74HCU04D 查看數據表（PDF） - Philips Electronics
零件编号
产品描述 (功能)
生产厂家
74HCU04D Datasheet PDF : 7 Pages
| |||
Philips Semiconductors
Hex inverter
Product specification
74HCU04
C1 = 47 pF (typ.)
C2 = 33 pF (typ.)
R1 = 1 to 10 MΩ (typ.)
R2 optimum value depends on the frequency and required
stability against changes in VCC or average minimum ICC
(ICC is typically 5 mA at VCC = 5 V and f = 10 MHz).
Fig.13 Crystal oscillator configuration.
f = T-1-- ≈ 2----.--2--1--R-----C---
RS ≈ 2 × R.
The average ICC (mA) is approximately
3.5 + 0.05 × f (MHz) × C (pF) at VCC = 5.0 V
(for more information refer to “DESIGNERS GUIDE”).
Fig.14 HCU04 used as an astable multivibrator
OPTIMUM VALUE FOR R2
FREQUENCY R2
(MHz)
(kΩ)
OPTIMUM FOR
2
minimum required ICC
3
8 minimum influence due to
change in VCC
6
1
minimum ICC
4.7 minimum influence by VCC
10
0.5 minimum ICC
2 minimum influence by VCC
14
0.5 minimum ICC
1 minimum influence by VCC
> 14
replace R2 by C3 with a typical
value of 35 pF
EXTERNAL COMPONENTS FOR RESONATOR
(f < 1 MHz)
FREQUENCY
(kHz)
10 to 15.9
16 to 24.9
25 to 54.9
55 to 129.9
130 to 199.9
200 to 349.9
350 to 600
R1
(MΩ)
22
22
22
22
22
10
10
R2
(kΩ)
220
220
100
100
47
47
47
C1
(pF)
56
56
56
47
47
47
47
C2
(pF)
20
10
10
5
5
5
5
Note
1. All values given are typical and must be used as an
initial set-up.
(1) VCC = 2.0 V.
(2) VCC = 3.0 V.
(3) VCC = 4.0 V.
(4) VCC = 5.0 V.
(5) VCC = 6.0 V.
Fig.15 Typical input capacitance as a function of
input voltage.
Note to Application information
All values given are typical unless otherwise specified.
PACKAGE OUTLINES
See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.
September 1993
7
Share Link: 