參數(shù)資料
型號(hào)： MC74VHC244
廠商： ON SEMICONDUCTOR
英文描述： Octal Bus Buffer
中文描述： 八路總線緩沖器
文件頁(yè)數(shù)： 1/6頁(yè)
文件大小： 165K
代理商： MC74VHC244
SEMICONDUCTOR TECHNICAL DATA
1
REV 1
Motorola, Inc. 1997
6/97
The MC74VHC244 is an advanced high speed CMOS octal bus buffer
fabricated with silicon gate CMOS technology. It achieves high speed
operation similar to equivalent Bipolar Schottky TTL while maintaining
CMOS low power dissipation.
The MC74VHC244 is a noninverting 3–state buffer, and has two
active–low output enables. This device is designed to be used with 3–state
memory address drivers, etc.
The internal circuit is composed of three stages, including a buffer output
which provides high noise immunity and stable output. The inputs tolerate
voltages up to 7V, allowing the interface of 5V systems to 3V systems.
High Speed: tPD = 3.9ns (Typ) at VCC = 5V
Low Power Dissipation: ICC = 4
μ
A (Max) at TA = 25
°
C
High Noise Immunity: VNIH = VNIL = 28% VCC
Power Down Protection Provided on Inputs
Balanced Propagation Delays
Designed for 2V to 5.5V Operating Range
Low Noise: VOLP = 0.9V (Max)
Pin and Function Compatible with Other Standard Logic Families
Latchup Performance Exceeds 300mA
ESD Performance: HBM > 2000V; Machine Model > 200V
Chip Complexity: 136 FETs or 34 Equivalent Gates
LOGIC DIAGRAM
DATA
INPUTS
A1
A2
A3
A4
B1
B2
B3
B4
17
15
13
11
8
6
4
2
18
16
14
12
9
7
5
3
YB4
YB3
YB2
YB1
YA4
YA3
YA2
YA1
NONINVERTING
OUTPUTS
OUTPUT
ENABLES
OEA
OEB
1
19
OEA, OEB
A, B
YA, YB
L
L
H
L
H
X
L
H
Z
INPUTS
OUTPUTS
FUNCTION TABLE
PIN ASSIGNMENT
A3
A2
YB4
A1
OEA
GND
YB1
A4
YB2
YB3
5
4
3
2
1
10
9
8
7
6
14
15
16
17
18
19
20
11
12
13
YA2
B4
YA1
OEB
VCC
B1
YA4
B2
YA3
B3
DW SUFFIX
20–LEAD SOIC PACKAGE
CASE 751D–04
ORDERING INFORMATION
MC74VHCXXXDW
MC74VHCXXXDT
MC74VHCXXXM
SOIC
TSSOP
SOIC EIAJ
DT SUFFIX
20–LEAD TSSOP PACKAGE
CASE 948E–02
M SUFFIX
20–LEAD SOIC EIAJ PACKAGE
CASE 967–01
相關(guān)PDF資料
PDF描述
MC74VHC244DT Octal Bus Buffer
MC74VHC244DW Octal Bus Buffer
MC74VHC244M Octal Bus Buffer
MC74VHC245 Octal Bus Transceiver
MC74VHC245DT Octal Bus Transceiver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC74VHC244DT 功能描述:緩沖器和線路驅(qū)動(dòng)器 2-5.5V Octal 3-State RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
MC74VHC244DTG 功能描述:緩沖器和線路驅(qū)動(dòng)器 2-5.5V Octal 3-State Non-Inverting RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
MC74VHC244DTR2 功能描述:緩沖器和線路驅(qū)動(dòng)器 2-5.5V Octal 3-State RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
MC74VHC244DTR2G 功能描述:緩沖器和線路驅(qū)動(dòng)器 LOG CMOS BUS INTRFCE OCTL RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
MC74VHC244DTR2G-CUT TAPE 制造商:ON 功能描述:MC74VHC244 Series 2 to 5.5 V CMOS 3 St Octal Noninverting Bus Buffer - TSSOP-20
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