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74HC_HCT4538 Datasheet(PDF) 4 Page - NXP Semiconductors

Part # 74HC_HCT4538
Description  Dual retriggerable precision monostable multivibrator
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC_HCT4538 Datasheet(HTML) 4 Page - NXP Semiconductors

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74HC_HCT4538_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 8 June 2009
4 of 24
NXP Semiconductors
74HC4538; 74HCT4538
Dual retriggerable precision monostable multivibrator
5.
Pinning information
5.1 Pinning
5.2 Pin description
Fig 3.
Pin configuration for DIP16 and SO16
Fig 4.
Pin configuration for SSOP16 and TSSOP16
74HC4538
74HCT4538
1CEXT
VCC
1REXT/CEXT
2CEXT
1CD
2REXT/CEXT
1B
2CD
1A
2B
1Q
2A
1Q
2Q
GND
2Q
001aak190
1
2
3
4
5
6
7
8
10
9
12
11
14
13
16
15
74HC4538
74HCT4538
1CEXT
VCC
1REXT/CEXT
2CEXT
1CD
2REXT/CEXT
1B
2CD
1A
2B
1Q
2A
1Q
2Q
GND
2Q
001aak191
1
2
3
4
5
6
7
8
10
9
12
11
14
13
16
15
Table 2.
Pin description
Symbol
Pin
Description
1CEXT, 2CEXT
1, 15
external capacitor connection (always connected to ground)
1REXT/CEXT, 2REXT/CEXT
2, 14
external capacitor/resistor connection
1CD, 2CD
3, 13
direct reset input (active LOW)
1B, 2B
4, 12
input (LOW to HIGH triggered)
1A, 2A
5, 11
input (HIGH to LOW triggered)
1Q, 2Q
6, 10
output
1Q, 2Q
7, 9
complementary output (active LOW)
GND
8
ground (0 V)
VCC
16
supply voltage


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