参数资料
型号: EM78459
英文描述: Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 14-SOIC
中文描述: 8位微控制器的通用产品
文件页数: 52/57页
文件大小: 854K
代理商: EM78459
EM78458/459
MASK ROM
This specification is subject to change without prior notice.
2002/03/01
56
6.2 AC Electrical Characteristic (Ta=0
°C ~ 70 °C, VDD=5V±5%, VSS=0V)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Dclk
Input CLK duty cycle
45
50
55
%
Tins
Instruction cycle time
(CLKS="0")
Crystal type
RC type
100
500
DC
ns
Ttcc
TCC input period
(Tins+20)/N*
ns
Tdrh
Device reset hold time
Ta = 25
°C
9
18
30
ms
Trst
/RESET pulse width
Ta = 25
°C
2000
ns
Twdt
Watchdog timer period
Ta = 25
°C
9
18
30
ms
Tset
Input pin setup time
0
ms
Thold
Input pin hold time
20
ms
Tdelay
Output pin delay time
Cload=20pF
50
ms
*N= selected prescaler ratio.
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EM78450 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0&degC to 70°C; Package: 16-QFN
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