参数资料
型号: 74HC238DB,118
厂商: NXP Semiconductors
文件页数: 17/18页
文件大小: 0K
描述: IC 3:8 LINE DECODER/DEMUX 16SSOP
产品培训模块: Logic Packages
标准包装: 2,000
系列: 74HC
类型: 解码器/多路分解器
电路: 1 x 3:8
独立电路: 1
输出电流高,低: 5.2mA,5.2mA
电压电源: 单电源
电源电压: 2 V ~ 6 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.209",5.30mm 宽)
供应商设备封装: 16-SSOP
包装: 带卷 (TR)
其它名称: 74HC238DB-T
74HC238DB-T-ND
935189270118
74HC_HCT238_3
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 03 — 16 July 2007
8 of 18
NXP Semiconductors
74HC238; 74HCT238
3-to-8 line decoder/demultiplexer
[1]
tpd is the same as tPHL and tPLH.
[2]
tt is the same as tTHL and tTLH.
[3]
CPD is used to determine the dynamic power dissipation (PD in W):
PD =CPD × VCC2 × fi × N+ ∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
∑ (C
L × VCC
2
× f
o) = sum of outputs.
11. Waveforms
74HCT238
tpd
propagation delay
An to Yn; see Figure 6
VCC = 4.5 V
-
19
35
44
53
ns
VCC = 5.0 V; CL =15pF
-
18
-
ns
E3 to Yn; see Figure 6
VCC = 4.5 V
-
20
37
46
56
ns
VCC = 5.0 V; CL =15pF
-
20
-
ns
En to Yn or see Figure 7
VCC = 4.5 V
-
20
35
44
53
ns
VCC = 5.0 V; CL =15pF
-
21
-
ns
tt
transition time
VCC = 4.5 V;
-
7
15
19
22
ns
CPD
power dissipation
capacitance
per package;
VI = GND to VCC 1.5 V
-76-
-
pF
Table 7.
Dynamic characteristics
GND = 0 V; test circuit see Figure 8.
Symbol Parameter
Conditions
25
°C
40 °C to +125 °C
Min
Typ
Max
(85
°C)
Max
(125
°C)
Unit
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 6.
Input (An, E3) to output (Yn) propagation delays and output transition times
001aag757
An, E3 input
Yn output
tTHL
tTLH
VM
VX
VY
tPHL
tPLH
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