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參數資料
| 型號： | HEF4521BT |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 24-stage frequency divider and oscillator |
| 封裝： | HEF4521BP<SOT38-4 (DIP16)|<<http://www.nxp.com/packages/SOT38-4.html<1<Always Pb-free,;HEF4521BT<SOT109-1 (SO16)|<<http://www.nxp.com/packages/SOT109-1.html<1<week |
| 文件頁數： | 1/17頁 |
| 文件大小： | 106K |
| 代理商： | HEF4521BT |
1.
General description
The HEF4521B consists of a chain of 24 toggle flip-flops with an overriding asynchronous
master reset input (MR), and an input circuit that allows three modes of operation. The
single inverting stage (A2 to Y2) will function as: a crystal oscillator, an input buffer for an
external oscillator or in combination with A1 as an RC oscillator. The crystal oscillator
operates in Low-power mode when pins V
SS1
and V
DD1
are supplied via external resistors.
Each flip-flop divides the frequency of the previous flip-flop by two, consequently the
HEF4521B will count up to 2
24
= 16777216. The counting advances on the HIGH-to-LOW
transition of the clock (A2). The outputs from each of the last seven stages (2
18
to 2
24
) are
available for additional flexibility.
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
also suitable for use over the full industrial (
40
°
C to +85
°
C) temperature range.
2.
Features
I
Low power crystal oscillator operation
I
Fully static operation
I
5 V, 10 V, and 15 V parametric ratings
I
Standardized symmetrical output characteristics
I
Operates across the full industrial temperature range
40
°
C to +85
°
C
I
Complies with JEDEC standard JESD 13-B
3.
Applications
I
Industrial
4.
Ordering information
HEF4521B
24-stage frequency divider and oscillator
Rev. 05 — 5 November 2009
Product data sheet
Table 1.
All types operate from
40
°
C to +85
°
C.
Type number
Ordering information
Package
Name
DIP16
SO16
Description
plastic dual in-line package; 16-leads (300 mil)
plastic small outline package; 16 leads; body width 3.9 mm
Version
SOT38-4
SOT109-1
HEF4521BP
HEF4521BT
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相關代理商/技術參數 |
參數描述 |
|---|---|
| HEF4521BT,652 | 功能描述:增效器/分頻器 FREQ DIVIDER 24STG RoHS:否 制造商:Texas Instruments 產品:Multiplier 邏輯系列: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:Through Hole 封裝 / 箱體:PDIP-14 |
| HEF4521BT,653 | 功能描述:增效器/分頻器 24-STAGE FREQUENCY DIVIDER RoHS:否 制造商:Texas Instruments 產品:Multiplier 邏輯系列: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:Through Hole 封裝 / 箱體:PDIP-14 |
| HEF4521BT | 制造商:NXP Semiconductors 功能描述:IC 4000 LOCMOS SMD 4521 SOIC16 |
| HEF4521BT652 | 制造商:NXP Semiconductors 功能描述:IC 24 STAGE FREQ DIVIDER AND OSC SOIC- |
| HEF4521BTD | 功能描述:增效器/分頻器 FREQ DIVIDER 24STG RoHS:否 制造商:Texas Instruments 產品:Multiplier 邏輯系列: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:Through Hole 封裝 / 箱體:PDIP-14 |
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