MC74VHC240_11 Datasheet, PDF (1/7 Pages) ON Semiconductor – Octal Bus Buffer/Line Driver Inverting with 3-State Outputs

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: t_PD = 3.6 ns (Typ) at V_CC = 5 V
• Low Power Dissipation: I_CC = 4 μA (Max) at T_A = 25°C
• High Noise Immunity: V_NIH = V_NIL = 28% V_CC
• Power Down Protection Provided on Inputs
• Balanced Propagation Delays
• Designed for 2 V to 5.5 V Operating Range
• Low Noise: V_OLP = 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 V_CC
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
Brochure, BRD8011/D.
FUNCTION TABLE
INPUTS
OEA, OEB
A, B
L
L
L
H
H
X
OUTPUTS
YA, YB
H
L
Z
© Semiconductor Components Industries, LLC, 2011
1
May, 2011 − Rev. 5
Publication Order Number:
MC74VHC240/D