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參數(shù)資料
| 型號： | HEC4538 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Dual precision monostable multivibrator |
| 中文描述： | 雙精密單穩(wěn)態(tài)觸發(fā)器 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 117K |
| 代理商： | HEC4538 |
January 1995
2
Philips Semiconductors
Product specification
Dual precision monostable multivibrator
HEF4538B
MSI
DESCRIPTION
The HEF4538B is a dual retriggerable-resettable
monostable multivibrator. Each multivibrator has an active
LOW trigger/retrigger input (I
0
), an active HIGH
trigger/retrigger input (I
1
), an overriding active LOW direct
reset input (C
D
), an output (O) and its complement (O),
and two pins (C
TC
,
(1)
RC
TC
) for connecting the external
timing components C
t
and R
t
. Typical pulse width variation
over temperature range is
±
0,2%.
The HEF4538B may be triggered by either the positive or
the negative edges of the input pulse and will produce an
accurate output pulse with a pulse width range of 10
μ
s to
infinity. The duration and accuracy of the output pulse are
determined by the external timing components C
t
and R
t
.
The output pulse width (T) is equal to R
t
×
C
t
. The linear
design techniques in LOCMOS guarantee precise control
of the output pulse width.
A LOW level at C
D
terminates the output pulse
immediately. Schmitt-trigger action in the trigger inputs
makes the circuit highly tolerant to slower rise and fall
times.
Fig.1 Functional diagram.
PINNING
Note
1.
Always connected to ground.
FAMILY DATA, I
DD
LIMITS category MSI
See Family specifications.
HEF4538BP(N):
HEF4538BD(F):
HEF4538BT(D):
( ): Package Designator North America
16-lead DIL; plastic (SOT38-1)
16-lead DIL; ceramic (cerdip) (SOT74)
16-lead SO; plastic (SOT109-1)
I
0A,
I
0B
I
1A
, I
1B
C
DA
, C
DB
O
A
, O
B
O
A
, O
B
C
TC A
, C
TC B
RC
TC A
, RC
TC B
input (HIGH to LOW triggered)
input (LOW to HIGH triggered)
direct reset input (active LOW)
output
complementary output (active LOW)
external capacitor connections
(1)
external capacitor/ resistor
connections
Fig.2 Pinning diagram.
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| HEC4538BT | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL PRECISIN MONOST MULTIVIB RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| HEC4538BT,112 | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL PRECISIN MONOST RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| HEC4538BT,118 | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL PRECISIN MONOST RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| HEC4538BT-T | 功能描述:單穩(wěn)態(tài)多諧振蕩器 DUAL PRECISIN MONOST MULTIVIB RoHS:否 制造商:Texas Instruments 每芯片元件:1 邏輯系列:LVC 邏輯類型:Monostable Multivibrator 封裝 / 箱體:SSOP-8 傳播延遲時間:18.6 ns 高電平輸出電流:- 32 mA 低電平輸出電流:32 mA 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
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