SN74F190AN [TI]
Synchronous up/down decade counters 16-PDIP 0 to 70;
| 型号： | SN74F190AN |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Synchronous up/down decade counters 16-PDIP 0 to 70 光电二极管 输出元件 逻辑集成电路 触发器 |
| 文件： | 总8页 (文件大小：128K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN74F190A
SYNCHRONOUS 4-BIT UP/DOWN DECADE COUNTER
WITH RESET AND RIPPLE CLOCK
SDFS026B – D3690, JULY 1990 – REVISED OCTOBER 1993
D OR N PACKAGE
(TOP VIEW)
• High-Speed f
• Single Down/Up Count Control Line
of 125 MHz Typical
max
• Look-Ahead Circuitry Enhances Speed of
B
V
A
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CC
Cascaded Counters
Q
Q
B
A
• Fully Synchronous in Count Modes
CLK
RCO
MAX/MIN
LOAD
C
• Asynchronously Presettable With Load
CTEN
D/U
Control
Q
C
• Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
Q
D
GND
D
description
The SN74F190A is a synchronous, 4-bit decade reversible 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 the clock (CLK) input if the
enable (CTEN) input is low. A high at CTEN inhibits counting. The direction of the count is determined by the
level of the down/up (D/U) input. When D/U is low, the counter counts up, and when D/U is high, it counts down.
Thiscounterfeaturesafullyindependentclockcircuit. Changesatthecontrol(CTENandD/U)inputsthatmodify
the operating mode have no effect on the contents of the counter until clocking occurs. The function of the
counter is dictated solely by the condition meeting the stable setup and hold times. This counter is fully
programmable; that is, it may be preset to any number between 0 and 9 by placing a low on the load input and
entering the desired data at the data inputs. The output changes to agree with the data inputs independent of
the level of the clock input. This feature allows the counter to be used as a modulo-N divider by simply modifying
the count length with the preset inputs.
Two outputs have been made available to perform the cascading function: ripple clock and maximum/minimum
count. The latter output produces a high-level output pulse with a duration approximately equal to one complete
cycle of the clock while the count is minimum (0) counting down or maximum (9) counting up. The ripple-clock
(RCO) output produces a low-level output pulse under those same conditions, but only while the clock input is
low. The counter can easily be cascaded by feeding the ripple-clock output to the enable input of the succeeding
counter if parallel clocking is used or to the clock input if parallel enabling is used. The maximum/minimum count
(MAX/MIN) output can be used to accomplish look-ahead for high speed operation.
The SN74F190A 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
SN74F190A
SYNCHRONOUS 4-BIT UP/DOWN DECADE COUNTER
WITH RESET AND RIPPLE CLOCK
SDFS026B – D3690, JULY 1990 – REVISED OCTOBER 1993
†
logic symbol
4
CTRDIV10
CTEN
D/U
G1
12
13
5
2(CT=0)Z6
3(CT=9)Z6
MAX/MIN
RCO
M2 [DOWN]
M3 [UP]
14
CLK
1,2– / 1,3+
G4
6,1,4
11
LOAD
C5
15
1
3
2
[1]
Q
A
A
B
C
D
5D
[2]
[3]
[4]
Q
B
10
9
6
7
Q
Q
C
D
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74F190A
SYNCHRONOUS 4-BIT UP/DOWN DECADE COUNTER
WITH RESET AND RIPPLE CLOCK
SDFS026B – D3690, JULY 1990 – REVISED OCTOBER 1993
logic diagram(positive logic)
12
MAX/
MIN
4
CTEN
13
RCO
5
D/U
14
CLK
11
LOAD
15
A
3
S
Q
A
C1
1D
R
1
B
2
S
Q
B
C1
1D
R
10
C
6
S
Q
C
C1
1D
R
9
D
7
S
Q
D
C1
1D
R
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74F190A
SYNCHRONOUS 4-BIT UP/DOWN DECADE COUNTER
WITH RESET AND RIPPLE CLOCK
SDFS026B – D3690, JULY 1990 – REVISED OCTOBER 1993
typical load, count, and inhibit sequences
Illustrated below is the following sequence:
1. Load (preset) to BCD seven
2. Count up to eight, nine (maximum), zero, one, and two
3. Inhibit
4. Count down to one, zero (minimum), nine, eight, and seven
LOAD
A
B
Data
Inputs
C
D
CLK
D/U
CTEN
Q
A
B
C
D
Q
Q
Q
MAX/MIN
RCO
7
8
9
0
1
2
2
2
1
0
9
8
7
Count Up
Inhibit
Count Down
Load
2–4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN74F190A
SYNCHRONOUS 4-BIT UP/DOWN DECADE COUNTER
WITH RESET AND RIPPLE CLOCK
SDFS026B – D3690, JULY 1990 – 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
IK
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
I
I
I
I
= – 1 mA
= – 1 mA
= 20 mA
2.5
2.7
3.4
0.3
OH
OH
OL
V
V
V
OH
0.5
0.1
V
OL
I
I
V = 7 V
I
mA
µA
I
IH
V = 2.7 V
I
20
CTEN
– 1.8
– 0.6
– 150
55
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
40
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
SN74F190A
SYNCHRONOUS 4-BIT UP/DOWN DECADE COUNTER
WITH RESET AND RIPPLE CLOCK
SDFS026B – D3690, JULY 1990 – REVISED OCTOBER 1993
timing requirements
V
T
= 5 V,
= 25°C
V
T
= 4.5 V to 5.5 V,
CC
A
CC
= MIN to MAX
†
UNIT
MHz
ns
A
MIN
0
MAX
MIN
0
MAX
90
f
t
Clock frequency
Pulse duration
90
clock
LOAD low
6
6
CLK high
4
4
w
CLK low
7
7
Data before LOAD↑
CTEN before CLK↑
D/U before CLK↑
LOAD inactive before CLK↑
Data after LOAD↑
CTEN after CLK↑
D/U after CLK↑
4
4
6.5
15
10
2
6.5
15
10
2
t
t
Setup time
Hold time
ns
ns
su
1
1
h
0
0
switching characteristics (see Note )
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)
= 500Ω,
= MIN to MAX
UNIT
(INPUT)
†
T
A
T
A
MIN
90
2.5
5
TYP
MAX
MIN
90
2
MAX
f
MHz
ns
max
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
4.8
7
8
11.5
12.5
11
8.5
12
CLK
CLK
Any Q
MAX/MIN
RCO
5
6.5
6
9.4
8.9
5.2
4.8
5.7
5
6
13
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
6
12
2.5
3
7.5
7.5
7
2
8
CLK
2.5
2
8
2
7.8
8
CTEN
RCO
3
7.5
16
3
8
13
8
17.8
11
D/U
RCO
4.5
4
8.1
7.9
7.5
4.7
8.9
10.5
10
10.5
9.8
9.5
7
4
3
11.3
10
D/U
MAX/MIN
Any Q
3
3
2
1.5
6.5
5
7.5
13
A, B, C, or D
A, B, C, or D
A, B, C, or D
LOAD
6.5
5.5
6.5
6
12
13.6
13
15.4
14
MAX/MIN
RCO
6
15
18.6
13.5
9.8
12.1
15.2
14
6
21.1
15
6
9.5
7.7
9.9
12.3
11.7
16.8
11.6
6
4.5
5.5
5.5
6
4
11.4
13.1
17
Any Q
5
5.5
6
LOAD
MAX/MIN
RCO
15.6
23.2
15.2
8.5
7.5
19.9
14
8.5
7
LOAD
†
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
24-Jun-2005
PACKAGING INFORMATION
Orderable Device
Status (1)
Package Package
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
Qty
Type
Drawing
SN74F190AN
OBSOLETE
PDIP
N
16
TBD
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.
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Addendum-Page 1
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