TI CD74HCT597E

[ /Title
(CD74
HC597
,
CD74
HCT59
7)
/Subject
(High
Speed
CMOS
CD54HC597, CD74HC597,
CD74HCT597
Data sheet acquired from Harris Semiconductor
SCHS191C
High-Speed CMOS Logic
8-Bit Shift Register with Input Storage
January 1998 - Revised October 2003
Features
Description
• Buffered Inputs
The ’HC597 and CD74HCT597 are high-speed silicon gate
CMOS devices that are pin-compatible with the LSTTL 597
devices. Each device consists of an 8-flip-flop input register
and an 8-bit parallel-in/serial-in, serial-out shift register. Each
register is controlled by its own clock. A “low” on the parallel
load input (PL) shifts parallel stored data asynchronously into
the shift register. A “low” master input (MR) clears the shift
register. Serial input data can also be synchronously shifted
through the shift register when PL is high.
• Asynchronous Parallel Load
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
Ordering Information
• Significant Power Reduction Compared to LSTTL
Logic ICs
TEMP. RANGE (oC)
PACKAGE
CD54HC597F3A
-55 to 125
16 Ld CERDIP
CD74HC597E
-55 to 125
16 Ld PDIP
CD74HC597M
-55 to 125
16 Ld SOIC
CD74HC597MT
-55 to 125
16 Ld SOIC
CD74HC597M96
-55 to 125
16 Ld SOIC
CD74HC597NSR
-55 to 125
16 Ld SOP
CD74HCT597E
-55 to 125
16 Ld PDIP
CD74HCT597M
-55 to 125
16 Ld SOIC
CD74HCT597MT
-55 to 125
16 Ld SOIC
CD74HCT597M96
-55 to 125
16 Ld SOIC
PART NUMBER
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
NOTE: When ordering, use the entire part number. The suffixes 96
and R denote tape and reel. The suffix T denotes a small-quantity
reel of 250.
Pinout
CD54HC597
(CERDIP)
CD74HC597
(PDIP, SOIC, SOP)
CD74HCT597
(PDIP, SOIC)
TOP VIEW
D1 1
16 VCC
D2 2
15 D0
D3 3
14 DS
D4 4
13 PL
D5 5
12 STCP
D6 6
11 SHCP
D7 7
10 MR
GND 8
9 Q7
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© 2003, Texas Instruments Incorporated
1
CD54HC597, CD74HC597, CD74HCT597
Functional Diagram
DS
D0
14
15
1
D1
2
D2
PARALLEL
DATA
INPUTS
3
D3
8 F/F
STORAGE
REG.
5
4
D4
D5
6
D6
7
D7
STCP
8-BIT
SHIFT
REG.
9
Q7
12
11
SHCP
PL
13
10
MR
FUNCTION TABLE
STCP
SHCP
PL
MR
FUNCTION
↑
X
X
X
Data Loaded to Input Flip-Flops
↑
X
L
H
Data Loaded from Inputs to Shift Register
No Clock Edge
X
L
H
Data Transferred from Input Flip-Flops to Shift Register
X
X
L
L
Invalid Logic, State of Shift Register Indeterminate when
Signals Removed
X
X
H
L
Shift Register Cleared
X
↑
H
H
Shift Register Clocked Qn = Qn-1, Q0 = DS
H = High Voltage Level, L = Low Voltage Level, X = Don’t Care, ↑ = Transition from Low to High CP Level
2
CD54HC597, CD74HC597, CD74HCT597
Absolute Maximum Ratings
Thermal Information
DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V
DC Input Diode Current, IIK
For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA
DC Output Diode Current, IOK
For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±20mA
DC Drain Current, per Output, IO
For -0.5V < VO < VCC + 0.5V. . . . . . . . . . . . . . . . . . . . . . . . . .±25mA
DC Output Source or Sink Current per Output Pin, IO
For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±25mA
DC VCC or Ground Current, ICC . . . . . . . . . . . . . . . . . . . . . . . . .±50mA
Thermal Resistance (Typical, Note 1)
θJA (oC/W)
E (PDIP) Package . . . . . . . . . . . . . . . . . . . . . . . . . .
67
M (SOIC) Package. . . . . . . . . . . . . . . . . . . . . . . . . .
73
NS (SOP) Package . . . . . . . . . . . . . . . . . . . . . . . . .
64
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150oC
Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC
(SOIC - Lead Tips Only)
Operating Conditions
Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC
Supply Voltage Range, VCC
HC Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2V to 6V
DC Input or Output Voltage, VI, VO . . . . . . . . . . . . . . . . . 0V to VCC
Input Rise and Fall Time
2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000ns (Max)
4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500ns (Max)
6V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400ns (Max)
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. The package thermal impedance is calculated in accordance with JESD 51-7.
DC Electrical Specifications
TEST
CONDITIONS
PARAMETER
25oC
-40oC TO 85oC -55oC TO 125oC
SYMBOL
VI (V)
IO (mA)
VCC
(V)
VIH
-
-
2
1.5
-
-
1.5
4.5
3.15
-
-
3.15
-
3.15
-
V
6
4.2
-
-
4.2
-
4.2
-
V
2
-
-
0.5
-
0.5
-
0.5
V
4.5
-
-
1.35
-
1.35
-
1.35
V
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNITS
-
1.5
-
V
HC TYPES
High Level Input
Voltage
Low Level Input
Voltage
VIL
High Level Output
Voltage
CMOS Loads
VOH
-
VIH or VIL
High Level Output
Voltage
TTL Loads
Low Level Output
Voltage
CMOS Loads
VOL
VIH or VIL
Low Level Output
Voltage
TTL Loads
Input Leakage
Current
II
VCC or
GND
-
6
-
-
1.8
-
1.8
-
1.8
V
-0.02
2
1.9
-
-
1.9
-
1.9
-
V
-0.02
4.5
4.4
-
-
4.4
-
4.4
-
V
-0.02
6
5.9
-
-
5.9
-
5.9
-
V
-
-
-
-
-
-
-
-
-
V
-4
4.5
3.98
-
-
3.84
-
3.7
-
V
-5.2
6
5.48
-
-
5.34
-
5.2
-
V
0.02
2
-
-
0.1
-
0.1
-
0.1
V
0.02
4.5
-
-
0.1
-
0.1
-
0.1
V
0.02
6
-
-
0.1
-
0.1
-
0.1
V
-
-
-
-
-
-
-
-
-
V
4
4.5
-
-
0.26
-
0.33
-
0.4
V
5.2
6
-
-
0.26
-
0.33
-
0.4
V
-
6
-
-
±0.1
-
±1
-
±1
µA
3
CD54HC597, CD74HC597, CD74HCT597
DC Electrical Specifications
(Continued)
TEST
CONDITIONS
25oC
-40oC TO 85oC -55oC TO 125oC
SYMBOL
VI (V)
IO (mA)
VCC
(V)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNITS
ICC
VCC or
GND
0
6
-
-
8
-
80
-
160
µA
High Level Input
Voltage
VIH
-
-
4.5 to
5.5
2
-
-
2
-
2
-
V
Low Level Input
Voltage
VIL
-
-
4.5 to
5.5
-
-
0.8
-
0.8
-
0.8
V
High Level Output
Voltage
CMOS Loads
VOH
VIH or VIL
-0.02
4.5
4.4
-
-
4.4
-
4.4
-
V
-4
4.5
3.98
-
-
3.84
-
3.7
-
V
0.02
4.5
-
-
0.1
-
0.1
-
0.1
V
4
4.5
-
-
0.26
-
0.33
-
0.4
V
±0.1
-
±1
-
±1
µA
PARAMETER
Quiescent Device
Current
HCT TYPES
High Level Output
Voltage
TTL Loads
Low Level Output
Voltage
CMOS Loads
VOL
VIH or VIL
Low Level Output
Voltage
TTL Loads
Input Leakage
Current
Quiescent Device
Current
Additional Quiescent
Device Current Per
Input Pin: 1 Unit Load
II
VCC and
GND
0
5.5
-
ICC
VCC or
GND
0
5.5
-
-
8
-
80
-
160
µA
∆ICC
(Note 2)
VCC
-2.1
-
4.5 to
5.5
-
100
360
-
450
-
490
µA
NOTE:
2. For dual-supply systems theoretical worst case (VI = 2.4V, VCC = 5.5V) specification is 1.8mA.
HCT Input Loading Table
INPUT
UNIT LOADS
DS
0.2
Dn
0.3
PL, MR
1.5
STCP, SHCP
1.5
NOTE: Unit Load is ∆ICC limit specified in DC Electrical Specifications
Table, e.g., 360µA max. at 25oC.
Prerequisite for Switching Specifications
25oC
PARAMETER
-40oC TO 85oC
-55oC TO 125oC
SYMBOL
VCC (V)
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
fMAX
2
6
-
-
5
-
-
4
-
-
MHz
4.5
30
-
-
25
-
-
20
-
-
MHz
6
35
-
-
29
-
-
23
-
-
MHz
HC TYPES
SHCP Frequency
4
CD54HC597, CD74HC597, CD74HCT597
Prerequisite for Switching Specifications
(Continued)
25oC
-40oC TO 85oC
-55oC TO 125oC
SYMBOL
VCC (V)
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
tW
2
80
-
-
100
-
-
120
-
-
ns
4.5
16
-
-
20
-
-
24
-
-
ns
6
14
-
-
17
-
-
20
-
-
ns
2
60
-
-
75
-
-
90
-
-
ns
4.5
12
-
-
15
-
-
18
-
-
ns
6
10
-
-
13
-
-
15
-
-
ns
2
80
-
-
100
-
-
120
-
-
ns
4.5
16
-
-
20
-
-
24
-
-
ns
6
14
-
-
17
-
-
20
-
-
ns
2
70
-
-
90
-
-
105
-
-
ns
4.5
14
-
-
18
-
-
21
-
-
ns
6
12
-
-
15
-
-
18
-
-
ns
2
100
-
-
125
-
-
150
-
-
ns
4.5
20
-
-
25
-
-
30
-
-
ns
6
17
-
-
21
-
-
26
-
-
ns
2
50
-
-
65
-
-
75
-
-
ns
4.5
10
-
-
13
-
-
15
-
-
ns
6
9
-
-
11
-
-
13
-
-
ns
2
0
-
-
0
-
-
0
-
-
ns
4.5
0
-
-
0
-
-
0
-
-
ns
6
0
-
-
0
-
-
0
-
-
ns
2
3
-
-
3
-
-
3
-
-
ns
4.5
3
-
-
3
-
-
3
-
-
ns
6
3
-
-
3
-
-
3
-
-
ns
2
3
-
-
3
-
-
3
-
-
ns
4.5
3
-
-
3
-
-
3
-
-
ns
6
3
-
-
3
-
-
3
-
-
ns
fMAX
4.5
25
-
-
20
-
-
16
-
-
MHz
SHCP Pulse Width
tW
4.5
20
-
-
25
-
-
30
-
-
ns
STCP Pulse Width
tW
4.5
13
-
-
16
-
-
20
-
-
ns
MR Pulse Width
tW
4.5
18
-
-
23
-
-
27
-
-
ns
PL Pulse Width
tW
4.5
16
-
-
20
-
-
24
-
-
ns
STCP to SHCP Setup
Time
tSU
4.5
24
-
-
30
-
-
36
-
-
ns
PARAMETER
SHCP Pulse Width
STCP Pulse Width
MR Pulse Width
PL Pulse Width
STCP to SHCP Setup
Time
DS to SHCP Setup Time
Dn to STCP Setup Time
STCP to SHCP Setup
Time
DS to SHCP Hold Time
Dn to STCP Hold Time
MR to SHCP Removal
Time
tW
tW
tW
tSU
tSU
tH
tH
tREM
HCT TYPES
SHCP Frequency
5
CD54HC597, CD74HC597, CD74HCT597
Prerequisite for Switching Specifications
(Continued)
25oC
-40oC TO 85oC
-55oC TO 125oC
PARAMETER
SYMBOL
VCC (V)
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
DS to SHCP Setup Time
Dn to STCP Setup Time
tH
4.5
10
-
-
13
-
-
15
-
-
ns
STCP to SHCP Hold Time
tH
4.5
0
-
-
0
-
-
0
-
-
ns
DS to SHCP Hold Time
Dn to STCP Hold Time
tH
4.5
3
-
-
3
-
-
3
-
-
ns
MR to SHCP Removal
Time
tREM
4.5
10
-
-
13
-
-
15
-
-
ns
Switching Specifications Input tr, tf = 6ns
PARAMETER
HC TYPES
Propagation Delay
STCP to Q7
MR to Q7
Output Transition Time
Input Capacitance
Power Dissipation
Capacitance, (Notes 3, 4)
-40oC to 85oC -55oC to 125oC
SYMBOL
VCC (V)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNITS
tPLH, tPHL
CL = 50pF
2
-
-
175
-
220
-
265
ns
SHCP to Q7
PL to Q7
25oC
TEST
CONDITIONS
tPLH, tPHL
tPLH, tPHL
tPLH, tPHL
tTLH, tTHL
4.5
-
-
35
-
44
-
53
ns
CL =15pF
5
-
14
-
-
-
-
-
ns
CL = 50pF
6
-
-
30
-
37
-
45
ns
CL = 50pF
2
-
-
200
-
250
-
300
ns
4.5
-
-
40
-
50
-
60
ns
CL =15pF
5
-
17
-
-
-
-
-
ns
CL = 50pF
6
-
-
34
-
43
-
51
ns
CL = 50pF
2
-
-
240
-
300
-
360
ns
4.5
-
-
48
-
60
-
72
ns
CL =15pF
5
-
20
-
-
-
-
-
ns
CL = 50pF
6
-
-
41
-
51
-
61
ns
CL = 50pF
2
-
-
175
-
220
-
265
ns
4.5
-
-
35
-
44
-
53
ns
CL =15pF
5
-
14
-
-
-
-
-
ns
CL = 50pF
6
-
-
30
-
37
-
45
ns
CL = 50pF
2
-
-
75
-
95
-
110
ns
4.5
-
-
15
-
19
-
22
ns
6
-
-
13
-
16
-
19
ns
CI
CL = 50pF
-
-
-
10
-
10
-
10
pF
CPD
-
5
-
13.5
-
-
-
-
-
pF
HCT
Propagation Delay
tPLH, tPHL
SHCP to Q7
PL to Q7
STCP to Q7
tPLH, tPHL
tPLH, tPHL
CL = 50pF
4.5
-
-
38
-
48
-
57
ns
CL = 15pF
5
-
16
-
-
-
-
-
ns
CL = 50pF
4.5
-
-
48
72
ns
CL = 15pF
5
-
20
-
-
ns
CL = 50pF
4.5
-
-
56
CL = 15pF
5
-
23
-
6
60
-
-
-
70
-
-
-
84
ns
-
ns
CD54HC597, CD74HC597, CD74HCT597
Switching Specifications Input tr, tf = 6ns
PARAMETER
MR to Q7
Output Transition Time
Input Capacitance
Power Dissipation
Capacitance, (Notes 3, 4)
(Continued)
25oC
-40oC to 85oC -55oC to 125oC
SYMBOL
TEST
CONDITIONS
VCC (V)
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNITS
tPLH, tPHL
CL = 50pF
4.5
-
-
44
-
55
-
66
ns
CL = 15pF
5
-
18
-
-
-
-
-
ns
tTLH, tTHL
CL = 50pF
4.5
-
-
15
-
19
-
22
ns
CI
CL = 50pF
-
-
-
10
-
10
-
10
pF
CPD
-
5
-
18.5
-
-
-
-
-
pF
NOTES:
3. CPD is used to determine the dynamic power consumption, per package.
4. PD = CPD VCC2 fi + Σ (CL VCC2 fo) where: fi = Input Frequency, fo = Output Frequency, CL = Output Load Capacitance, VCC = Supply
Voltage.
Test Circuits and Waveforms
tfCL
trCL
CLOCK
tWL + tWH =
90%
10%
I
fCL
CLOCK
50%
50%
tfCL = 6ns
2.7V
1.3V
0.3V
0.3V
GND
1.3V
1.3V
GND
tWH
tWL
tWH
tWL
I
fCL
3V
VCC
50%
10%
tWL + tWH =
trCL = 6ns
NOTE: Outputs should be switching from 10% VCC to 90% VCC in
accordance with device truth table. For fMAX, input duty cycle = 50%.
NOTE: Outputs should be switching from 10% VCC to 90% VCC in
accordance with device truth table. For fMAX, input duty cycle = 50%.
FIGURE 1. HC CLOCK PULSE RISE AND FALL TIMES AND
PULSE WIDTH
FIGURE 2. HCT CLOCK PULSE RISE AND FALL TIMES AND
PULSE WIDTH
tr = 6ns
tf = 6ns
90%
50%
10%
INPUT
GND
tTLH
GND
tTHL
90%
50%
10%
INVERTING
OUTPUT
3V
2.7V
1.3V
0.3V
INPUT
tTHL
tPHL
tf = 6ns
tr = 6ns
VCC
tTLH
90%
1.3V
10%
INVERTING
OUTPUT
tPHL
tPLH
FIGURE 3. HC TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
tPLH
FIGURE 4. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
7
CD54HC597, CD74HC597, CD74HCT597
Test Circuits and Waveforms
trCL
tfCL
trCL
CLOCK
INPUT
(Continued)
VCC
90%
GND
tH(H)
GND
tH(H)
VCC
DATA
INPUT
50%
tH(L)
3V
1.3V
1.3V
1.3V
GND
tSU(H)
tSU(H)
tSU(L)
tTLH
90%
OUTPUT
tTHL
90%
50%
10%
tTLH
90%
1.3V
OUTPUT
tREM
3V
SET, RESET
OR PRESET
GND
tTHL
1.3V
10%
FIGURE 5. HC SETUP TIMES, HOLD TIMES, REMOVAL TIME,
AND PROPAGATION DELAY TIMES FOR EDGE
TRIGGERED SEQUENTIAL LOGIC CIRCUITS
tPHL
1.3V
GND
IC
CL
50pF
GND
90%
tPLH
50%
IC
tSU(L)
tPHL
tPLH
tREM
VCC
SET, RESET
OR PRESET
1.3V
0.3V
tH(L)
DATA
INPUT
3V
2.7V
CLOCK
INPUT
50%
10%
tfCL
CL
50pF
FIGURE 6. HCT SETUP TIMES, HOLD TIMES, REMOVAL TIME,
AND PROPAGATION DELAY TIMES FOR EDGE
TRIGGERED SEQUENTIAL LOGIC CIRCUITS
8
CD54HC597, CD74HC597, CD74HCT597
Timing Diagram
SHIFT CLOCK
SHCP
SERIAL DATE
DS
MASTER RESET
MR
PARALLEL LOAD
PL
STORAGE CLOCK
STCP
PARALLEL
DATA
INPUTS
D0
H
L
L
D1
L
L
L
D2
H
L
L
D3
L
L
L
D4
H
L
H
D5
H
L
H
D6
L
L
L
D7
H
H
H
Q7
L
L
H
L
H
H
L
H
L
H
L
H
L
L
L
H
L
H
H
RESET
SHIFT
REGISTER
SERIAL
SHIFT
SERIAL
SHIFT
LOAD
FLIP-FLOPS
PARALLEL LOAD
SHIFT REGISTER
LOAD
FLIP-FLOPS
9
SERIAL
SHIFT
PARALLEL LOAD
SHIFT REGISTER
SERIAL
SHIFT
PARALLEL LOAD FLIP-FLOPS
AND SHIFT REGISTER
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,
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
their products and applications using TI components. To minimize the risks associated with customer products
and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process
in which TI products or services are used. Information published by TI regarding third-party products or services
does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.
Use of such information may require a license from a third party under the patents or other intellectual property
of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without
alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction
of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for
such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that
product or service voids all express and any implied warranties for the associated TI product or service and
is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Following are URLs where you can obtain information on other Texas Instruments products and application
solutions:
Products
Applications
Amplifiers
amplifier.ti.com
Audio
www.ti.com/audio
Data Converters
dataconverter.ti.com
Automotive
www.ti.com/automotive
DSP
dsp.ti.com
Broadband
www.ti.com/broadband
Interface
interface.ti.com
Digital Control
www.ti.com/digitalcontrol
Logic
logic.ti.com
Military
www.ti.com/military
Power Mgmt
power.ti.com
Optical Networking
www.ti.com/opticalnetwork
Microcontrollers
microcontroller.ti.com
Security
www.ti.com/security
Telephony
www.ti.com/telephony
Video & Imaging
www.ti.com/video
Wireless
www.ti.com/wireless
Mailing Address:
Texas Instruments
Post Office Box 655303 Dallas, Texas 75265
Copyright  2004, Texas Instruments Incorporated