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부품번호 | DM7447A 기능 |
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기능 | BCD to 7-Segment Decoders/Drivers | ||
제조업체 | Fairchild Semiconductor | ||
로고 | |||
전체 6 페이지수
September 1986
Revised July 2001
DM7446A, DM7447A
BCD to 7-Segment Decoders/Drivers
General Description
The DM7446A and DM7447A feature active-LOW outputs
designed for driving common-anode LEDs or incandescent
indicators directly. All of the circuits have full ripple-blank-
ing input/output controls and a lamp test input. Segment
identification and resultant displays are shown on a follow-
ing page. Display patterns for BCD input counts above nine
are unique symbols to authenticate input conditions.
All of the circuits incorporate automatic leading and/or trail-
ing-edge, zero-blanking control (RBI and RBO). Lamp test
(LT) of these devices may be performed at any time when
the BI/RBO node is at a HIGH logic level. All types contain
an overriding blanking input (BI) which can be used to con-
trol the lamp intensity (by pulsing) or to inhibit the outputs.
Features
s All circuit types feature lamp intensity modulation
capability
s Open-collector outputs drive indicators directly
s Lamp-test provision
s Leading/trailing zero suppression
Ordering Code:
Order Number
DM7446AN
DM7447AN
Package Number
Package Description
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Connection Diagram
© 2001 Fairchild Semiconductor Corporation DS006518
www.fairchildsemi.com
DM7446A Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
VI Input Clamp Voltage
VOH HIGH Level Output
Voltage (BI/RBO)
ICEX
HIGH Level Output
Current (a thru g)
VOL LOW Level
Output Voltage
II Input Current @ Max
Input Voltage
VCC = Min, II = −12 mA
VCC = Min
IOH = Max
VCC = Max, VO = 30V
VIL = Max, VIH = Min
VCC = Min, IOL = Max
VIH = Min, VIL = Max
VCC = Max, VI = 5.5V
(Except BI/RBO)
IIH HIGH Level Input
Current
VCC = Max, VI = 2.4V
(Except BI/RBO)
IIL LOW Level Input
Current
IOS Short Circuit
Output Current
VCC = Max
VI = 0.4V
VCC = Max
(BI/RBO)
ICC Supply Current
VCC = Max
(Note 8)
Note 7: All typicals are at VCC = 5V, TA = 25°C.
Note 8: ICC is measured with all outputs OPEN and all inputs at 4.5V.
BI/RBO
Others
DM7446A Switching Characteristics
at VCC = 5V and TA = 25°C
Symbol
Parameter
tPLH Propagation Delay Time
LOW-to-HIGH Level Output
tPHL Propagation Delay Time
HIGH-to-LOW Level Output
CL = 15 pF
RL = 120Ω
Conditions
Typ
Min Max
(Note 7)
−1.5
2.4 3.7
Units
V
V
250 µA
0.3 0.4
V
1 mA
40
−4
−1.6
−4
µA
mA
mA
60 103 mA
Min
Max
Units
100 ns
100 ns
www.fairchildsemi.com
4
4페이지 | |||
구 성 | 총 6 페이지수 | ||
다운로드 | [ DM7447A.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 |
DM7447A | BCD to 7-Segment Decoders/Drivers | National Semiconductor |
DM7447A | DM7446A DM5447A DM7447A BCD to 7-Segment Decoders/Drivers (Rev. A) | Texas Instruments |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |