Octal Bus Buffer/Line Driver - ON Semiconductor
Description
MC74VHC240
Octal Bus Buffer/Line Driver
Inverting with 3-State Outputs
The MC74VHC240 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 MC74VHC240 is an inverting 3−state buffer, and has two active−low output enables.
This device is designed to drive bus lines or buffer memory address registers.
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.
6 ns (Typ) at VCC = 5 V • Low Power Dissipation: ICC = 4 μA (Max) at TA = 25°C • High Noise Immunity: VNIH = VNIL = 28% VCC • Power Down Protection Provided on Inputs • Balanced Propagation Delays • Designed for 2 V to 5.
5 V Operating Range • Low Noise: VOLP = 0.
9 V (Max) • Pin and Function Compatible with Other Standard Logic Families • Latchup Performance Exceeds 300 mA • ESD Performance: HBM > 2000 V; Machine Model > 200 V • Chip Complexity: 120 FETs or 30 Equivalent Gates • These Devices are Pb−Free and are RoHS Compliant
OEA 1 A1 2
YB4 3 A2 4
YB3 5 A3 6
YB2 7 A4 8
YB1 9 GND 10
20 VCC 19 OEB 18 YA1 17 B4 16 YA2 15 B3 14 YA3 13 B2 12 YA4 11 B1
Figure 1.
Pin Assignment
http://onsemi.
com
20
1 SOIC−20 DW SUFFIX CASE 751D
MARKING DIAGRAMS
20
VHC240 AWLYYWWG
1
20
1 TSSOP−20 DT SUFFIX CASE 948E
20
VHC 240 ALYWG
G 1
VHC240 A WL, L Y WW, W G or G
= Specific Device Code = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
Package Shipping†
MC74VHC240DWR2G SOIC−20 1000 Units/Reel MC74VHC240DTR2G TSSOP−20 2500 Units/Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochu...
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