參數(shù)資料
型號(hào): N74F269DB,118
廠商: NXP Semiconductors
文件頁(yè)數(shù): 16/19頁(yè)
文件大?。?/td> 0K
描述: IC COUNTER 8BIT BINARY 24SSOP
產(chǎn)品培訓(xùn)模塊: Logic Packages
標(biāo)準(zhǔn)包裝: 1,000
系列: 74F
邏輯類型: 二進(jìn)制計(jì)數(shù)器
方向: 上,下
元件數(shù): 1
每個(gè)元件的位元數(shù): 8
計(jì)數(shù)速率: 115MHz
觸發(fā)器類型: 正邊沿
電源電壓: 4.5 V ~ 5.5 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 24-SSOP(0.209",5.30mm 寬)
供應(yīng)商設(shè)備封裝: 24-SSOP
包裝: 帶卷 (TR)
其它名稱: 935242010118
N74F269DB-T
N74F269DB-T-ND
74F269
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6 — 14 December 2011
6 of 19
NXP Semiconductors
74F269
8-bit bidirectional binary counter
6.
Functional description
6.1 Function table
[1]
H = HIGH voltage level steady state
h = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transition
L = LOW voltage level steady state
l = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transition
qn = Lower case letters indicate state of referenced output prior to the LOW-to-HIGH clock transition
X = don’t care
= LOW-to-HIGH clock transition
* = The TC is LOW when CET is LOW and the counter is at terminal count
Terminal count up is with all Qn outputs HIGH and terminal count down is with all Qn outputs LOW.
Table 3.
Function table[1]
Operating modes
Input
Output
CP
U/D
CEP
CET
PE
Dn
Qn
TC
Parallel load (Dn to Qn)
XX
XI
I
L
*
XX
Xl
h
H
*
Count up (increment)
h
I
h
X
count up
*
Count down (decrement)
I
h
X
count down
*
Hold (do nothing)
Xh
I
h
Xqn
*
XX
h
Xqn
H
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N74F269DB-T 功能描述:計(jì)數(shù)器 IC 8-BIT BIDIRECTIONAL BINARY CTR RoHS:否 制造商:NXP Semiconductors 計(jì)數(shù)器類型:Binary Counters 邏輯系列:74LV 位數(shù):10 計(jì)數(shù)法: 計(jì)數(shù)順序: 工作電源電壓:1 V to 5.5 V 工作溫度范圍:- 40 C to + 125 C 封裝 / 箱體:SOT-109 封裝:Reel
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N74F269N 制造商:Fairchild Semiconductor Corporation 功能描述:Bi-directional binary counter,N74F269N
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N74F269N-B 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Synchronous Up/Down Counter