SN74F193AD [TI]
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER WITH DUAL CLOCK AND CLEAR; 同步4位向上/向下二进制计数器，具有双时钟和CLEAR
| 型号： | SN74F193AD |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER WITH DUAL CLOCK AND CLEAR |
| 文件： | 总10页 (文件大小：275K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN74F193A
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER
WITH DUAL CLOCK AND CLEAR
SDFS031A – D3693, JANUARY 1991 – REVISED OCTOBER 1993
D OR N PACKAGE
(TOP VIEW)
• High-Speed f
of 100 MHz Typical
max
• Parallel Asynchronous Load for Modulo-N
Count Lengths
V
A
B
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CC
• Look-Ahead Circuitry Enhances Speed of
Q
B
A
Cascaded Counters
CLR
BO
CO
LOAD
C
Q
• Fully Synchronous in Count Modes
• Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
DOWN
UP
Q
Q
C
D
D
GND
description
The SN74F193A is a synchronous, 4-bit binary up/down counter. Synchronous counting operation is provided
by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so
instructed by the steering logic. This mode of operation eliminates the output counting spikes normally
associated with asynchronous (ripple-clock) counters.
The outputs of the four flip-flops are triggered on a low-to-high-level transition of either count/clock (UP or
DOWN) input. The direction of the count is determined by which count input is pulsed while the other count input
is high.
All four counters are fully programmable; that is, each output may be preset to either level by placing a low on
the LOAD input and entering the desired data at the data (D) inputs. The output will change to agree with the
data inputs independently of the count pulses. This feature allows the counters to be used as modulo-N dividers
by simply modifying the count length with the preset inputs.
A high level applied to the clear (CLR) input forces all outputs to the low level. The clear function is independent
of the count and load inputs.
These counters were designed to be cascaded without the need for external circuitry. The borrow (BO) output
produces a low-level pulse while the count is zero (all Q outputs low) and the DOWN input is low. Similarily, the
carry (CO) output produces a low-level pulse while the count is 15 (all Q outputs high) and the UP input is low.
The counters can then be easily cascaded by feeding the borrow and carry outputs to the count-down and
count-up inputs, respectively, of the succeeding counter.
The SN74F193A is characterized for operation from 0°C to 70°C.
Copyright 1993, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74F193A
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER
WITH DUAL CLOCK AND CLEAR
SDFS031A – D3693, JANUARY 1991 – REVISED OCTOBER 1993
†
logic symbol
state diagram
CTRDIV16
CT = 0
0
1
2
3
4
5
14
CLR
5
12
13
1CT = 15
CO
BO
UP
2+
G1
1–
G2
15
4
DOWN
2CT = 0
11
14
13
12
6
7
8
C3
LOAD
15
3
2
6
7
Q
A
A
1
3D
Q
B
B
10
C
9
Q
C
11
10
9
Q
D
D
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Count up
Count down
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74F193A
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER
WITH DUAL CLOCK AND CLEAR
SDFS031A – D3693, JANUARY 1991 – REVISED OCTOBER 1993
logic diagram (positive logic)
14
12
CLR
CO
13
11
BO
LOAD
5
UP
4
DOWN
S
R
15
A
S
C1
3
Q
A
1D
R
1
B
S
2
Q
B
C1
1D
R
10
C
S
6
Q
C
C1
1D
R
9
D
S
7
Q
D
C1
1D
R
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74F193A
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER
WITH DUAL CLOCK AND CLEAR
SDFS031A – D3693, JANUARY 1991 – REVISED OCTOBER 1993
typical clear, load, and count sequence
Illustrated below is the following sequence:
1. Clear outputs to zero
2. Load (preset) to binary thirteen
3. Count up to fourteen, fifteen (carry), zero, one, and two
4. Count down to one, zero (borrow), fifteen, fourteen, and thirteen
CLR
LOAD
A
B
Data
Inputs
C
D
UP
DOWN
Q
A
Q
B
Q
C
Q
D
Outputs
CO
BO
0
13
14
15
0
1
2
1
0
15
14
13
Sequence
Illustrated
Count Up
Count Down
Clear
Preset
2–4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74F193A
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER
WITH DUAL CLOCK AND CLEAR
SDFS031A – D3693, JANUARY 1991 – REVISED OCTOBER 1993
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
CC
Input voltage range, V (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.2 V to 7 V
I
Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA to 5 mA
Voltage applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to V
CC
Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 mA
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 °C to 70 °C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 150°C
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input-voltage ratings may be exceeded if the input-current ratings are observed.
recommended operating conditions
MIN NOM
MAX
UNIT
V
V
V
V
Supply voltage
4.5
2
5
5.5
CC
IH
IL
High-level input voltage
Low-level input voltage
Input clamp current
V
0.8
18
– 1
20
70
V
I
I
I
mA
mA
mA
°C
IK
High-level output current
Low-level output current
Operating free-air temperature
OH
OL
T
A
0
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
‡
PARAMETER
TEST CONDITIONS
I = – 18 mA
MIN TYP
MAX
UNIT
V
V
V
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 4.5 V,
= 4.5 V,
= 4.75 V,
= 4.5 V,
= 5.5 V,
= 5.5 V,
– 1.2
V
IK
I
I
I
I
= – 1 mA
2.5
2.7
3.4
0.3
OH
OH
OL
V
OH
OL
= – 1 mA to 3 mA
= 20 mA
0.5
0.1
V
I
I
V = 7 V
I
mA
µA
I
IH
V = 2.7 V
I
20
UP
– 1.8
– 0.6
– 150
54
I
V
= 5.5 V,
V = 0.5 V
mA
IL
CC
I
Others
§
I
I
V
V
= 5.5 V,
= 5.5 V,
V = 0
O
– 60
mA
mA
OS
CC
CC
Outputs open
34
CC
‡
§
All typical values are at V
= 5 V, T = 25°C.
A
CC
Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
2–5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74F193A
SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTER
WITH DUAL CLOCK AND CLEAR
SDFS031A – D3693, JANUARY 1991 – REVISED OCTOBER 1993
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
V
T
= 5 V,
= 25°C
V
= 4.5 V to 5.5 V,
CC
A
CC
T = MIN to MAX
A
†
UNIT
MIN
0
MAX
MIN
0
MAX
85
f
t
Clock frequency
Pulse duration
85
MHz
clock
CLR high
4
4
LOAD low
5.5
4
5.5
4
ns
w
UP or DOWN high
UP or DOWN low
6
6
Data before LOAD inactive
CLR inactive before UP↑ or DOWN↑
LOAD inactive before UP↑ or DOWN↑
Data after LOAD inactive
3.5
5
3.5
5
t
t
Setup time
Hold time
ns
ns
su
7.5
2.5
7.5
2.5
h
switching characteristics (see Note 2)
V
C
R
= 5 V,
V
C
R
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
L
CC
L
L
= 50 pF,
= 500 Ω,
= 25°C
FROM
PARAMETER
TO
(OUTPUT)
= 500 Ω,
= MIN to MAX
UNIT
(INPUT)
†
T
A
T
A
MIN
85
2.5
3
TYP
MAX
MIN
85
2.5
3
MAX
f
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
100
MHz
ns
max
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PHL
PLH
PHL
PLH
PHL
PLH
PHL
8.5
8
9
9
UP or DOWN
UP or DOWN
A, B, C, or D
CO or BO
Any Q
2.5
5
8.5
12
2.5
5
9
ns
ns
ns
13
8
2
7
1.5
5
Any Q
6
13.5
10
15
11
4.5
5.5
5
4
Any Q
LOAD
12
5
13
12
13
12
15
13.8
14
13.5
Any Q
CO
11
5
ns
ns
ns
CLR
CLR
6
12
5.5
5
BO
5
11
6
13.5
12.6
13
6
LOAD
CO or BO
CO or BO
6
6
5.5
4.5
5
A, B, C, or D
ns
12.5
4.5
†
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and waveforms are shown in Section 1.
2–6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM
www.ti.com
30-Mar-2005
PACKAGING INFORMATION
Orderable Device
Status (1)
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
SOIC
SOIC
PDIP
Drawing
SN74F193AD
SN74F193ADR
SN74F193AN
OBSOLETE
OBSOLETE
OBSOLETE
D
D
N
16
16
16
TBD
TBD
TBD
Call TI
Call TI
Call TI
Call TI
Call TI
Call TI
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan
-
The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS
&
no Sb/Br)
-
please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 1
IMPORTANT NOTICE
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enhancements, improvements, and other changes to its products and services at any time and to discontinue
any product or service without notice. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms
and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for
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