SCBS075A − SEPTEMBER 1991 − REVISED NOVEMBER 1993
•
•
•
SN54BCT29825 . . . JT OR W PACKAGE
SN74BCT29825 . . . DW OR NT PACKAGE
(TOP VIEW)
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
3-State Buffer-Type Outputs Drive Bus
Lines Directly
Package Options Include Plastic
Small-Outline Packages (DW), Ceramic Chip
Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(JT, NT)
OE1
OE2
1D
2D
3D
4D
5D
6D
7D
8D
CLR
GND
description
These 8-bit bus-interface flip-flops feature 3-state
outputs designed specifically for driving highly
capacitive or relatively low-impedance loads.
They are particularly suitable for implementing
wider buffer registers, I/O ports, bidirectional bus
drivers with parity, and working registers.
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
VCC
OE3
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLKEN
CLK
1D
OE2
OE1
NC
VCC
SN54BCT29825 . . . FK PACKAGE
(TOP VIEW)
4
3 2
OE3
1Q
•
1 28 27 26
25
The eight flip-flops are edge-triggered D-type
flip-flops. With the clock-enable (CLKEN) input
low, the device enters data on the low-to-high
transition of the clock. Taking CLKEN high
disables the clock buffer, thus latching the outputs.
Taking the clear (CLR) input low causes the eight
Q outputs to go low independently of the clock.
2D
3D
4D
NC
5D
6D
7D
Buffered output-enable (OE1, OE2, or OE3)
inputs can be used to place the eight outputs in
either a normal logic state (high or low) or a
high-impedance state. In the high-impedance
state, the outputs neither load nor drive the bus
lines significantly. The high-impedance state and
increased drive provide the capability to drive bus
lines without need for interface or pullup
components.
NC − No internal connection
5
6
24
7
23
8
22
9
21
10
8D
CLR
GND
NC
CLK
CLKEN
8Q
20
11
19
12 13 14 15 16 17 18
2Q
3Q
4Q
NC
5Q
6Q
7Q
The output-enable inputs do not affect the internal
operation of the flip-flops. Old data can be retained
or new data can be entered while the outputs are
in the high-impedance state.
The SN54BCT29825 is characterized for operation over the full military temperature range of
−55°C to 125°C. The SN74BCT29825 is
characterized for operation from 0°C to 70°C.
Copyright 1993, Texas Instruments Incorporated
!"#$% ! & '("") % $& ! *(+, '$% ! -$%).
"!-('%& '! !"# %! &*)' '$% ! & *)" %/) %)"#& ! )0$& &%"(#) %&
&%$ -$"- 1$""$ %2. "!-('% ! *"!')&& 3 -!)& !% )')&&$" ,2 ',(-)
%)&% 3 ! $,, *$"$#)%)"&.
• DALLAS, TEXAS 75265
• HOUSTON, TEXAS 77251−1443
POST OFFICE BOX 655303
POST OFFICE BOX 1443
2−1
SCBS075A − SEPTEMBER 1991 − REVISED NOVEMBER 1993
FUNCTION TABLE
INPUTS
OE†
CLR
CLKEN
CLK
D
OUTPUT
Q
L
L
X
X
X
L
L
H
L
↑
H
H
L
H
L
↑
L
L
L
H
H
H or L
X
Q0
H
X
X
X
X
Z
† OE = H if any of the output-enable inputs is high.
OE = L if all of the output-enable inputs are low.
logic symbol‡
1
OE1
OE2
OE3
CLR
CLKEN
CLK
1D
2D
3D
4D
5D
6D
7D
8D
&
2
EN
23
11
14
13
3
R
G1
1C2
22
2D
4
21
5
20
6
19
7
18
8
17
9
16
10
15
‡ This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the DW, JT, NT, and W packages.
2−2
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
SCBS075A − SEPTEMBER 1991 − REVISED NOVEMBER 1993
logic diagram (positive logic)
1
OE1
OE2
OE3
CLR
CLKEN
CLK
1D
2
23
11
14
22
R
13
1Q
C1
3
1D
To Seven Other Channels
Pin numbers shown are for the DW, JT, NT, and W packages.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . . −0.5 V to 5.5 V
Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30 mA
Current into any output in the low state, IO: SN54BCT29825 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA
SN74BCT29825 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
Operating free-air temperature range: SN54BCT29825 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C
SN74BCT29825 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
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 negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
recommended operating conditions
SN54BCT29825
SN74BCT29825
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
UNIT
VCC
VIH
Supply voltage
VIL
IIK
Low-level input voltage
0.8
0.8
V
Input clamp current
−18
−18
mA
IOH
IOL
High-level output current
−15
−24
mA
48
mA
TA
Operating free-air temperature
70
°C
High-level input voltage
2
Low-level output current
2
24
−55
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
125
0
V
V
2−3
SCBS075A − SEPTEMBER 1991 − REVISED NOVEMBER 1993
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
SN54BCT29825
TYP†
MAX
TEST CONDITIONS
VCC = 4.5 V,
MIN
II = −18 mA
IOH = − 15 mA
VCC = 4.5 V
−1.2
2
3.2
IOH = − 24 mA
IOH = − 3 mA
VCC = 4.75 V,
SN74BCT29825
TYP†
MAX
MIN
−1.2
2.4
3.3
2
3.1
UNIT
V
V
2.7
VOL
VCC = 4.5 V
IOL = 24 mA
IOL = 48 mA
II
IIH
VCC = 5.5 V,
VCC = 5.5 V,
VI = 7 V
VI = 2.7 V
−10
−75
IIL
IOS‡
VCC = 5.5 V,
VCC = 5.5 V,
VI = 0.5 V
VO = 0
−75
−250
IOZH
IOZL
VCC = 5.5 V,
VCC = 5.5 V,
VO = 2.7 V
VO = 0.5 V
−20
µA
ICCL
ICCH
VCC = 5.5 V,
VCC = 5.5 V,
Outputs open
26
40
26
40
mA
Outputs open
10
16
10
16
mA
ICCZ
Ci
VCC = 5.5 V,
VCC = 5 V,
Outputs open
6
10
6
10
mA
VI = 2.5 V or 0.5 V
VO = 2.5 V or 0.5 V
5
0.38
0.55
0.42
0.1
0.55
V
0.1
mA
−10
−75
µA
−0.2
mA
−75
−250
mA
20
µA
−0.2
20
−20
Co
VCC = 5 V,
7
† All typical values are at VCC = 5 V, TA = 25°C.
‡ Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
5
pF
7
pF
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
VCC = 5 V,
TA = 25°C
fclock
Clock frequency
tw
Pulse duration
Setup time before CLK↑
MIN
MAX
MIN
MAX
0
125
0
125
0
125
4
4
4
4
4
Data high
6
6
6
3.5
3.5
3.5
1
1
1
CLR
Data low
CLKEN high or low
2−4
MAX
4
Data high
Hold time after CLK↑
MIN
CLK high or low
CLKEN high or low
th
SN74BCT29825
CLR low
Data low
tsu
SN54BCT29825
•
8
8
8
1.5
1.5
1.5
0
0
0
0.5
0.5
0.5
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
UNIT
MHz
ns
ns
ns
SCBS075A − SEPTEMBER 1991 − REVISED NOVEMBER 1993
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, CL = 50 pF (unless otherwise noted) (see Note 2)
PARAMETER
fmax
tPLH
tPHL
tPHL
FROM
(INPUT)
VCC = 5 V,
TA = 25°C
TO
(OUTPUT)
MIN
SN54BCT29825
TYP
MAX
2.2
5.4
7.8
2.2
9.9
2.2
9
3.1
5.9
7.7
3.1
9.1
3.1
8.4
125
CLK
Q
CLR
Q
tPZH
tPZL
OE
Q
tPHZ
tPLZ
OE
Q
MIN
MAX
SN74BCT29825
125
MIN
UNIT
MAX
125
MHz
3
6.4
8.3
3
9.6
3
9.5
2.1
6.2
8.4
2.1
10.8
2.1
10.3
5.1
9.1
11.4
5.1
13.6
5.1
13.2
2.4
5.9
7.8
2.4
9.8
2.4
9
1.8
5.2
7.2
1.8
9.2
1.8
8.2
ns
ns
ns
ns
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
2−5
SCBS075A − SEPTEMBER 1991 − REVISED NOVEMBER 1993
2−6
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
•
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 TI 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. Information of third parties may be subject to additional
restrictions.
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.
TI products are not authorized for use in safety-critical applications (such as life support) where a failure of the TI product would reasonably
be expected to cause severe personal injury or death, unless officers of the parties have executed an agreement specifically governing
such use. Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.
TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.
TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.
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
DLP® Products
www.dlp.com
Communications and
Telecom
www.ti.com/communications
DSP
dsp.ti.com
Computers and
Peripherals
www.ti.com/computers
Clocks and Timers
www.ti.com/clocks
Consumer Electronics
www.ti.com/consumer-apps
Interface
interface.ti.com
Energy
www.ti.com/energy
Logic
logic.ti.com
Industrial
www.ti.com/industrial
Power Mgmt
power.ti.com
Medical
www.ti.com/medical
Microcontrollers
microcontroller.ti.com
Security
www.ti.com/security
RFID
www.ti-rfid.com
Space, Avionics &
Defense
www.ti.com/space-avionics-defense
RF/IF and ZigBee® Solutions www.ti.com/lprf
Video and Imaging
www.ti.com/video
Wireless
www.ti.com/wireless-apps
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2010, Texas Instruments Incorporated
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Texas Instruments:
SN74BCT29825DWRE4 SN74BCT29825DW SN74BCT29825DWE4 SN74BCT29825DWR SN74BCT29825DWG4
SN74BCT29825DWRG4
工商网监
湘ICP备2023018690号
