參數(shù)資料
型號: 74HC238DB,112
廠商: NXP Semiconductors
文件頁數(shù): 17/18頁
文件大?。?/td> 0K
描述: IC 3-8 LINE DECOD/DEMUX 16-SSOP
產(chǎn)品培訓(xùn)模塊: Logic Packages
標(biāo)準(zhǔn)包裝: 78
系列: 74HC
類型: 解碼器/多路分解器
電路: 1 x 3:8
獨立電路: 1
輸出電流高,低: 5.2mA,5.2mA
電壓電源: 單電源
電源電壓: 2 V ~ 6 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 16-SSOP
包裝: 管件
產(chǎn)品目錄頁面: 833 (CN2011-ZH PDF)
其它名稱: 568-2646-5
935189270112
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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