HT82B40A HOLTEK [Holtek Semiconductor Inc], HT82B40A Datasheet - Page 5

• Manufacturer Part Number: HT82B40A
• Description: I/O MCU with USB Interface
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

A.C. Characteristics
Note:
Rev. 1.10
f
t
t
t
f
f
f
Symbol
RCSYS
WDT
OST
OSCsetup
INO125V
INO123V
INOUSB
t
Power_on period = t
WDT Time_out in Normal Mode = 1/ f
WDT Time_out in Power Down Mode = 1/ f
Trimmed for 5V operation using factory trim values. Frequency Trim to 12MHz 3%
SYS
RC Clock with 8-bit Prescaler Register
Watchdog Time-out Period
(System Clock)
USBD+, USBD- Rising & Falling Time
Oscillation Start-up Timer Period
Crystal Setup
Internal Oscillator Frequency for 12MHz
Internal Oscillator Frequency for 12MHz
Internal Oscillator Frequency with USB
Mode
=1/f
SYS
Parameter
WDT
+ t
OST
+ t
OSCsetup
RCSYS
RCSYS
256
4.0V~
5.5V
4.0V
5.5V
3.0~
4.2~
V
5V
DD
Test Conditions
5
256
WDTS + t
Conditions
WDTS + t
WDT
OST
10.80
10.56
11.82
1024
+ t
Min.
HT82B40R/HT82B40A
75
OSCsetup
12.00
12.00
12.00
1024
Typ.
32
5
September 4, 2009
13.20
13.44
12.18
Max.
300
1/f
Ta=25 C
MHz
MHz
MHz
Unit
kHz
t
RCSYS
ms
SYS
ns