|
|
|
부품번호 | M74HC648 기능 |
|
|
기능 | HC648 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE / INV. HC646 OCTAL BUS TRANSCEIVER/REGISTER 3-STATE | ||
제조업체 | ST Microelectronics | ||
로고 | |||
M74HC646
M74HC648
HC646 OCTAL BUS TRANSCEIVER/REGISTER (3-STATE)
HC648 OCTAL BUS TRANSCEIVER/REGISTER (3-STATE, INV.)
. HIGH SPEED
fMAX = 73 MHz (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) AT TA = 25 °C
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
IOH= IOL = 6 mA (MIN.)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS646/648
B1R
(Plastic Package)
M1R
(Micro Package)
ORDER CODES :
M74HCXXXM1R M74HCXXXB1R
DESCRIPTION
The M74HC646/648 are high speed CMOS OCTAL
BUS TRANSCEIVERS AND REGISTERS, (3-
STATE) fabricated in silicon gate C2MOS technol-
ogy. They have the same high speed performance
of LSTTL combined with true CMOS low power con-
sumption.
These devices consist of bus transceiver circuits
with 3-state output, D-type flip-flops, and control cir-
cuitry arranged for multiplexed transmission of data
directly from the input bus or from the internal reg-
isters. Data on the A or B bus will be clocked into the
registers on the low-to-high transition of the appro-
priate clock pin (Clock AB - or Clock BA). Enable (G)
and direction (DIR) pins are provided to control the
transceiver functions. In the transceiver mode, data
present at the high-impedance port may be stored
in either register or in both.
The select controls (Select AB select BA) can multi-
plex stored and real-time (transparent mode) data.
The direction control determines which bus will re-
ceive data when enable G is active (low).
In the isolation mode (enable G high), ”A” data may
be stored in one register and/or ”B” data may be
stored in the other register. When an output function
is disabled, the input function is still enabled and
may be used to store and transmit data. Only one
of the two buses, A or B, may be driven at a time.
All inputs are equipped with protection circuits
PIN CONNECTIONS (top view)
INPUT AND OUTPUT EQUIVALENT CIRCUIT
GAB, GAB, CAB,
SAB, SBA, CBA
A, B
October 1993
1/12
M74HC646/648
PIN DESCRIPTION
PIN No
1
2
3
4, 5, 6, 7, 8, 9, 10, 11
20, 19, 18, 17, 16, 15, 14, 13
21
22
23
12
24
SYMBOL
CLOCK AB
SELECT AB
GAB
A1 to A8
B1 to B8
G
SELECT BA
CLOCK BA
GND
VCC
IEC LOGIC SYMBOLS
HC646
NAME AND FUNCTION
A to B Clock Input (LOW to HIGH, Edge-Trigged)
Select A to B Source Input
Direction Control Input
A data Inputs/Outputs
B Data Inputs/Outputs
Output Enable Input (Active LOW)
Select B to A Source Input
B to A Clock Input (LOW to HIGH, Edge-Triggered)
Ground (0V)
Positive Supply Voltage
HC648
4/12
4페이지 M74HC646/648
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC CL
(V) (pF)
Value
TA = 25 oC
-40 to 85 oC
Min. Typ. Max. Min. Max.
Unit
tPLH Propagation Delay Time
tPHL (SELECT - BUS)
2.0
4.5 50
81 170
23 34
215
43 ns
6.0
20 29
37
2.0
4.5 150
98 210
28 42
265
53 ns
6.0
24 36
45
tPZL 3-State Output Enable Time
tPZH (G, DIR)
2.0
4.5 50 RL = 1 KΩ
84 175
24 35
220
44 ns
6.0
20 30
37
2.0
4.5 150 RL = 1 KΩ
102 215
29 43
270
54 ns
6.0
25 37
46
tPLZ Output Disable Time
tPHZ (G, DIR)
2.0
4.5 50 RL = 1 KΩ
60 175
23 35
220
44 ns
6.0
20 30
37
fMAX Maximum Clock Frequency
2.0
4.5 50
6 19
4.8
30 67 24 MHz
6.0
35 79
28
tW(H)
tW(L)
Minimum Clock Pulse Width
2.0
4.5 50
30 75
7 15
95
19 ns
6.0
6 13
16
ts Minimum Set-up Time
2.0
4.5 50
16 50
4 10
65
13 ns
6.0
39
11
th Minimum Hold Time
2.0
4.5 50
55
5 5 ns
6.0 5 5
CIN Input Capacitance
5 10
10 pF
CI/O Bus Terminal Capacitance
10 pF
CPD (*) Power Dissipation Capacitance
for HC646
for HC648
39
38
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC/8 (per bit)
7/12
7페이지 | |||
구 성 | 총 12 페이지수 | ||
다운로드 | [ M74HC648.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 |
M74HC640 | OCTAL BUS TRANSCEIVER 3-STATE: HC245 NON INVERTING HC640 INVERTING / HC643 INVERTING/NON INVERTING | ST Microelectronics |
M74HC643 | OCTAL BUS TRANSCEIVER WITH 3 STATE OUTPUTS INVERTING/NON INVERTING | ST Microelectronics |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |