Analog Devices AN680 Application Notes

AN-680

APPLICATION NOTE

One Technology Way

9106

www.analog.com

supply voltages.

LVTTL

VCC = 2.7V–3.6V

EIA/JEDEC 8-5

2.5V

VCC = 2.3V–2.7V

EIA/JEDEC 8-5

1.8V

VCC = 1.65V–1.95V

EIA/JEDEC 8-7

TTL

VCC = 4.5V–5.5V

VOH = 4.44V

VIH = 0.7  V

CC

VTH = 0.5  V

CC

VIL = 0.3  V

CC

VOL = 0.5V

5V CMOS

VCC = 4.5V–5.5V

VOH = 2.4V

VIH = 2.0V

VTH = 1.5V

VIL = 0.8V

VOL = 0.4V

VOH = 2V
VIH = 1.7V

VIL = 0.7V
VOL = 0.4V

VOH = VCC–0.45V
VIH = 0.65V

CC

VIL = 0.35V

CC

VOL = 0.45V

VOH = 2.4V

VIH = 2.0V

VTH = 1.5V

VIL = 0.8V

VOL = 0.4V

VL (V)

2 7

12 17

VOLTAGE THRESHOLD (V)

4.5

4.0

0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

RISING

FALLING