74AC11593
8 BIT BINARY COUNTER
WITH 3 STATE I/O INPUT REGISTERS
SCAS202 − MARCH 1992 − REVISED APRIL 1993
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Parallel 3-State I/O: Register Inputs/
Counter Outputs
Counter Has Direct Overriding Load and
Clear
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin V
CC
and GND Configurations
Minimize High-Speed Switching Noise
EPICt
(Enhanced-Performance Implanted
CMOS) 1-mm Process
500-mA Typical Latch-Up Immunity
at 125°C
Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
DW OR NT PACKAGE
(TOP VIEW)
A/Q
A
B/Q
B
C/Q
C
D/Q
D
GND
GND
GND
GND
E/Q
E
F/Q
F
G/Q
G
H/Q
H
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
CCK
CCLR
CCKEN
CCKEN
CLOAD
V
CC
V
CC
OE
OE
RCK
RCK
RCO
description
The 74AC11953 consists of a parallel input, an 8-bit storage register feeding an 8-bit counter, and a 3-state I/O
which provides parallel count outputs. Both the register and the counter have individual positive-edge triggered
clocks.
The function tables show the operation of the counter clock-enable (CCKEN, CCKEN) and output-enable (OE,
OE) inputs. A register clock-enable (RCK) input is also provided.
The counter (RCO) input has direct load and clear functions. A low-going RCO pulse will be obtained when the
counter reaches the hex word FF. Expansion is easily accomplished for two stages by connecting RCO of the
first stage to CCKEN of the second stage. Cascading for larger count chains can be accomplished by
connecting RCO of each stage to CCK of the following stage.
The 74AC11593 is characterized for operation from − 40°C to 85°C.
Function Tables
COUNTER CLOCK ENABLE
INPUTS
CCKEN
L
L
H
H
CCKEN
L
H
L
H
OUTPUTS
A/QA THRU H/QH
Enable
Disable
Enable
Enable
OE
L
L
H
H
OUTPUT ENABLE
INPUTS
OE
L
H
L
H
OUTPUTS
A/QA THRU H/QH
Input mode
Input mode
Output mode
Input mode
EPIC is a trademark of 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.
Copyright
1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
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•
2−1
SCAS202 − MARCH 1992 − REVISED APRIL 1993
74AC11593
8 BIT BINARY COUNTER
WITH 3 STATE I/O INPUT REGISTERS
&
EN6
CT = 0
>1
G4
4+
C3
G1
1C2
2D
5, 6
CT = 255
13
logic symbol
†
OE
OE
CCLR
CCKEN
CCKEN
CCK
CLOAD
RCK
RCK
A/QA
B/QB
C/QC
D/QD
E/QE
F/QF
G/QQ
H/QH
17
16
23
22
21
24
20
14
15
1
CTR8
RCO
3D
Z5
2
3
4
9
10
11
12
† 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
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
•
•
74AC11593
8 BIT BINARY COUNTER
WITH 3 STATE I/O INPUT REGISTERS
SCAS202 − MARCH 1992 − REVISED APRIL 1993
logic diagram (positive logic)
OE
OE
CCLR
CCKEN
CCKEN
CCK
CLOAD
RCK
RCK
A/QA
17
16
23
22
21
24
20
14
15
1
1
G2
2
1D
C1
S
T
R
13
RCO
B/QB
2
1D
C1
S
T
R
C/QC
3
1D
C1
S
T
R
D/QD
4
1D
C1
S
T
R
E/QE
9
1D
C1
S
T
R
F/QF
10
1D
C1
S
T
R
G/QG
11
1D
C1
S
T
R
H/QH
12
1D
C1
S
T
R
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
•
•
2−3
SCAS202 − MARCH 1992 − REVISED APRIL 1993
74AC11593
8 BIT BINARY COUNTER
WITH 3 STATE I/O INPUT REGISTERS
typical operating sequence
OE
OE
CCLR
CLOAD
CCK
CCKEN
CCKEN
RCK
RCK
Output
Hex
FE
Output Hex
A/QA thru H/QH
00
Input Hex FC
Output Hex
FC
Output Hex
FD
Output Hex
FF
Output Hex
00
RCO
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range, V
I
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V
CC
+ 0.5 V
Output voltage range, V
O
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V
CC
+ 0.5 V
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
20 mA
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
50 mA
Continuous output current, I
O
(V
O
= 0 to V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
50 mA
Continuous current through V
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
225 mA
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°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 and output voltage ratings may be exceeded if the input and output current ratings are observed.
2−4
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
•
•
74AC11593
8 BIT BINARY COUNTER
WITH 3 STATE I/O INPUT REGISTERS
SCAS202 − MARCH 1992 − REVISED APRIL 1993
recommended operating conditions (see Note 2)
MIN
VCC
VIH
Supply voltage
VCC = 3 V
VCC = 4.5 V
VCC = 5.5 V
VCC = 3 V
VIL
VI
VO
IOH
Low-level input voltage
Input voltage
Output voltage
VCC = 3 V
VCC = 4.5 V
VCC = 5.5 V
VCC = 3 V
IOL
Dt
/Dv
TA
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
VCC = 4.5 V
VCC = 5.5 V
0
− 40
VCC = 4.5 V
VCC = 5.5 V
0
0
3
2.1
3.15
3.85
0.9
1.35
1.65
VCC
VCC
−4
− 24
−24
12
24
24
10
85
ns / V
°C
mA
mA
V
V
V
V
NOM
5
MAX
5.5
UNIT
V
High-level input voltage
High-level output current
NOTE 2: Unused or floating inputs must be held high or low.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
3V
IOH = − 50
mA
VOH
IOH = − 4 mA
IOH = − 24 mA
IOH = − 75 mA
{
IOL = 50
mA
VOL
IOL = 12 mA
IOL = 24 mA
IOL = 75 mA
{
II
IOZ
ICC
Ci
VI = VCC or GND
VO = VCC or GND
VI = VCC or GND,
VI = VCC or GND
IO = 0
4.5 V
5.5 V
3V
4.5 V
5.5 V
5.5 V
3V
4.5 V
5.5 V
3V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5V
4.5
±
0.1
±
0.5
8
0.1
0.1
0.1
0.36
0.36
0.36
TA = 25°C
MIN
TYP
MAX
2.9
4.4
5.4
2.58
3.94
4.94
MIN
2.9
4.4
5.4
2.48
3.8
4.8
3.85
0.1
0.1
0.1
0.44
0.44
0.44
1.65
±
1
±
5
80
mA
mA
mA
pF
V
V
MAX
UNIT
† Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
•
•
2−5
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