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參數資料
型號: W6690
廠商: WINBOND ELECTRONICS CORP
英文描述: ISDN S/T Interface Controller(ISDN S/T接口控制器)
中文描述: 綜合業務數字網的S / T接口控制器(綜合業務數字網S / T的接口控制器)
文件頁數: 67/76頁
文件大小: 471K
代理商: W6690
Preliminary W6690
Publication Release Date: March 1998
- 67 -
Revision A1
Capacitances
T
A
= 25
°
C, V
DD
= 5 V
±
5%, V
SSA
= 0V, V
SSD
= 0V, fc = 1 MHz, unmeasured pins grounded.
PARAMETER
SYM.
MIN.
MAX.
UNIT
REMARKS
Input Capacitance
C
IN
7
pF
All pins except SR1, 2
I/O pin Capacitance
C
IO
7
pF
All pins except SR1, 2
Output Capacitance Against V
SSA
C
OUT
10
pF
SX1, 2
Input Capacitance
C
IN
7
pF
SR1, 2
Load Capacitance
C
L
50
pF
XTAL1, 2
Recommended oscillator circuits
Crystal specifications
PARAMETER
SYMBOL
VALUES
UNIT
Frequency
f
7.680
MHz
Frequency Calibration Tolerance
Max. 100
ppm
Load Capacitance
C
L
Max. 50
pF
Oscillator Mode
Fundamental
Note: The load capacitance C
L
depends on the crystal specification. The typical values are 33 to 47 pF.
External ocsillator input (XTAL1) clock characteristics
PARAMETER
MIN.
MAX.
Duty Cycle
1:2
2:1
50
XTAL1
XTAL2
51
7.68MHz
C
L
50 pF
C
L
C
L
50
XTAL1
XTAL2
51
External
oscillator
signal
N.C.
or
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