參數(shù)資料
型號(hào): 74HC4040
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: 12-stage binary ripple counter
中文描述: 12位的二進(jìn)制紋波計(jì)數(shù)器
文件頁數(shù): 1/24頁
文件大?。?/td> 137K
代理商: 74HC4040
1.
General description
The 74HC4040; 74HCT4040 are high-speed Si-gate CMOS devices and are pin
compatible with the HEF4040B series. They are specified in compliance with JEDEC
standard no. 7A.
The 74HC4040; 74HCT4040 are 12-stage binary ripple counters with a clock input (CP),
an overriding asynchronous master reset input (MR) and twelve parallel outputs (Q0 to
Q11). The counter advances on the HIGH-to-LOW transition of CP.
A HIGH on MR clears all counter stages and forces all outputs LOW, independent of the
state of CP.
Each counter stage is a static toggle flip-flop.
2.
Features
I
Multiple package options
I
Complies with JEDEC standard no. 7A
I
ESD protection:
N
HBM JESD22-A114-C exceeds 2000 V
N
MM JESD22-A115-A exceeds 200 V
I
Specified from
40
°
C to +85
°
C and from
40
°
C to +125
°
C
3.
Applications
I
Frequency dividing circuits
I
Time delay circuits
I
Control counters
4.
Quick reference data
74HC4040; 74HCT4040
12-stage binary ripple counter
Rev. 03 — 14 September 2005
Product data sheet
Table 1:
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns.
Symbol
Parameter
Type 74HC4040
t
PHL
, t
PLH
propagation delay
CP to Q0
Qn to Qn+1
Quick reference data
Conditions
Min
Typ
Max
Unit
C
L
= 15 pF; V
CC
= 5 V
C
L
= 15 pF; V
CC
= 5 V
-
-
14
8
-
-
ns
ns
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