SN54BCT646DW [TI]

BCT/FBT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, PLASTIC, SO-24;
SN54BCT646DW
型号: SN54BCT646DW
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

BCT/FBT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24, PLASTIC, SO-24

信息通信管理 光电二极管 输出元件 逻辑集成电路
文件: 总16页 (文件大小:361K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
SN54BCT646, SN74BCT646  
OCTAL BUS TRANSCEIVERS AND REGISTERS  
WITH 3-STATE OUTPUTS  
SCBS037D − AUGUST 1989 − REVISED MAY 2004  
D
State-of-the-Art BiCMOS Design  
Significantly Reduces I  
D
D
Multiplexed Real-Time and Stored Data  
CCZ  
ESD Protection Exceeds JESD 22  
− 2000-V Human-Body Model (A114-A)  
− 200-V Machine Model (A115-A)  
D
Bus Transceivers/Registers  
D
Independent Registers and Enables for  
A and B Buses  
SN54BCT646 . . . JT OR W PACKAGE  
SN74BCT646 . . . DW OR NT PACKAGE  
(TOP VIEW)  
SN54BCT646 . . . FK PACKAGE  
(TOP VIEW)  
CLKAB  
SAB  
DIR  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
A8  
GND  
VCC  
CLKBA  
SBA  
OE  
B1  
B2  
B3  
B4  
B5  
1
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
2
3
4
3
2
1 28 27 26  
25  
A1  
A2  
A3  
NC  
A4  
A5  
A6  
OE  
B1  
B2  
NC  
B3  
B4  
B5  
5
4
24  
23  
22  
21  
20  
19  
6
5
7
6
8
7
9
8
10  
11  
9
B6  
B7  
B8  
10  
11  
12  
12 13 14 15 16 17 18  
NC − No internal connection  
description/ordering information  
These devices consist of bus transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed  
transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked  
into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1  
illustrates the four fundamental bus-management functions that can be performed with the ’BCT646 devices.  
Output-enable (OE) and direction-control (DIR) inputs are provided to control the transceiver functions. In the  
transceiver mode, data present at the high-impedance port can be stored in either register or in both.  
The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. The  
direction control (DIR) determines which bus will receive data when OE is low. In the isolation mode (OE high),  
A data can be stored in one register and/or B data can be stored in the other register.  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
T
A
PACKAGE  
PDIP − NT  
SOIC − DW  
Tube  
SN74BCT646NT  
SN74BCT646DW  
SN74BCT646DWR  
SNJ54BCT646JT  
SNJ54BCT646W  
SNJ54BCT646FK  
SN74BCT646NT  
Tube  
0°C to 70°C  
BCT646  
Tape and reel  
Tube  
CDIP − JT  
CFP − W  
SNJ54BCT646JT  
SNJ54BCT646W  
SNJ54BCT646FK  
−55°C to 125°C  
Tube  
LCCC − FK  
Tube  
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are  
available at www.ti.com/sc/package.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright © 2004, Texas Instruments Incorporated  
On products compliant to MIL-PRF-38535, all parameters are tested  
unless otherwise noted. On all other products, production  
processing does not necessarily include testing of all parameters.  
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.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443  
SN54BCT646, SN74BCT646  
OCTAL BUS TRANSCEIVERS AND REGISTERS  
WITH 3-STATE OUTPUTS  
SCBS037D − AUGUST 1989 − REVISED MAY 2004  
description/ordering information(continued)  
When an output function is disabled, the input function still is enabled and can be used to store and transmit  
data. Only one of the two buses, A or B, can be driven at a time.  
To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup  
CC  
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.  
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443  
SN54BCT646, SN74BCT646  
OCTAL BUS TRANSCEIVERS AND REGISTERS  
WITH 3-STATE OUTPUTS  
SCBS037D − AUGUST 1989 − REVISED MAY 2004  
21  
OE  
L
3
1
23  
2
22  
SBA  
L
21  
OE  
L
3
DIR  
H
1
23  
2
22  
SBA  
X
DIR CLKAB CLKBA SAB  
L
CLKAB CLKBA SAB  
X
X
X
X
X
L
REAL-TIME TRANSFER  
BUS B TO BUS A  
REAL-TIME TRANSFER  
BUS A TO BUS B  
21  
3
1
23  
2
22  
21  
OE  
L
3
DIR  
L
1
23  
2
22  
SBA  
H
DIR CLKAB CLKBA SAB  
SBA  
X
X
X
CLKAB CLKBA SAB  
OE  
X
X
H
X
X
X
X
X
X
X
X
X
H or L  
X
X
H
L
H
H or L  
X
STORAGE FROM  
A, B, OR A AND B  
TRANSFER STORED DATA  
TO A AND/OR B  
Pin numbers shown are for the DW, JT, NT, and W packages.  
Figure 1. Bus-Management Functions  
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443  
SN54BCT646, SN74BCT646  
OCTAL BUS TRANSCEIVERS AND REGISTERS  
WITH 3-STATE OUTPUTS  
SCBS037D − AUGUST 1989 − REVISED MAY 2004  
FUNCTION TABLE  
DATA I/O  
INPUTS  
OPERATION OR FUNCTION  
OE  
X
X
H
H
L
DIR  
X
CLKAB  
CLKBA  
SAB  
X
SBA  
X
A1 THRU A8  
B1 THRU B8  
X
Input  
Unspecified  
Input  
Store A, B unspecified  
X
X
X
X
Unspecified  
Store B, A unspecified  
X
H or L  
X
H or L  
X
X
X
Input  
Input disabled  
Output  
Input  
Store A and B data  
Isolation, hold storage  
Real-time B data to A bus  
Stored B data to A bus  
Real-time A data to B bus  
Stored A data to B bus  
X
X
X
Input disabled  
Input  
L
X
L
L
L
X
H or L  
X
X
H
Output  
Input  
L
H
H
X
L
X
Input  
Output  
L
H or L  
X
H
X
Input  
Output  
The data output functions can be enabled or disabled by various signals at the OE and DIR inputs. Data input functions always are enabled, i.e.,  
data at the bus pins is stored on every low-to-high transition of the clock inputs.  
logic diagram (positive logic)  
21  
OE  
3
DIR  
23  
CLKBA  
22  
SBA  
1
CLKAB  
2
SAB  
One of Eight  
Channels  
1D  
C1  
4
A1  
20  
B1  
1D  
C1  
To Seven Other Channels  
Pin numbers shown are for the DW, JT, NT, and W packages.  
4
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443  
SN54BCT646, SN74BCT646  
OCTAL BUS TRANSCEIVERS AND REGISTERS  
WITH 3-STATE OUTPUTS  
SCBS037D − AUGUST 1989 − REVISED MAY 2004  
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: Control inputs (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V  
I/O ports (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 5.5 V  
Voltage range applied to any output in the disabled or power-off state, V . . . . . . . . . . . . . . . . . −0.5 V to 7 V  
O
Voltage range applied to any output in the high state, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V  
O
CC  
Current into any output in the low state: SN54BCT646 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA  
SN74BCT646 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA  
Package thermal impedance, θ (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46°C/W  
JA  
(see Note 3): NT package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W  
Storage temperature range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C  
stg  
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.  
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.  
2. The package thermal impedance is calculated in accordance with JESD 51-7.  
3. The package thermal impedance is calculated in accordance with JESD 51-3.  
recommended operating conditions (see Note 4)  
SN54BCT646  
MIN NOM MAX  
SN74BCT646  
UNIT  
MIN NOM  
MAX  
V
V
V
Supply voltage  
4.5  
2
5
5.5  
4.5  
2
5
5.5  
V
V
CC  
IH  
IL  
High-level input voltage  
Low-level input voltage  
Input clamp current  
0.8  
−18  
−12  
48  
0.8  
−18  
−15  
64  
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
55  
125  
0
70  
NOTE 4: All unused control inputs of the device must be held at V or GND to ensure proper device operation. Refer to the TI application report,  
CC  
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.  
5
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443  
SN54BCT646, SN74BCT646  
OCTAL BUS TRANSCEIVERS AND REGISTERS  
WITH 3-STATE OUTPUTS  
SCBS037D − AUGUST 1989 − REVISED MAY 2004  
electrical characteristics over recommended operating free-air temperature range (unless  
otherwise noted)  
SN54BCT646  
SN74BCT646  
PARAMETER  
TEST CONDITIONS  
I = −18 mA  
UNIT  
MIN TYP  
MAX  
MIN TYP  
MAX  
V
V
V
V
= 4.5 V,  
= 4.5 V  
−1.2  
−1.2  
V
IK  
CC  
I
I
I
I
I
I
= 3 mA  
= −12 mA  
= −15 mA  
= 48 mA  
= 64 mA  
2.4  
2
3.3  
2.4  
2
3.3  
OH  
OH  
OH  
OL  
OL  
3.2  
V
OH  
CC  
3.1  
0.38  
0.55  
V
OL  
V
CC  
V
CC  
V
CC  
V
CC  
= 4.5 V  
= 5.5 V,  
= 5.5 V,  
= 5.5 V,  
V
0.42  
0.55  
1
A or B port  
1
1
I
I
I
V = 5.5 V  
I
mA  
μA  
mA  
I
Control inputs  
A or B port  
1
70  
70  
V = 2.7 V  
I
IH  
Control inputs  
A or B port  
20  
20  
0.7  
0.7  
0.7  
0.7  
225  
67  
V = 0.5 V  
I
IL  
Control inputs  
§
I
I
I
I
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
= 5.5 V,  
= 5.5 V,  
= 5.5 V,  
= 5.5 V,  
= 5 V,  
V = 0  
O
100  
225 100  
mA  
mA  
mA  
mA  
pF  
OS  
A or B port  
A or B port  
A or B port  
Control inputs  
A or B port  
V = GND  
I
42  
5.6  
10  
6
67  
9
42  
5.6  
10  
6
CCL  
CCH  
CCZ  
V = 4.5 V  
I
9
V = GND  
I
16  
16  
C
C
V = 2.5 V or 0.5 V  
I
i
= 5 V,  
V
O
= 2.5 V or 0.5 V  
12  
14  
pF  
io  
§
All typical values are at V = 5 V, T = 25°C.  
CC  
A
For I/O ports, the parameters I and I include the off-state output current.  
IH  
IL  
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.  
timing requirements over recommended ranges of supply voltage and operating free-air  
temperature (unless otherwise noted)  
V
T
= 5 V,  
= 25°C  
CC  
SN54BCT646  
SN7BCT646  
A
UNIT  
MIN  
MAX  
MIN  
MAX  
MIN  
MAX  
f
t
t
t
Clock frequency  
83  
83  
83  
MHz  
ns  
clock  
Pulse duration, CLK high or low  
Setup time, A or B before CLKABor CLKBA↑  
Hold time, A or B after CLKABor CLKBA↑  
6
6
6
7
6
6
w
ns  
su  
h
0.5  
0.5  
0.5  
ns  
6
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443  
SN54BCT646, SN74BCT646  
OCTAL BUS TRANSCEIVERS AND REGISTERS  
WITH 3-STATE OUTPUTS  
SCBS037D − AUGUST 1989 − REVISED MAY 2004  
switching characteristics over recommended ranges of supply voltage and operating free-air  
temperature, CL = 50 pF (unless otherwise noted) (see Figure 2)  
V
T
= 5 V,  
= 25°C  
CC  
SN54BCT646 SN74BCT646  
FROM  
(INPUT)  
TO  
(OUTPUT)  
A
PARAMETER  
UNIT  
MIN  
83  
TYP  
MAX  
MIN  
83  
MAX  
MIN  
83  
MAX  
f
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
MHz  
ns  
max  
PLH  
PHL  
PLH  
PHL  
PLH  
PHL  
PLH  
PHL  
PZH  
PZL  
PHZ  
PLZ  
PZH  
PZL  
PHZ  
PLZ  
3.6  
3.9  
3.1  
3.7  
4.5  
3.3  
3.9  
4.7  
4
7
7
9.4  
9.2  
3.6  
3.9  
3.1  
3.7  
4.5  
3.3  
3.9  
4.7  
4
12.4  
11.5  
11.1  
12.1  
15.2  
9.8  
3.6  
3.9  
3.1  
3.7  
4.5  
3.3  
3.9  
4.7  
4
11.2  
10.6  
9.5  
CLKBA or CLKAB  
A or B  
A or B  
B or A  
A or B  
A or B  
A or B  
A or B  
A or B  
A or B  
6
8.1  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
6.8  
8.8  
6
8.9  
10.5  
13.8  
9.1  
11.2  
8.1  
SAB or SBA  
(with A or B high)  
7.7  
8.3  
7.9  
8.8  
7.2  
7
10.2  
10.8  
10.7  
11.8  
9.4  
13.3  
13.7  
14  
12  
SAB or SBA  
(with A or B low)  
12.9  
13.2  
14.4  
10.9  
10.5  
13.1  
14.6  
12.6  
11.8  
OE  
4.6  
4
4.6  
4
15.4  
12  
4.6  
4
OE  
DIR  
DIR  
3.4  
2.8  
3.8  
3.8  
3.2  
9.3  
3.4  
2.8  
3.8  
3.8  
3.2  
11.6  
14  
3.4  
2.8  
3.8  
3.8  
3.2  
7.8  
8.9  
8.4  
7.3  
10.7  
11.9  
10.7  
9.9  
15.6  
13.2  
12.6  
These parameters are measured with the internal output state of the storage register opposite that of the bus input.  
7
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443  
SN54BCT646, SN74BCT646  
OCTAL BUS TRANSCEIVERS AND REGISTERS  
WITH 3-STATE OUTPUTS  
SCBS037D − AUGUST 1989 − REVISED MAY 2004  
PARAMETER MEASUREMENT INFORMATION  
7 V (t  
, t  
, O.C.)  
PZL PLZ  
Open  
(all others)  
S1  
From Output  
Under Test  
Test  
Point  
C
L
R1  
R1  
(see Note A)  
From Output  
Under Test  
Test  
Point  
C
L
R2  
(see Note A)  
LOAD CIRCUIT FOR  
TOTEM-POLE OUTPUTS  
R = R1 = R2  
L
LOAD CIRCUIT FOR  
3-STATE AND OPEN-COLLECTOR OUTPUTS  
High-Level  
Pulse  
(see Note B)  
3 V  
0 V  
1.5 V  
1.5 V  
3 V  
Timing Input  
(see Note B)  
1.5 V  
t
w
0 V  
3 V  
0 V  
3 V  
0 V  
t
h
Low-Level  
Pulse  
t
1.5 V  
su  
1.5 V  
Data Input  
(see Note B)  
1.5 V  
1.5 V  
VOLTAGE WAVEFORMS  
PULSE DURATION  
VOLTAGE WAVEFORMS  
SETUP AND HOLD TIMES  
3 V  
0 V  
Output  
Control  
(low-level enable)  
3 V  
0 V  
1.5 V  
1.5 V  
Input  
(see Note B)  
1.5 V  
1.5 V  
t
PZL  
t
t
PLZ  
PHL  
t
PLH  
3.5 V  
In-Phase  
Output  
(see Note D)  
V
V
OH  
1.5 V  
Waveform 1  
(see Notes C and D)  
1.5 V  
1.5 V  
1.5 V  
V
OL  
OL  
0.3 V  
t
t
PHZ  
PLH  
t
PHL  
t
PZH  
V
V
V
OH  
Out-of-Phase  
Output  
(see Note D)  
OH  
Waveform 2  
(see Notes C and D)  
1.5 V  
1.5 V  
0.3 V  
0 V  
OL  
VOLTAGE WAVEFORMS  
PROPAGATION DELAY TIMES (see Note D)  
VOLTAGE WAVEFORMS  
ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS  
NOTES: A. C includes probe and jig capacitance.  
L
B. All input pulses are supplied by generators having the following characteristics: PRR 10 MHz, t = t 2.5 ns, duty cycle = 50%.  
r
f
C. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.  
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.  
D. The outputs are measured one at a time, with one transition per measurement.  
E. When measuring propagation delay times of 3-state outputs, switch S1 is open.  
F. All parameters and waveforms are not applicable to all devices.  
Figure 2. Load Circuit and Voltage Waveforms  
8
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443  
PACKAGE OPTION ADDENDUM  
www.ti.com  
25-Sep-2013  
PACKAGING INFORMATION  
Orderable Device  
Status Package Type Package Pins Package  
Eco Plan Lead/Ball Finish  
MSL Peak Temp  
Op Temp (°C)  
Device Marking  
Samples  
Drawing  
Qty  
(1)  
(2)  
(3)  
(4/5)  
5962-9155501M3A  
ACTIVE  
LCCC  
FK  
28  
1
TBD  
POST-PLATE  
N / A for Pkg Type  
-55 to 125  
5962-  
9155501M3A  
SNJ54BCT  
646FK  
5962-9155501MKA  
5962-9155501MLA  
ACTIVE  
ACTIVE  
CFP  
W
24  
24  
1
1
TBD  
TBD  
A42  
A42  
N / A for Pkg Type  
N / A for Pkg Type  
-55 to 125  
-55 to 125  
5962-9155501MK  
A
SNJ54BCT646W  
CDIP  
JT  
5962-9155501ML  
A
SNJ54BCT646JT  
SN74BCT646DW  
SN74BCT646DWE4  
SN74BCT646DWG4  
SN74BCT646NT  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
SOIC  
PDIP  
PDIP  
LCCC  
DW  
DW  
DW  
NT  
24  
24  
24  
24  
24  
28  
25  
25  
25  
15  
15  
1
Green (RoHS  
& no Sb/Br)  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
CU NIPDAU  
POST-PLATE  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
Level-1-260C-UNLIM  
N / A for Pkg Type  
N / A for Pkg Type  
N / A for Pkg Type  
0 to 70  
0 to 70  
BCT646  
Green (RoHS  
& no Sb/Br)  
BCT646  
Green (RoHS  
& no Sb/Br)  
0 to 70  
BCT646  
Pb-Free  
(RoHS)  
0 to 70  
SN74BCT646NT  
SN74BCT646NT  
SN74BCT646NTE4  
SNJ54BCT646FK  
NT  
Pb-Free  
(RoHS)  
0 to 70  
FK  
TBD  
-55 to 125  
5962-  
9155501M3A  
SNJ54BCT  
646FK  
SNJ54BCT646JT  
SNJ54BCT646W  
ACTIVE  
ACTIVE  
CDIP  
CFP  
JT  
W
24  
24  
1
1
TBD  
TBD  
A42  
A42  
N / A for Pkg Type  
N / A for Pkg Type  
-55 to 125  
-55 to 125  
5962-9155501ML  
A
SNJ54BCT646JT  
5962-9155501MK  
A
SNJ54BCT646W  
(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.  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
25-Sep-2013  
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), 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.  
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between  
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.  
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.  
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.  
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation  
of the previous line and the two combined represent the entire Device Marking for that device.  
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.  
OTHER QUALIFIED VERSIONS OF SN54BCT646, SN74BCT646 :  
Catalog: SN74BCT646  
Military: SN54BCT646  
NOTE: Qualified Version Definitions:  
Catalog - TI's standard catalog product  
Military - QML certified for Military and Defense Applications  
Addendum-Page 2  
MECHANICAL DATA  
MCER004A – JANUARY 1995 – REVISED JANUARY 1997  
JT (R-GDIP-T**)  
CERAMIC DUAL-IN-LINE  
24 LEADS SHOWN  
PINS **  
A
24  
28  
DIM  
13  
24  
1.280  
(32,51) (37,08)  
1.460  
A MAX  
1.240  
(31,50) (36,58)  
1.440  
B
A MIN  
B MAX  
B MIN  
0.300  
(7,62)  
0.291  
(7,39)  
1
12  
0.070 (1,78)  
0.030 (0,76)  
0.245  
(6,22)  
0.285  
(7,24)  
0.320 (8,13)  
0.290 (7,37)  
0.015 (0,38) MIN  
0.100 (2,54) MAX  
0.200 (5,08) MAX  
Seating Plane  
0.130 (3,30) MIN  
0.023 (0,58)  
0.015 (0,38)  
0°–15°  
0.014 (0,36)  
0.008 (0,20)  
0.100 (2,54)  
4040110/C 08/96  
NOTES: A. All linear dimensions are in inches (millimeters).  
B. This drawing is subject to change without notice.  
C. This package can be hermetically sealed with a ceramic lid using glass frit.  
D. Index point is provided on cap for terminal identification.  
E. Falls within MIL STD 1835 GDIP3-T24, GDIP4-T28, and JEDEC MO-058 AA, MO-058 AB  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
MECHANICAL DATA  
MCFP007 – OCTOBER 1994  
W (R-GDFP-F24)  
CERAMIC DUAL FLATPACK  
0.375 (9,53)  
0.340 (8,64)  
Base and Seating Plane  
0.006 (0,15)  
0.004 (0,10)  
0.045 (1,14)  
0.026 (0,66)  
0.090 (2,29)  
0.045 (1,14)  
0.395 (10,03)  
0.360 (9,14)  
0.360 (9,14)  
0.240 (6,10)  
0.360 (9,14)  
0.240 (6,10)  
0.019 (0,48)  
0.015 (0,38)  
1
24  
0.050 (1,27)  
0.640 (16,26)  
0.490 (12,45)  
0.030 (0,76)  
0.015 (0,38)  
12  
13  
30° TYP  
1.115 (28,32)  
0.840 (21,34)  
4040180-5/B 03/95  
NOTES: A. All linear dimensions are in inches (millimeters).  
B. This drawing is subject to change without notice.  
C. This package can be hermetically sealed with a ceramic lid using glass frit.  
D. Falls within MIL-STD-1835 GDFP2-F24 and JEDEC MO-070AD  
E. Index point is provided on cap for terminal identification only.  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
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TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms  
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