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부품번호 | BU2185F 기능 |
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기능 | Clock generator | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
Multimedia ICs
Clock generator
BU2185F
This IC generates the different clock used for DVD. Generates clocks for CD use, sound use, and MPEG use.
•Applications
DVD players
•Features
1) By connecting a crystal oscillating element, the dif-
ferent clock signals are generated.
2) Enables selection of the reference clock directly or
with 1 / 2 output.
3) SOP 16-pin package.
4) Single 3.3V power supply.
5) With the standard clock output, an independent 5V
power supply can be applied for a 5V output.
•Block diagram
XTAL1 IN
XTAL1 OUT
XTAL1
OSC
DATA1A
DATA1B
PLL1
CLK2
(27.0000MHz )
CTRL1
SW
H
CTRL2
L
1/2
XTAL2 IN
XTAL 2OUT
XTAL2
OSC
PLL2
DATA2A
DATA2B
OE
CTRL1
H
L
H
L
CTRL2
L
L
H
H
SW PLL1
H DATA1A
L DATA1A
H DATA1B
L DATA1B
∗DATA1A = XTAL2 375 / 128 / 4
∗DATA1B = XTAL2 375 / 64 / 4
∗DATA2A = XTAL2 147 / 40 / 4
∗DATA2B = XTAL2 147 / 20 / 4
CLK1
(36.8640MHz)
(18.4320MHz)
CLK3
(33.8688MHz)
PLL2
DATA2A
DATA2A
DATA2B
DATA2B
1
Multimedia ICs
BU2185F
•Electrical characteristics (unless otherwise noted, Ta = 25°C, VDD (AVDD) = 3.3V, CL Ϲ 15PF, XTAL1 = shorted to
GND, XTAL2 = 36.864MHz, 18.43MHz) )
Parameter
Input low level voltage
Input high level voltage
Output low level voltage
Output high level voltage
Output low level voltage
Output high level voltage
Operating circuit current
Symbol
VIL
VIH
VOL
VOH
VOL
VOH
IDD
Min.
—
0.7 × VDD
—
2.4
—
DVDD-0.5
—
Typ.
—
—
—
—
—
—
40
Max.
0.3 × VDD
—
0.4
—
0.4
—
60
Unit
V
V
V
V
V
V
mA
Conditions
CTRL1, CTRL2, OE
CTRL1, CTRL2, OE
I OL = 4.0mA CLK1, CLK2, CLK3
I OH = – 4.0mA CLK1, CLK2, CLK3
I OL = 0.5mA XTAL1OUT, XTAL2OUT
I OH = – 0.5mA XTAL1OUT, XTAL2OUT
No load
〈When XTAL2 = 36.864MHz〉 (XTAL1 is shorted to GND)
CLK1 frequency1
CLK1-1
— 36.8640
CLK1 frequency2
CLK1-2
— 18.4320
CLK2 frequency
CLK2
— 27.0000
CLK3 frequency
CLK3
— 33.8688
—
—
—
—
MHz
MHz
MHz
MHz
XTAL2 output
CTRL1 = H, CTRL2 = L
XTAL2 1 / 2 output CTRL1 = L, CTRL2 = L
XTAL2 × 375 / 128 / 4 — CTRL2 = L
XTAL2 × 147 / 40 / 4 — CTRL2 = L
〈When XTAL2 = 18.432MHz〉 (XTAL1 is shorted to GND)
CLK1 frequency1
CLK1
— 18.4320
CLK2 frequency
CLK2
— 27.0000
CLK3 frequency
CLK3
— 33.8688
—
—
—
MHz
MHz
MHz
XTAL2 output CTRL1 = H, CTRL2 = H
XTAL2 × 375 / 64 / 4 — CTRL2 = H
XTAL2 × 147 / 20 / 4 — CTRL2 = H
DUTY
JITTER
JITTER
27MHz S / N
DUTY 45 50 55
% 1 / 2VDD
J1s — 100 — psec Reference value (1sigma)
Jabs
— 600 — psec Reference value (min.-to-max. width for jitter)
CLK2SN
—
65
—
dB 27MHz ± 20kHz RBW = 1kHz, SPAN = 200kHz
4
4페이지 | |||
구 성 | 총 6 페이지수 | ||
다운로드 | [ BU2185F.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
BU2185F | Clock generator | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |