* Discontinued part. Please see the Discontinued Product List in Section 1, page 21.
Product specification1996 Jan 29
IC15 Data Handbook
Page 2
Philips SemiconductorsProduct specification
DRAWING
74F161A, 74F163A4-bit binary counters
FEA TURES
•Synchronous counting and loading
•Two count enable inputs for n-bit cascading
•Positive edge-triggered clock
•Asynchronous Master Reset (74F161A)
•Synchronous Reset (74F163A)
•High speed synchronous expansion
•Typical count rate of 130MHz
•Industrial range (–40°C to +85°C) available
DESCRIPTION
4-bit binary counters feature an internal carry look-ahead and can be
used for high-speed counting. Synchronous operation is provided by
having all flip-flops clocked simultaneously on the positive-going
edge of the clock. The clock input is buffered.
The outputs of the counters may be preset to High or Low level. A
Low level at the Parallel Enable (PE
action and causes the data at the D0–D3 inputs to be loaded into
the counter on the positive-going edge of the clock (provided that
the setup and hold requirements for PE
regardless of the levels at Count Enable (CEP, CET) inputs.
) input disables the counting
are met). Preset takes place
A Low level at the Master Reset (MR
of the flip-flops (Q0 – Q3) in 74F161A to Low levels, regardless of
the levels at CP, PE, CET and CEP inputs (thus providing an
asynchronous clear function). For the 74F163A, the clear function is
synchronous. A Low level at the Synchronous Reset (SR
all four outputs of the flip-flops (Q0 – Q3) to Low levels after the next
positive-going transition on the clock (CP) input (provided that the
setup and hold time requirements for SR
occurs regardless of the levels at PE
synchronous reset feature enables the designer to modify the
maximum count with only one external NAND gate (see Figure 1).
The carry look-ahead simplifies serial cascading of the counters.
Both Count Enable (CEP and CET) inputs must be High to count.
The CET input is fed forward to enable the TC output. The TC
output thus enabled will produce a High output pulse of a duration
approximately equal to the High level output of Q0. This pulse can
be used to enable the next cascaded stage (see Figure 2). The TC
output is subjected to decoding spikes due to internal race
conditions. Therefore, it is not recommended for use as clock or
asynchronous reset for flip-flops, registers, or counters.
H=High voltage level
h=High voltage level one setup prior to the Low-to-High clock transition
L=Low voltage level
l=Low voltage level one setup prior to the Low-to-High clock transition
=Lower case letters indicate the state of the referenced output prior to the Low-to-High clock transition
q
n
X=Don’t care
↑=Low-to-High clock transition
(1) =The TC output is High when CET is High and the counter is at Terminal Count (HHHH for 74F161A)
(2) =The TC output is High when CET is High and the counter is at Terminal Count (HHHH for 74F163A)
(2)
L
74F161A LOGIC DIAGRAM
2
CP
1
MR
9
PE
10
CET
7
CEP
3
D0
4
D1
5
D2
R
DCPQ
R
DCPQ
R
DCPQ
14
Q
Q
Q
Q0
13
Q1
12
Q2
VCC = Pin 16
GND = Pin 8
1996 Jan 29
6
D3
R
DCPQ
11
15
SF00662
Q3
TC
Q
5
Page 6
Philips SemiconductorsProduct specification
T
Operating free-air temperature range
74F161A, 74F163A4-bit binary counters
74F163A LOGIC DIAGRAM
2
CP
1
SR
9
PE
10
CET
7
CEP
3
D0
DCPQ
14
Q
4
D1
DCPQ
Q0
5
D2
6
D3
VCC = Pin 16
GND = Pin 8
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free-air temperature range.)
SYMBOL
V
CC
V
IN
I
IN
V
OUT
I
OUT
amb
T
stg
Supply voltage–0.5 to +7.0V
Input voltage –0.5 to +7.0V
Input current–30 to +5mA
Voltage applied to output in High output state–0.5 to V
Current applied to output in Low output state40mA
p
p
Storage temperature range–65 to +150°C
PARAMETERRATINGUNIT
Commercial range0 to +70°C
Industrial range–40 to +85°C
DCPQ
DCPQ
13
12
11
15
SF00663
Q1
Q2
Q3
TC
V
Q
Q
Q
CC
1996 Jan 29
6
Page 7
Philips SemiconductorsProduct specification
SYMBOL
PARAMETER
UNIT
T
Operating free-air temperature range
SYMBOL
PARAMETER
TEST CONDITIONS
1
UNIT
VOHHigh-level output voltage
CC
,
IL
,
I
MAX
VOLLow-level output voltage
CC
,
IL
,
I
MAX
IILLow-level input current
V
MAX, V
5V
ICCSupply current (total)
V
MAX
74F161A, 74F163A4-bit binary counters
RECOMMENDED OPERATING CONDITIONS
LIMITS
MINNOMMAX
V
CC
V
IH
V
IL
I
IK
I
OH
I
OL
amb
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
V
IK
I
I
I
IH
I
OS
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at V
3. Not more than one output should be shorted at a time. For testing I
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, I
* Discontinued part. Please see the Discontinued Product List in Section 1, page 21.
1996 Jan 29
11
Page 12
Philips SemiconductorsProduct specification
4-bit binary counters
SO16:plastic small outline package; 16 leads; body width 3.9 mmSOT109-1
74F162A
*, 74F163A
74F160A*, 74F161A,
* Discontinued part. Please see the Discontinued Product List in Section 1, page 21.
1996 Jan 29
12
Page 13
Philips SemiconductorsProduct specification
4-bit binary counters
NOTES
74F160A*, 74F161A,
74F162A
*, 74F163A
* Discontinued part. Please see the Discontinued Product List in Section 1, page 21.
1996 Jan 29
13
Page 14
Philips SemiconductorsProduct specification
4-bit binary counter
Data sheet status
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
74F160A*, 74F161A,
74F162A*, 74F163A
Definition
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
[1]
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
* Discontinued part. Please see the Discontinued Product List in Section 1, page 21.
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print codeDate of release: 10-98
Document order number:9397-750-05084
yyyy mmm dd
14
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