|
|
|
부품번호 | PCF1178C 기능 |
|
|
기능 | 4-digit duplex LCD car clock | ||
제조업체 | NXP Semiconductors | ||
로고 | |||
전체 20 페이지수
INTEGRATED CIRCUITS
DATA SHEET
PCF1178C
4-digit duplex LCD car clock
Product specification
Supersedes data of September 1993
File under Integrated Circuits, IC16
1997 Apr 16
Philips Semiconductors
4-digit duplex LCD car clock
Product specification
PCF1178C
FUNCTIONAL DESCRIPTION AND TESTING
Outputs
The circuit outputs 1 : 2 multiplexed data (duplex) to the
LCD. Generation of BP1 and BP2 (three-level backplane
signals) and the output signals are shown in Fig.4.
The average voltages across the segments are:
1. VON(RMS) = 0.79 VDD
2. VOFF(RMS) = 0.35 VDD.
A1 A2
A3 A4
AM
B1 F2
B2
G1 G2
F3 B3 F4 B4
G3 G4
COL
PM E1
C1 E2
C2 E3
C3 E4
C4
D1 D2
D3 D4
MLB251
Fig.2 Segment designation of LCD.
TIME
PM
(a)
a. 12-hour mode.
MSA993
TIME
MSA994
(b)
b. 24-hour mode.
Fig.3 Typical displays.
VDD
BP1 VDD /2
0
VDD
BP2 VDD /2
0
SEGMENT
1
ON
OFF
ON
OFF
SEGMENT
2
ON
VDD
0
VDD
ON
0
OFF
VDD
0
OFF
VDD
0
MSB226
15.625 ms
Fig.4 Backplane and output signals.
1997 Apr 16
4
4페이지 Philips Semiconductors
4-digit duplex LCD car clock
Product specification
PCF1178C
The number (n) is stored in a non-volatile memory which is achieved by the following steps (see Fig.6):
1. Set SEL to VSS and a level of VDD − 5 V to VPP
2. The quartz-frequency deviation ∆f/f is measured and (n) is calculated (see Table 1)
3. A first pulse tE is applied to the DATA input clears the EEPROM to give the highest backplane frequency
4. The calculated pulses (n) are entered in (tH, tL). If the maximum backplane period is reached and an additional pulse
is applied the period will return to the lowest value.
5. The backplane period is controlled and when correct fixed by applying the store pulse tW
6. Release SEL and VPP.
Table 1 Time calibration (∆t = 7.63 µs; SEL at VSS)
OSCILLATOR-FREQUENCY DEVIATION
∆f/f
(× 10−6)
0
+3.8
+7.6
+11.4
.
.
.
+117.8
NUMBER OF PULSES
(n)
0
1
2
3
.
.
.
31
BACKPLANE PERIOD
(ms)
15.625
15.633
15.641
15.648
.
.
.
15.861
1997 Apr 16
7
7페이지 | |||
구 성 | 총 20 페이지수 | ||
다운로드 | [ PCF1178C.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 |
PCF1178C | 4-digit duplex LCD car clock | NXP Semiconductors |
PCF1178CT | 4-digit duplex LCD car clock | NXP Semiconductors |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |