파트넘버.co.kr 74AC299 데이터시트 PDF


74AC299 반도체 회로 부품 판매점

8-Input Universal Shift/Storage Register



Fairchild Semiconductor 로고
Fairchild Semiconductor
74AC299 데이터시트, 핀배열, 회로
July 1988
Revised November 1999
74AC299 74ACT299
8-Input Universal Shift/Storage Register
with Common Parallel I/O Pins
General Description
The AC/ACT299 is an 8-bit universal shift/storage register
with 3-STATE outputs. Four modes of operation are possi-
ble: hold (store), shift left, shift right and load data. The par-
allel load inputs and flip-flop outputs are multiplexed to
reduce the total number of package pins. Additional out-
puts are provided for flip-flops Q0, Q7 to allow easy serial
cascading. A separate active LOW Master Reset is used to
reset the register.
Features
s ICC and IOZ reduced by 50%
s Common parallel I/O for reduced pin count
s Additional serial inputs and outputs for expansion
s Four operating modes: shift left, shift right, load
and store
s 3-STATE outputs for bus-oriented applications
s Outputs source/sink 24 mA
s ACT299 has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74AC299SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74AC299SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74AC299MTC
MTC20
20-Lead Thin Shrwinwkw.DSamtaSahlleeOt4uUt.lcinome Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74AC299PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
74ACT299SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74ACT299MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ACT299PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
CP
DS0
DS7
S0, S1
MR
OE1, OE2
I/O0I/O7
Q0, Q7
Description
Clock Pulse Input
Serial Data Input for Right Shift
Serial Data Input for Left Shift
Mode Select Inputs
Asynchronous Master Reset
3-STATE Output Enable Inputs
Parallel Data Inputs or
3-STATE Parallel Outputs
Serial Outputs
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS009893
www.fairchildsemi.com


74AC299 데이터시트, 핀배열, 회로
Logic Symbols
IEEE/IEC
Truth Table
Inputs
Response
MR S1 S0 CP
L X X X Asynchronous Reset; Q0Q7 = LOW
H H H
Parallel Load; I/On Qn
H L H
Shift Right; DS0 Q0, Q0 Q1, etc.
H H L
Shift Left, DS7 Q7, Q7 Q6, etc.
H L L X Hold
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
= LOW-to-HIGH Transition
Functional Description
The AC/ACT299 contains eight edge-triggered D-type flip-
flops and the interstage logic necessary to perform syn-
chronous shift left, shift right, parallel load and hold opera-
tions. The type of operation is determined by S0 and S1, as
shown in the Truth Table. All flip-flop outputs are brought
out through 3-STATE buffers to separate I/O pins that also
serve as data inputs in the parallel load mode. Q0 and Q7
are also brought out on other pins for expansion in serial
shifting of longer words.
A LOW signal on MR overrides the Select and CP inputs
and resets the flip-flops. All other state changes are initi-
ated by the rising edge of the clock. Inputs can change
when the clock is in either state provided only that the rec-
ommended setup and hold times, relative to the rising edge
of CP, are observed.
A HIGH signal on either OE1 or OE2 disables the 3-STATE
buffers and puts the I/O pins in the high impedance state.
In this condition the shift, hold, load and reset operations
can still occur. The 3-STATE buffers are also disabled by
HIGH signals on both S0 and S1 in preparation for a paral-
lel load operation.
www.fairchildsemi.com
2




PDF 파일 내의 페이지 : 총 11 페이지

제조업체: Fairchild Semiconductor

( fairchild )

74AC299 register

데이터시트 다운로드
:

[ 74AC299.PDF ]

[ 74AC299 다른 제조사 검색 ]




국내 전력반도체 판매점


상호 : 아이지 인터내셔날

전화번호 : 051-319-2877

[ 홈페이지 ]

IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈

( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )

전력반도체 문의 : 010-3582-2743



일반적인 전자부품 판매점


디바이스마트

IC114

엘레파츠

ICbanQ

Mouser Electronics

DigiKey Electronics

Element14


관련 데이터시트


74AC299

8-Input Universal Shift/Storage Register - Fairchild Semiconductor



74AC299

8 BIT PIPO SHIFT REGISTER - STMicroelectronics