•Shift right, shift left, and parallel load capability
•Asynchronous Master Reset
DESCRIPTION
The 74F198 Bidirectional Universal Shift Register is designed to
incorporate virtually all of the features a system designer may want
in a shift register. This circuit features parallel inputs and outputs,
shift right and shift left serial inputs, operating mode select inputs,
and direct overriding master reset input. The register has four
distinct modes of operation:
– Parallel (broadside) load
– Shift right (in the direction Q0 toward Q7)
– Shift left (in the direction Q7 toward Q0)
– Inhibit clock (do nothing).
Synchronous parallel loading is accomplished by applying the 8 bits
of data and taking both mode control inputs, S0 and S1, High. The
data is loaded into the associated flip-flop and appears at the
outputs after the positive transition of the clock inputs. During
loading, serial data flow is inhibited.
Shift right is accomplished synchronously, with the rising edge of the
clock pulse when S0 is High and S1 is Low. Serial data for this
mode is entered at the right data input (D
S1 is High, data shifts left synchronously and new data is entered at
the shift-left serial input (D
SL
).
Clocking of the flip-flops is inhibited when both mode control inputs
are Low.
). When S0 is Low and
SR
PIN CONFIGURATION
1
S0
2
D
SR
3
D0
4
Q0
5
D1
6
Q1
7
D2
8
Q2
9
D3
10
Q3
11
CP
1213
GND
TYPETYPICAL f
TYPICAL SUPPL Y CURRENT
MAX
74F19895MHz73mA
24
23
22
21
20
19
18
17
16
15
14
SF00160
V
CC
S1
D
SL
D7
Q7
D6
Q6
D5
Q5
D4
Q4
MR
(TOTAL)
ORDERING INFORMATION
COMMERCIAL RANGE
DESCRIPTION
24-pin Plastic Slim
DIP (300mil)
24-pin Plastic SOLN74F198DSOT137-1
VCC = 5V ±10%,
T
= 0°C to +70°C
amb
N74F198NSOT222-1
PKG DWG #
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINSDESCRIPTION74F (U.L.) HIGH/LOWLOAD VALUE HIGH/LOW
H=High voltage level
L=Low voltage level
X=Don’t care
↑=Low-to-High transition of designated input
0…7=The level of steady input at inputs 0 through 7, respectively.
Q00, Q10, Q60, Q70= The level of Q0, Q1, Q6, Q7, respectively, before the indicated steady state input conditions were established.
Q0n, Q1n, Q6n, Q7n= The level of Q0, Q1, Q6, Q7, respectively, before the most recent Low-to-High clock transition.
(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
T
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
Operating free-air temperature range0 to +70°C
Storage temperature range–65 to +150°C
(Over recommended operating free-air temperature range unless otherwise noted.)
LIMITS
MINTYP
p
p
V
IK
I
I
I
IH
I
IL
I
OS
Input clamp voltageVCC = MIN, II = I
Input current at maximum input voltageVCC = MAX, VI = 7.0V100µA
High-level input currentVCC = MAX, VI = 2.7V20µA
Low-level input currentVCC = MAX, VI = 0.5V–0.6mA
Short-circuit output current
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
CC
= 5V, T
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
amb
= 25°C.
, the use of high-speed test apparatus and/or sample-and-hold
OS
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
SO24:plastic small outline package; 24 leads; body width 7.5 mmSOT137-1
74F198
1987 Oct 02
10
Page 11
Philips SemiconductorsProduct specification
8-bit bidirectional universal shift register
NOTES
74F198
1987 Oct 02
11
Page 12
Philips SemiconductorsProduct specification
8-bit bidirectional universal shift register
Data sheet status
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
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]
74F198
[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
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print codeDate of release: 10-98
Document order number:9397-750-05097
yyyy mmm dd
12
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