74HC7540D Datasheet, PDF (9/16 Pages) NXP Semiconductors – Octal Schmitt trigger buffer/line driver; 3-state; inverting Rev. 4 — 31 December 2012

NXP Semiconductors
74HC7540; 74HCT7540
Octal Schmitt trigger buffer/line driver; 3-state; inverting
12. Transfer characteristics
Table 10. Transfer characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V); see Figure 8 and Figure 9.
Symbol Parameter Conditions
T_amb = 25 C
T_amb = 40 C
to +85 C
T_amb = 40 C Unit
to +125 C
Min Typ Max Min
Max
Min
Max
74HC7540
V_T+
positive-going V_CC = 2.0 V
threshold
voltage
V_CC = 4.5 V
V_CC = 6.0 V
V_T
negative-going V_CC = 2.0 V
threshold
voltage
V_CC = 4.5 V
V_CC = 6.0 V
V_H
hysteresis
V_CC = 2.0 V
voltage
V_CC = 4.5 V
V_CC = 6.0 V
74HCT7540
-
- 1.5
-
1.5
-
1.5 V
-
- 3.15 -
3.15
-
3.15 V
-
- 4.2
-
4.2
-
4.2 V
0.3 -
-
0.3
-
0.3
-
V
1.35 -
- 1.35
-
1.35
-
V
1.8 -
-
1.8
-
1.8
-
V
0.1 0.20 -
0.1
-
0.1
-
V
0.25 0.40 - 0.25
-
0.25
-
V
0.3 0.5 -
0.3
-
0.3
-
V
V_T+
positive-going V_CC = 4.5 V
threshold
voltage
V_CC = 5.5 V
-
- 2.0
-
2.0
-
2.0 V
-
- 2.1
-
2.1
-
2.1 V
V_T
negative-going V_CC = 4.5 V
threshold
voltage
V_CC = 5.5 V
0.7 -
- 0.64
-
0.6
-
V
0.8 -
- 0.74
-
0.7
-
V
V_H
hysteresis
V_CC = 4.5 V
voltage
V_CC = 5.5 V
0.17 0.23 -
-
-
-
-
V
0.17 0.23 -
-
-
-
-
V
13. Transfer characteristics waveforms
V_O
V_T+
V_I
V_H
V_T−
V_H
V_T−
V_T+
Fig 8. Transfer characteristics
V_I
mna207
V_O
mna208
Fig 9. Transfer characteristics definitions
74HC_HCT7540
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 31 December 2012
© NXP B.V. 2012. All rights reserved.
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