參數(shù)資料
型號(hào): OM13336,598
廠商: NXP Semiconductors
文件頁(yè)數(shù): 21/24頁(yè)
文件大小: 0K
描述: KIT 6 BOARDS DEMO LOGIC
特色產(chǎn)品: Demo Boards
標(biāo)準(zhǔn)包裝: 1
主要目的: 邏輯,二進(jìn)制計(jì)數(shù)器
嵌入式:
已用 IC / 零件: 74LVC169
主要屬性: 1.2 V ~ 3.6 V 輸入電壓
次要屬性: 內(nèi)置超前進(jìn)位功能
已供物品:
其它名稱(chēng): 568-5082
74LVC169EVB
74LVC169
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 6 — 29 November 2012
6 of 24
NXP Semiconductors
74LVC169
Presettable synchronous 4-bit up/down binary counter
6.
Functional description
[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 (HHHH) and terminal count down is (LLLL)
Table 3.
Function table[1]
Operating mode
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
Xqn
*
XX
Xh
Xqn
H
Fig 6.
State diagram
001aaa647
0
15
14
13
12
1
2
3
4
5
6
7
11
count down
count up
10
9
8
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