test Circuits and Waveforms A B = LOW A B = LOW A = HIGH A = HIGH B B R R V V S S t t W W tW VS V Q S Q t t W W tW tW FIGURE 1. OUTPUT PULSE CONTROL USING RESET INPUT FIGURE 2. OUTPUT PULSE CONTROL USING RESET INPUT (R) PULSE FOR 123 (R) FOR 423 A B tW B (R = HIGH) A trT VS Q tW tW tW
NOTE: Output pulse control using retrigger pulse for 123 and 423.
FIGURE 3. TRIGGERING OF ONE SHOT BY INPUT A OR INPUT B FOR A PERIOD tW 8 0.9 6 EXTERNAL CAPACITANCE (C 4 X) = 10nF 0.8 2 EXTERNAL RESISTANCE (RX) = 10k
Ω
TO 100k
Ω µ
s) 103 AMBIENT TEMPERATURE (T 8
Ω
A) = 25oC 0.7 6 4 = 100k 0.6 2 R X OR
Ω
102 CT 8 A 0.5 HCT 6 = 10k 4 R X “K” F 0.4 2 101 8 DC SUPPLY VOLTAGE (V 0.3 CC) = 5V OUTPUT PULSE WIDTH ( 6 4 AMBIENT TEMPERATURE (TA) = 25oC 0.2 2 2 4 6 8 2 4 6 8 2 4 6 8 2 4 6 8 0.1 103 104 105 106 107 1 2 3 4 5 6 7 8 9 10 11 EXTERNAL CAPACITANCE (CX) - pF DC SUPPLY VOLTAGE (VCC) - VOLTS FIGURE 4. TYPICAL OUTPUT PULSE WIDTH AS A FUNCTION FIGURE 5. TYPICAL “K” FACTOR AS A FUNCTION OF VCC OF CX FOR RX = 10k
Ω
AND 100k
Ω 8
NOTE: Output pulse control using retrigger pulse for 123 and 423.
FIGURE 3. TRIGGERING OF ONE SHOT BY INPUT A OR INPUT B FOR A PERIOD tW 8 0.9 6 EXTERNAL CAPACITANCE (C 4 X) = 10nF 0.8 2 EXTERNAL RESISTANCE (RX) = 10k
Ω
TO 100k
Ω µ
s) 103 AMBIENT TEMPERATURE (T 8
Ω
A) = 25oC 0.7 6 4 = 100k 0.6 2 R X OR
Ω
102 CT 8 A 0.5 HCT 6 = 10k 4 R X “K” F 0.4 2 101 8 DC SUPPLY VOLTAGE (V 0.3 CC) = 5V OUTPUT PULSE WIDTH ( 6 4 AMBIENT TEMPERATURE (TA) = 25oC 0.2 2 2 4 6 8 2 4 6 8 2 4 6 8 2 4 6 8 0.1 103 104 105 106 107 1 2 3 4 5 6 7 8 9 10 11 EXTERNAL CAPACITANCE (CX) - pF DC SUPPLY VOLTAGE (VCC) - VOLTS FIGURE 4. TYPICAL OUTPUT PULSE WIDTH AS A FUNCTION FIGURE 5. TYPICAL “K” FACTOR AS A FUNCTION OF VCC OF CX FOR RX = 10k
Ω
AND 100k
Ω 8
