参数资料
型号: 74HC688DB,112
厂商: NXP Semiconductors
文件页数: 2/7页
文件大小: 0K
描述: IC COMPARATOR MAGNITUDE 20SSOP
产品培训模块: Logic Packages
标准包装: 66
系列: 74HC
类型: 身份比较器
位数: 8
输出: 低有效
输出功能: A=B
电源电压: 2 V ~ 6 V
输出电流高,低: 5.2mA,5.2mA
额定电压和最大 CL 时的最大传播延迟: 29ns @ 6V,50pF
电流 - 静态: 8µA
工作温度: -40°C ~ 125°C
封装/外壳: 20-SSOP(0.209",5.30mm 宽)
安装类型: 表面贴装
包装: 管件
其它名称: 568-2728-5
935188760112
December 1990
2
Philips Semiconductors
Product specication
8-bit magnitude comparator
74HC/HCT688
FEATURES
Compare two 8-bit words
Output capability: standard
ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT688 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT688 are 8-bit magnitude comparators.
They perform comparison of two 8-bit binary or BCD
words.
The output provides P = Q.
QUICK REFERENCE DATA
GND = 0 V; Tamb =25 °C; tr =tf = 6 ns
Notes
1. CPD is used to determine the dynamic power dissipation (PD in W):
PD =CPD × VCC2 × fi + ∑ (CL × VCC2 × fo)
where:
fi = input frequency in MHz
fo = output frequency in MHz
∑ (CL × VCC2 × fo) = sum of outputs
CL = output load capacitance in pF
VCC = supply voltage in V
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC 1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
tPHL/ tPLH
propagation delay
CL = 15 pF; VCC =5 V
Pn, Qn to P = Q
1717ns
E to P = Q
8
12
ns
CI
input capacitance
3.5
pF
CPD
power dissipation capacitance per package
notes 1 and 2
30
pF
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