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參數資料
| 型號： | HEF4938BT |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 振蕩器 |
| 英文描述： | Dual precision monostable multivibrator |
| 封裝： | HEF4938BT<SOT109-1 (SO16)|<<http://www.nxp.com/packages/SOT109-1.html<1<week 6, 2004,;HEF4938BT<SOT109-1 (SO16)|<<http://www.nxp.com/packages/SOT109-1.html<1<week 6 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 155K |
| 代理商： | HEF4938BT |
1.
General description
The HEF4938B is a dual retriggerable-resettable monostable multivibrator. Each
multivibrator has an active LOW trigger/retrigger input (nA), an active HIGH
trigger/retrigger input (nB), an overriding active LOW direct reset input (nCD), an output
(nQ) and its complement (nQ), and two pins (CEXT, always connected to ground, and
nREXT/CEXT) for connecting the external timing components C
EXT
and R
EXT
. The typical
pulse width variation over the specified temperature range is
±
0.2 %.
The multivibrator 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
EXT
and R
EXT
. The output pulse width (t
W
) is equal to R
EXT
×
C
EXT
.
The linear design techniques in LOCMOS (Local Oxide CMOS) guarantee precise control
of the output pulse width. A LOW level at nCD terminates the output pulse immediately.
The trigger inputs’ Schmitt trigger action makes the circuit highly tolerant of slower rise
and fall times.
It operates over a recommended V
DD
power supply range of 3 V to 15 V referenced to V
SS
(usually ground). Unused inputs must be connected to V
DD
, V
SS
, or another input. It is
suitable for use over the full industrial (
40
°
C to +85
°
C) temperature range.
2.
Features
Separate reset inputs
Triggering from leading or trailing edge
Tolerant of slow trigger rise and fall times
Fully static operation
5 V, 10 V, and 15 V parametric ratings
Standardized symmetrical output characteristics
Operates across the full industrial temperature range
40
°
C to +85
°
C
Complies with JEDEC standard JESD 13-B
3.
Applications
Industrial
HEF4938B
Dual precision monostable multivibrator
Rev. 05 — 6 January 2010
Product data sheet
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相關代理商/技術參數 |
參數描述 |
|---|---|
| HEF4938BT,112 | 功能描述:單穩態多諧振蕩器 2 RETRIG PREC 1STBLE 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 |
| HEF4938BT,118 | 功能描述:單穩態多諧振蕩器 2 RETRIG PREC 1STBLE 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 |
| HEF4938BT-T | 功能描述:單穩態多諧振蕩器 2 RETRIG PREC 1STBLE 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 |
| HEF4952BT | 功能描述:多路器開關 IC SMALL SIGNAL SWITCH RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
| HEF4952BT,112 | 功能描述:多路器開關 IC SMALL SIGNAL SWITCH RoHS:否 制造商:Texas Instruments 通道數量:1 開關數量:4 開啟電阻（最大值）:7 Ohms 開啟時間（最大值）: 關閉時間（最大值）: 傳播延遲時間:0.25 ns 工作電源電壓:2.3 V to 3.6 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:UQFN-16 |
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