ITT - Index of

GENERAL INFORMATION ITT54H/74H SERIES TTL FAMILY
This series is designed to be used in conjunction
with the 5417400 Series TTL in system locations
requiring minimum propagation delays. They form
a TTL family (Transistor-Transistor Logic) guaranteed
to operate over the following ambient temperature
ranges:
54H Series
74H Series
-55°Cto 125°C
O°C to 75°C
All devices operate over a frequency range between
D.C. and typically 30 and 50 MHz, and are fully
compatible with all 54H174H series TIL and 930
series DTL.
Clamping diodes are provided at the inputs to
enhance the inherent high noise immunity when
driving transmission lines. Most outputs are of
totem pole configuration to give good drive capability,
i.e.. high fan-out. especially into large
capacitive loads. Other outputs include an opencircuit
collector connection.
All functions are available in plastic or ceramic and
Flat Pack.
FEATURES
High speed-typical propagation delay (gate) of
6 ns. @ ~L = 25 pF
Guaranteed noise margin-greater than 400
mY.
Low power dissipation-23 mW per gate at
500"{' duty cycle.
Worst case fan-out of 1 O.
Low output impedance.
Logic levels guaranteed over range of supply
voltage and operating temperature
Compatible with other DTL, TTL logic series.
INDEX FOR STANDARD 7400H SERIES
For the military range, replace 74H in the type
number by 54H.
Prefix the type number by ITT and end with J which
indicates the ceramic dual-in-line package.
For example: ITT5400 is a Quad 2-input NAND gate
device in 54 series logic with a ceramic dual-in-line
package.
INTRODUCTION TO TTL
The TTL circuit configurations are designed so that
the uniform logic and noise margin levels apply to
all the standard devices in the families. Thus many
parameters and their limits are common. In addition
the operating conditions are identified for each family.
Once these standard operating conditions are
understood it becomes possible for the designer to
use the family by simply referring to the logic and
connection diagrams on each data sheet. All common
information is included in the remainder of this
section.
For ease of reading, the data only refers to the 74H
series family but it is equally applicable to the 54H
series. Where there are exceptions these are clearly
indicated on the individual data sheets concerned.
LOGIC DEFINITION
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~ Positive logic is used throughout the da,a sheets.
This is defined as follows.
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Logical '0' Low voltage; typically Oi2 V but
2.0V !
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Current flowing into a device terminal is defined as
positive.
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D.C. CHARACTERISTICS COMMON TO ALL
DEVICES (except where otherwise stated)
D.C. tests are carried out under the specified conditions.
All inputs and outputs are tested for all possible
logic states. Worst state load currents and
voltages are applied and the test limits are applicable
over the full temperature range. I
Min. Max. Unit
~,upp,ly voltage, V CC:
I '74H series
4.75 5.25 V
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54H series
4.5 5.5 V
Operating temperature:
74H series o 751°C
54H series -'55 125°C
D.C. noise margin typically greater than 1 V.
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