EC31 Series Test Circuits

• Note 1: An external 0.1µF low frequency tantalum bypass capacitor in parallel with a 0.01µF high frequency ceramic bypass capacitor close to the package ground and V_DD pin is required.
• Note 2: A low input capacitance (<12pF), 10X Attentuation Factor, High Impedance (>10Mohms), and High bandwidth (>300MHz) passive probe is recommended.
• Note 3: Capacitance value C_L includes sum of all probe and fixture capacitance.
• Note 4: Resistance value R_L is shown in Table I. See applicable specification sheet for ‘Load Drive Capability’.
• Note 5: All diodes are MMBD7000, MMBD914, or equivalent.

Table 1: R_L Resistance Value and C_L Capacitance Value Vs. Output Load Drive Capability

Output Load Drive Capability	RL Value (Ohms)	CL Value (pF)
10TTL	390	15
5TTL	780	15
2TTL	1100	6
10LSTTL	2000	15
1TTL	2200	3

• Note 1: An external 0.1µF low frequency tantalum bypass capacitor in parallel with a 0.01µF high frequency ceramic bypass capacitor close to the package ground and pin is required.
• Note 2: A low input capacitance (<12pF), 10X Attentuation Factor, High Impedance (>10Mohms), and High bandwidth (>300MHz) passive probe is recommended.
• Note 3: Capacitance value includes sum of all probe and fixture capacitance. See applicable specification sheet for ‘Load Drive Capability’.