参数资料
型号: 74HCT85DB,112
厂商: NXP Semiconductors
文件页数: 5/9页
文件大小: 0K
描述: IC COMPARATOR MAGNITUDE 16SSOP
产品培训模块: Logic Packages
标准包装: 1,092
系列: 74HCT
类型: 幅值比较器
位数: 4
输出: 高有效
输出功能: A<B,A=B,A>B
电源电压: 4.5 V ~ 5.5 V
输出电流高,低: 4mA,4mA
额定电压和最大 CL 时的最大传播延迟: 44ns @ 4.5V,50pF
电流 - 静态: 8µA
工作温度: -40°C ~ 125°C
封装/外壳: 16-SSOP(0.209",5.30mm 宽)
安装类型: 表面贴装
包装: 管件
Technical Note
BU1571KN
5/8
www.rohm.com
2010.06 - Rev.C
2010 ROHM Co., Ltd. All rights reserved.
Timing Chart
1. Two-line serial interface
1.1 Two-line serial interface timing
Table 1 I
2C Interface timing
Symbol
Parameter
MIN.
TYP.
MAX.
Unit
fSCL
SDC Clock Frequency
0
-
400
kHz
tHD;STA
Hold-time(repetition)『START』conditions
(The first clock pulse is generated after this period.)
0.6
-
s
fLOW
The "L" period of SDC clock
1.3
-
s
tHIGH
The "H" period of SDC clock
0.6
-
s
tSU;STA
Setup time of repetitive 『START』conditions
0.6
-
s
tHD;DAT
Hold time of SDA
0
-
s
tSU;DAT
Setup time of SDA
100
-
ns
tSU;STO
Setup time of the 『STOP』conditions
0.6
-
s
tBUF
BUS free time between 『STOP』conditions and the 『START』conditions
1.3
-
s
2. Camera module interface
2.1. Camera module interface timing
The input timing of camera image signal on camera I/F is shown in Table 2.
The input timing of camera image signal on camera I/F is shown in Table 2.1-2.
Symbol
Explanation
MIN. TYP. MAX. UNIT
tPCLK
Clock Cycle
19.2
-
ns
dPCLK
Clock Duty
45
50
55
%
tPDV
Decision of CAMDO from
CAMCKO
-
5
ns
tPHL,
tPHH
Decision of CAMVSO or
CAMHSO from CAMCKO
-
5
ns
Symbol
Explanation
MIN. TYP. MAX. UNIT
tCMS
CAMCKI Rise / Fall
Camera set-up Time
4
-
ns
tCMH
CAMCKI Rise / Fall
Camera Hold Time
4
-
ns
tLOW
SDA
SDC
tHD;STA
tHD;DAT
tHIGH
tSU;DAT
tSU;STA
tHD;ST
tSU;STO
tBUF
Table 2. BU1571KN timing (Camera data input)
Table 2.
Camera data output timing
CAMVSI
CAMHSI
CAMDI0
CAMDI7
CAMCKI
(CKPOL=“1”)
CAMCKI
(CKPOL=“0”)
tCMS
tCMH
CAMVSO
CAMDO[7:0]
CAMHSO
CAMCKO
tPCLK
tPHH
tPHL
tPDV
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