74F30240 Ver la hoja de datos (PDF) - Philips Electronics
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74F30240 Datasheet PDF : 10 Pages
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Philips Semiconductors
30Ω line drivers
Product specification
74F30240*, 74F30244
74F30240
74F30244
Octal 30Ω line driver with enable, inverting (open collector)
Octal 30Ω line driver with enable, non-inverting (open collecor)
FEATURES
• Ideal for driving transmission lines or backplanes. 160mA IOL ideal
for applications with impedance as low as 30Ω
• Guaranteed threshold voltages on the incident wave while driving
line as low as 30Ω
• High impedance NPN base inputs for reduced loading (20µA in
High and Low states)
• Ideal for applications which require high output drive and minimal
bus loading
• Octal interface
• 74F30240 inverting
• 74F30244 non-inverting
• Open-Collector outputs sink 160mA
• Multiple side pins are used for VCC and GND to reduce lead
inductance (improves speed and noise immunity)
• Available in 24-pin standard slim DIP (300mil) plastic, SOL or
CERDIP packages
DESCRIPTION
The 74F30240 and 74F30244 are high current open collector octal
buffers composed of eight inverters. The 74F30240 has inverting
data paths and the 74F30244 has non-inverting paths. Each device
has eight inverters with two Output Enables (OE0, OE1), each
controlling four outputs. Both drivers are designed to deal with the
low-impedance transmission line effects found on printed circuit
boards when fast edge rates are used. The 160mA IOL provides
ample power to achieve TTL switching voltages on the incident
wave.
TYPE
74F30240
74F30244
TYPICAL
PROPAGATION
DELAY
9.5ns
10.5ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
62.5mA
69mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
PACKAGE
DRAWING NUMBER
24-pin Plastic Slim DIP (300mil)
N74F30244N
SOT222-1
24–pin Plastic SOL1
N74F30244D
SOT137-1
NOTE:
1. Because of the high current sinking capability of these parts, the SOL package should only be used under the following conditions:
a. 50% duty cycle,
AND
b. 3/5 of remaining 50% driving ≤ 100mA (leaving the remaining 2/5 of the drive ≤ 160mA)
OR
c. use ≤ 450 linear feet per minute forced air or other thermal mounting techniques.
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F(U.L.)
HIGH/LOW
LOAD VALUE
HIGH/LOW
D0–D7
Data inputs
1.0/0.033
20µA/20µA
OE0–OE1
Output Enable inputs (Active Low)
1.0/0.033
20µA/20µA
Q0–Q7
Data outputs (OC) for 74F30240
OC/266.7
OC/160mA
Q0–Q7
Data outputs (OC) for 74F30244
OC/266.7
OC/160mA
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state. OC = Open Collector.
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08
2
853–1157 20619
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