參數(shù)資料
型號(hào): HEF4538BT
廠商: NXP Semiconductors N.V.
元件分類: 振蕩器
英文描述: Dual precision monostable multivibrator
封裝: HEF4538BP<SOT38-4 (DIP16)|<<http://www.nxp.com/packages/SOT38-4.html<1<Always Pb-free,;HEF4538BT<SOT109-1 (SO16)|<<http://www.nxp.com/packages/SOT109-1.html<1<week
文件頁數(shù): 5/18頁
文件大?。?/td> 447K
代理商: HEF4538BT
HEF4538B
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 7 — 17 February 2011
5 of 18
NXP Semiconductors
HEF4538B
Dual precision monostable multivibrator
8. Limiting values
(1) Positive edge triggering.
(2) Positive edge re-triggering (pulse lengthening).
(3) Negative edge triggering.
(4) Reset (pulse shortening).
(5) T = R
EXT
C
EXT
.
Fig 4.
Timing diagram
001aae737
(1)
(3)
(5)
(4)
(1)
(2)
(1)
V
ref1
T
V
ref2
V
ref2
V
ref1
T
T
nA input
nB input
nCD input
nREXT/CEXT input
nQ output
Fig 5.
Connection of the external timing components R
EXT
and C
EXT
001aae735
nCD
nA
nB
nCEXT
V
DD
nREXT/CEXT
REXT
CEXT
nQ
nQ
T
T = R
EXT
×
C
EXT
Table 4.
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to V
SS
= 0 V (ground)
Symbol
Parameter
Conditions
V
DD
supply voltage
I
IK
input clamping current
V
I
<
0.5 V or V
I
> V
DD
+ 0.5 V
V
I
input voltage
I
OK
output clamping current
V
I
<
0.5 V or V
I
> V
DD
+ 0.5 V
I
I/O
input/output current
I
DD
supply current
T
stg
storage temperature
Limiting values
Min
0.5
-
0.5
-
-
-
65
Max
+18
10
V
DD
+ 0.5
10
10
50
+150
Unit
V
mA
V
mA
mA
mA
C
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