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PDF ( 数据手册 , 数据表 ) 74AHC14

零件编号 74AHC14
描述 Hex inverting Schmitt trigger
制造商 NXP Semiconductors
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74AHC14 数据手册, 描述, 功能
74AHC14; 74AHCT14
Hex inverting Schmitt trigger
Rev. 05 — 4 May 2009
Product data sheet
1. General description
The 74AHC14; 74AHCT14 is a high-speed Si-gate CMOS device and is pin compatible
with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard
No. 7A.
The 74AHC14; 74AHCT14 provides six inverting buffers with Schmitt-trigger action. They
are capable of transforming slowly changing input signals into sharply defined, jitter-free
output signals.
2. Features
I Balanced propagation delays
I All inputs have Schmitt-trigger actions
I Inputs accept voltages higher than VCC
I Input levels:
N For 74AHC14: CMOS level
N For 74AHCT14: TTL level
I ESD protection:
N HBM EIA/JESD22-A114E exceeds 2000 V
N MM EIA/JESD22-A115-A exceeds 200 V
N CDM EIA/JESD22-C101C exceeds 1000 V
I Multiple package options
I Specified from 40 °C to +85 °C and from 40 °C to +125 °C







74AHC14 pdf, 数据表
NXP Semiconductors
74AHC14; 74AHCT14
Hex inverting Schmitt trigger
Table 9. Test data
Type
74AHC14
74AHCT14
Input
VI
VCC
3.0 V
tr, tf
3.0 ns
3.0 ns
12. Transfer characteristics
Load
CL
50 pF, 15 pF
50 pF, 15 pF
Test
tPLH, tPHL
tPLH, tPHL
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
25 °C
40 °C to +85 °C 40 °C to +125 °C Unit
Min Typ Max Min Max Min Max
74AHC14
VT+ positive-going VCC = 3.0 V
threshold
voltage
VCC = 4.5 V
VCC = 5.5 V
VTnegative-going VCC = 3.0 V
threshold
voltage
VCC = 4.5 V
VCC = 5.5 V
VH
hysteresis
VCC = 3.0 V
voltage
VCC = 4.5 V
VCC = 5.5 V
74AHCT14
- - 2.2 - 2.2 - 2.2 V
- - 3.15 - 3.15 - 3.15 V
- - 3.85 - 3.85 - 3.85 V
0.9 - - 0.9 - 0.9
-V
1.35 -
- 1.35
-
1.35
-V
1.65 -
- 1.65
-
1.65
-V
0.3 - 1.2 0.3
1.2 0.25
1.2 V
0.4 - 1.4 0.4
1.4 0.35
1.4 V
0.5 - 1.6 0.5
1.6 0.45
1.6 V
VT+ positive-going VCC = 4.5 V
threshold
voltage
VCC = 5.5 V
- - 1.9 - 1.9 - 1.9 V
- - 2.1 - 2.1 - 2.1 V
VTnegative-going VCC = 4.5 V
threshold
voltage
VCC = 5.5 V
0.5 - - 0.5 - 0.5
0.6 - - 0.6 - 0.6
-V
-V
VH
hysteresis
VCC = 4.5 V
voltage
VCC = 5.5 V
0.4 - 1.4 0.4
0.4 - 1.5 0.4
1.4 0.35
1.5 0.35
1.4 V
1.5 V
13. Transfer characteristics waveforms
VO
VT+
VI VH
VT
VH
VTVT+
Fig 8. Transfer characteristics
VI
mna207
VO
mna208
Fig 9. Transfer characteristics definitions
74AHC_AHCT14_5
Product data sheet
Rev. 05 — 4 May 2009
© NXP B.V. 2009. All rights reserved.
8 of 16







74AHC14 equivalent, schematic
NXP Semiconductors
20. Contents
1 General description . . . . . . . . . . . . . . . . . . . . . . 1
2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information . . . . . . . . . . . . . . . . . . . . . 2
4 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
6 Functional description . . . . . . . . . . . . . . . . . . . 4
7 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4
8 Recommended operating conditions. . . . . . . . 4
9 Static characteristics. . . . . . . . . . . . . . . . . . . . . 5
10 Dynamic characteristics . . . . . . . . . . . . . . . . . . 6
11 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
12 Transfer characteristics. . . . . . . . . . . . . . . . . . . 8
13 Transfer characteristics waveforms. . . . . . . . . 8
14 Application information. . . . . . . . . . . . . . . . . . 10
15 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 11
16 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 14
17 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 14
18 Legal information. . . . . . . . . . . . . . . . . . . . . . . 15
18.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 15
18.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
18.3 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
18.4 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
19 Contact information. . . . . . . . . . . . . . . . . . . . . 15
20 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
74AHC14; 74AHCT14
Hex inverting Schmitt trigger
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2009.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 4 May 2009
Document identifier: 74AHC_AHCT14_5










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