HEF4538B(2009) 查看數據表（PDF） - NXP Semiconductors.

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HEF4538B
(Rev.:2009)

Dual precision monostable multivibrator

NXP Semiconductors. 

NXP Semiconductors

HEF4538B

Dual precision monostable multivibrator

(1)

nB input

(3)

nA input

nCD input

nREXT/CEXT input

Vref1

Vref2

nQ output

T

T

(5)

(1) Positive edge triggering.

(2) Positive edge re-triggering (pulse lengthening).

(3) Negative edge triggering.

(4) Reset (pulse shortening).

(5) T = REXT × CEXT.

Fig 4. Timing diagram

(1)

(2)

(1)

(4)

Vref1

Vref2

T

001aae737

CEXT

REXT

VDD

nCEXT

nREXT/CEXT

nQ

T

nA

T = REXT × CEXT

nB

nQ

nCD

001aae735

Fig 5. Connection of the external timing components REXT and CEXT

8. Limiting values

Table 4. Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to VSS = 0 V (ground)

Symbol

Parameter

Conditions

Min

Max

Unit

VDD

supply voltage

−0.5

+18

V

IIK

input clamping current

VI < −0.5 V or VI > VDD + 0.5 V

-

±10

mA

VI

input voltage

−0.5

VDD + 0.5 V

IOK

output clamping current

VI < −0.5 V or VI > VDD + 0.5 V

-

±10

mA

II/O

input/output current

-

±10

mA

IDD

supply current

-

50

mA

Tstg

storage temperature

−65

+150

°C

HEF4538B_6

Product data sheet

Rev. 06 — 2 November 2009

© NXP B.V. 2009. All rights reserved.

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