SN74GTLPH16945DGGR [TI]

GTLP SERIES, DUAL 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO48, PLASTIC, TSSOP-48;
SN74GTLPH16945DGGR
型号: SN74GTLPH16945DGGR
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

GTLP SERIES, DUAL 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO48, PLASTIC, TSSOP-48

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SN74GTLPH16945  
16-BIT LVTTL-TO-GTLP BUS TRANSCEIVER  
SCES292D – OCTOBER 1999 – REVISED NOVEMBER 2001  
DGG OR DGV PACKAGE  
(TOP VIEW)  
Member of the Texas Instruments  
Widebus Family  
TI-OPC Circuitry Limits Ringing on  
Unevenly Loaded Backplanes  
1
48  
47  
46  
45  
44  
43  
42  
41  
40  
39  
38  
37  
36  
35  
34  
33  
32  
31  
30  
29  
28  
27  
26  
25  
1DIR  
1A1  
1A2  
GND  
1A3  
1A4  
1OE  
1B1  
1B2  
GND  
1B3  
1B4  
BIAS V  
1B5  
1B6  
GND  
1B7  
1B8  
2B1  
2B2  
GND  
2B3  
2B4  
2
OEC Circuitry Improves Signal Integrity  
and Reduces Electromagnetic Interference  
3
4
5
Bidirectional Interface Between GTLP  
Signal Levels and LVTTL Logic Levels  
6
7
V
LVTTL Interfaces Are 5-V Tolerant  
Medium-Drive GTLP Outputs (50 mA)  
LVTTL Outputs (–24 mA/24 mA)  
CC  
CC  
8
1A5  
1A6  
GND  
1A7  
1A8  
2A1  
2A2  
GND  
2A3  
2A4  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
GTLP Rise and Fall Times Designed for  
Optimal Data-Transfer Rate and Signal  
Integrity in Distributed Loads  
I
, Power-Up 3-State, and BIAS V  
CC  
off  
Support Live Insertion  
Bus Hold on A-Port Data Inputs  
Distributed V  
High-Speed Switching Noise  
and GND Pins Minimize  
CC  
V
V
CC  
REF  
2A5  
2A6  
GND  
2A7  
2A8  
2B5  
2B6  
GND  
2B7  
2B8  
2OE  
Latch-Up Performance Exceeds 100 mA Per  
JESD 78, Class II  
description  
2DIR  
The SN74GTLPH16945 is a medium-drive, 16-bit  
bustransceiverthatprovidesLVTTL-to-GTLPand  
GTLP-to-LVTTL signal-level translation. It is  
partitioned as two 8-bit transceivers. The device  
provides a high-speed interface between cards  
operating at LVTTL logic levels and a backplane operating at GTLP signal levels. High-speed (about three times  
faster than standard TTL or LVTTL) backplane operation is a direct result of GTLP’s reduced output swing  
(<1 V), reduced input threshold levels, improved differential input, OEC circuitry, and TI-OPC circuitry.  
Improved GTLP OEC and TI-OPC circuits minimize bus-settling time and have been designed and tested using  
several backplane models. The medium drive allows incident-wave switching in heavily loaded backplanes with  
equivalent load impedance down to 19 .  
GTLP is the Texas Instruments derivative of the Gunning Transceiver Logic (GTL) JEDEC standard JESD 8-3.  
The ac specification of the SN74GTLPH16945 is given only at the preferred higher noise margin GTLP, but the  
user has the flexibility of using this device at either GTL (V = 1.2 V and V  
= 0.8 V) or GTLP (V = 1.5 V  
TT  
REF  
TT  
and V  
= 1 V) signal levels.  
REF  
Normally, the B port operates at GTLP signal levels. The A-port and control inputs operate at LVTTL logic levels  
but are 5-V tolerant and are compatible with TTL and 5-V CMOS inputs. V  
reference voltage.  
is the B-port differential input  
REF  
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.  
OEC, TI-OPC, and Widebus are trademarks of Texas Instruments.  
Copyright 2001, 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.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
SN74GTLPH16945  
16-BIT LVTTL-TO-GTLP BUS TRANSCEIVER  
SCES292D OCTOBER 1999 REVISED NOVEMBER 2001  
description (continued)  
This device is fully specified for live-insertion applications using I , power-up 3-state, and BIAS V . The I  
off  
off  
CC  
circuitry disables the outputs, preventing damaging current backflow through the device when it is powered  
down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power  
down, which prevents driver conflict. The BIAS V  
circuitry precharges and preconditions the B-port  
CC  
input/output connections, preventing disturbance of active data on the backplane during card insertion or  
removal, and permits true live-insertion capability.  
This GTLP device features TI-OPC circuitry, which actively limits overshoot caused by improperly terminated  
backplanes, unevenly distributed cards, or empty slots during low-to-high signal transitions. This improves  
signal integrity, which allows adequate noise margin to be maintained at higher frequencies.  
Active bus-hold circuitry holds unused or undriven LVTTL data inputs at a valid logic state. Use of pullup or  
pulldown resistors with the bus-hold circuitry is not recommended.  
When V  
is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down.  
CC  
However, to ensure the high-impedance state above 1.5 V, the output-enable (OE) input should be tied to V  
CC  
through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of  
the driver.  
GQL PACKAGE  
(TOP VIEW)  
terminal assignments  
1
2
3
4
5
6
1
2
3
4
5
6
A
B
C
D
E
F
A
B
C
D
E
F
1DIR  
1A2  
1A4  
1A6  
2A8  
2A1  
2A3  
2A5  
2A7  
2DIR  
NC  
NC  
NC  
NC  
1OE  
1B2  
1B4  
1B6  
1B8  
2B1  
2B3  
2B5  
2B7  
2OE  
1A1  
1A3  
1A5  
1A7  
2A2  
2A4  
2A6  
2A8  
NC  
GND  
GND  
1B1  
1B3  
1B5  
1B7  
2B2  
2B4  
2B6  
2B8  
NC  
V
CC  
BIAS V  
CC  
GND  
GND  
G
H
J
GND  
GND  
G
H
J
V
CC  
V
REF  
GND  
NC  
GND  
K
NC  
K
NC No internal connection  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
T
PACKAGE  
A
MARKING  
GTLPH16945  
GL945  
TSSOP DGG  
Tape and reel  
Tape and reel  
Tape and reel  
SN74GTLPH16945GR  
SN74GTLPH16945VR  
SN74GTLPH16945KR  
40°C to 85°C TVSOP DGV  
VFBGA GQL  
GL945  
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines  
are available at www.ti.com/sc/package.  
2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
SN74GTLPH16945  
16-BIT LVTTL-TO-GTLP BUS TRANSCEIVER  
SCES292D OCTOBER 1999 REVISED NOVEMBER 2001  
functional description  
The SN74GTLPH16945 is a medium-drive (50 mA), 16-bit bus transceiver partitioned as two 8-bit segments  
and is designed for asynchronous communication between data buses. The device transmits data from the  
A port to the B port or from the B port to the A port, depending on the logic level at the direction-control (DIR)  
input. OE can be used to disable the device so the buses are effectively isolated. Data polarity is noninverting.  
For A-to-B data flow, when OE is low and DIR is high, the B outputs take on the logic value of the A inputs. When  
OE is high, the outputs are in the high-impedance state.  
The data flow for B to A is similar to that of A to B, except OE and DIR are low.  
FUNCTION TABLE  
INPUTS  
OUTPUT  
MODE  
Isolation  
OE  
H
DIR  
X
Z
L
L
B data to A port  
A data to B port  
True transparent  
L
H
logic diagram (positive logic)  
1
1DIR  
48  
47  
1OE  
1B1  
2
1A1  
31  
V
REF  
To Seven Other Channels  
24  
2DIR  
25  
36  
2OE  
2B1  
13  
2A1  
To Seven Other Channels  
Pin numbers shown are for the DGG and DGV packages.  
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
SN74GTLPH16945  
16-BIT LVTTL-TO-GTLP BUS TRANSCEIVER  
SCES292D OCTOBER 1999 REVISED NOVEMBER 2001  
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)  
Supply voltage range, V  
and BIAS V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 4.6 V  
CC  
CC  
Input voltage range, V (see Note 1): A port and control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V  
I
B port and V  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 4.6 V  
REF  
Voltage range applied to any output in the high-impedance or power-off state, V  
O
(see Note 1): A port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V  
B port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 4.6 V  
Current into any output in the low state, I : A port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA  
O
B port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA  
Current into any A port output in the high state, I (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA  
O
Continuous current through each V  
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA  
CC  
Input clamp current, I (V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA  
(V < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA  
Package thermal impedance, θ (see Note 3): DGG package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W  
IK  
I
Output clamp current, I  
OK  
O
JA  
DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W  
GQL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/W  
Storage temperature range, T  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C  
stg  
Stresses beyond those listed under absolute maximum ratingsmay 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 conditionsis not  
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.  
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.  
2. This current flows only when the output is in the high state and V > V  
.
CC  
O
3. The package thermal impedance is calculated in accordance with JESD 51-7.  
4
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
SN74GTLPH16945  
16-BIT LVTTL-TO-GTLP BUS TRANSCEIVER  
SCES292D OCTOBER 1999 REVISED NOVEMBER 2001  
recommended operating conditions (see Notes 4 through 7)  
MIN  
NOM  
MAX  
UNIT  
V
,
CC  
BIAS V  
Supply voltage  
3.15  
3.3  
3.45  
V
CC  
GTL  
1.14  
1.35  
0.74  
0.87  
1.2  
1.5  
0.8  
1
1.26  
1.65  
0.87  
1.1  
V
V
V
V
V
Termination voltage  
V
V
V
V
V
TT  
REF  
I
GTLP  
GTL  
Reference voltage  
Input voltage  
GTLP  
B port  
V
TT  
5.5  
Except B port  
B port  
V
CC  
V
+0.05  
REF  
High-level input voltage  
Low-level input voltage  
IH  
IL  
Except B port  
B port  
2
V
0.05  
REF  
Except B port  
0.8  
18  
24  
24  
I
I
Input clamp current  
mA  
mA  
IK  
High-level output current  
A port  
OH  
OL  
A port  
I
Low-level output current  
mA  
B port  
50  
t/v  
t/V  
Input transition rise or fall rate  
Power-up ramp rate  
Outputs enabled  
10  
ns/V  
µs/V  
°C  
20  
CC  
T
A
Operating free-air temperature  
40  
85  
NOTES: 4. All unused 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. Proper connection sequence for use of the B-port I/O precharge feature is GND and BIAS V  
= 3.3 V first, I/O second, and  
CC  
V
CC  
= 3.3 Vlast,becausetheBIASV  
prechargecircuitryisdisabledwhenanyV  
CC CC  
pinisconnected.ThecontrolandV inputs  
REF  
can be connected anytime, but normally are connected during the I/O stage. If B-port precharge is not required, any connection  
sequence is acceptable, but generally, GND is connected first.  
6.  
7.  
V
V
and R can be adjusted to accommodate backplane impedances if the dc recommended I  
ratings are not exceeded.  
can be adjusted to optimize noise margins, but normally is two-thirds V . TI-OPC circuitry is enabled in the A-to-B direction  
TT  
TT OL  
REF  
TT  
and is activated when V > 0.7 V above V  
minimize current drain.  
. If operated in the A-to-B direction, V  
should be set to within 0.6 V of V to  
TT  
TT  
REF REF  
5
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
SN74GTLPH16945  
16-BIT LVTTL-TO-GTLP BUS TRANSCEIVER  
SCES292D OCTOBER 1999 REVISED NOVEMBER 2001  
electrical characteristics over recommended operating free-air temperature range for GTLP  
(unless otherwise noted)  
TYP  
PARAMETER  
TEST CONDITIONS  
MIN  
MAX  
UNIT  
V
V
V
= 3.15 V,  
I = 18 mA  
1.2  
V
IK  
CC  
I
= 3.15 V to 3.45 V,  
I
I
I
I
I
I
I
I
I
I
= 100 µA  
= 12 mA  
= 24 mA  
= 100 µA  
= 12 mA  
= 24 mA  
= 100 µA  
= 10 mA  
= 40 mA  
= 50 mA  
V
CC  
0.2  
CC  
OH  
OH  
OH  
OL  
OL  
OL  
OL  
OL  
OL  
OL  
V
OH  
A port  
2.4  
2
V
V
CC  
V
CC  
V
CC  
V
CC  
= 3.15 V  
= 3.15 V to 3.45 V,  
= 3.15 V  
0.2  
0.4  
0.5  
0.2  
0.2  
0.4  
0.55  
±10  
10  
A port  
V
OL  
= 3.15 V to 3.45 V,  
V
B port  
V
CC  
= 3.15 V  
I
I
V
V
= 3.45 V,  
= 3.45 V  
V = 0 or 5.5 V  
I
µA  
µA  
Control inputs  
CC  
V
O
V
O
V
O
= V  
CC  
A port  
I
CC  
OZH  
= 1.5 V  
= GND  
10  
B port  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
= 3.45 V,  
= 3.15 V,  
= 3.15 V,  
= 3.45 V,  
= 3.45 V,  
10  
µA  
µA  
µA  
µA  
µA  
I
I
I
I
I
A and B ports  
A port  
OZL  
BHL  
BHH  
§
V = 0.8 V  
I
75  
75  
A port  
V = 2 V  
I
#
A port  
V = 0 to V  
500  
BHLO  
I
CC  
CC  
||  
A port  
V = 0 to V  
I
500  
BHHO  
Outputs high  
Outputs low  
50  
50  
50  
V
= 3.45 V, I = 0,  
O
CC  
I
A or B port  
mA  
V (A-port or control input) = V  
or GND,  
CC  
I
CC  
V (B port) = V or GND  
I
TT  
Outputs disabled  
V
= 3.45 V, One A-port or control input at V  
0.6 V,  
CC  
CC  
1.5  
mA  
pF  
I  
CC  
Other A-port or control inputs at V  
or GND  
CC  
C
C
Control inputs  
A port  
V = 3.15 V or 0  
I
4.5  
7.5  
7.5  
5
9
9
i
V
= 3.15 V or 0  
= 1.5 V or 0  
O
O
pF  
io  
B port  
V
§
All typical values are at V  
For I/O ports, the parameters I  
OZH  
The bus-hold circuit can sink at least the minimum low sustaining current at V max. I  
= 3.3 V, T = 25°C.  
A
CC  
and I  
include the input leakage current.  
OZL  
should be measured after lowering V to GND and  
BHL IN  
IL  
then raising it to V max.  
IL  
The bus-hold circuit can source at least the minimum high sustaining current at V min. I  
should be measured after raising V to V  
IN  
and  
CC  
IH  
BHH  
then lowering it to V min.  
IH  
An external driver must source at least I  
An external driver must sink at least I  
BHHO  
This is the increase in supply current for each input that is at the specified TTL voltage level rather than V  
#
||  
to switch this node from low to high.  
BHLO  
to switch this node from high to low.  
or GND.  
CC  
hot-insertion specifications for A port over recommended operating free-air temperature range  
PARAMETER  
TEST CONDITIONS  
BIAS V = 0,  
MIN  
MAX  
10  
UNIT  
µA  
I
I
I
V
CC  
V
CC  
V
CC  
= 0,  
V or V = 0 to 5.5 V  
I O  
off  
CC  
= 0 to 1.5 V,  
= 1.5 V to 0,  
V
= 0.5 V to 3 V,  
= 0.5 V to 3 V,  
OE = 0  
OE = 0  
±30  
±30  
µA  
OZPU  
OZPD  
O
O
V
µA  
6
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
SN74GTLPH16945  
16-BIT LVTTL-TO-GTLP BUS TRANSCEIVER  
SCES292D OCTOBER 1999 REVISED NOVEMBER 2001  
live-insertion specifications for B port over recommended operating free-air temperature range  
PARAMETER  
TEST CONDITIONS  
MIN  
MAX  
10  
UNIT  
µA  
µA  
µA  
mA  
µA  
V
I
I
I
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
= 0,  
BIAS V  
BIAS V  
BIAS V  
= 0,  
= 0,  
= 0,  
V or V = 0 to 1.5 V  
off  
CC  
CC  
CC  
I
O
= 0 to 1.5 V,  
= 1.5 V to 0,  
= 0 to 3.15 V  
= 3.15 V to 3.45 V  
= 0,  
V
= 0.5 V to 1.5 V, OE = 0  
±30  
±30  
5
OZPU  
OZPD  
O
O
V
= 0.5 V to 1.5 V, OE = 0  
I
(BIAS V  
CC  
)
BIAS V  
= 3.15 V to 3.45 V,  
V
O
(B port) = 0 to 1.5 V  
CC  
CC  
10  
V
BIAS V  
BIAS V  
= 3.3 V,  
I
O
= 0  
0.95  
1.05  
O
CC  
I
= 0,  
= 3.15 V to 3.45 V,  
V
O
(B port) = 0.6 V  
1  
µA  
O
CC  
switching characteristics over recommended ranges of supply voltage and operating free-air  
temperature, V = 1.5 V and V  
= 1 V for GTLP (see Figure 1)  
TT  
REF  
FROM  
(INPUT)  
TO  
(OUTPUT)  
PARAMETER  
MIN TYP  
MAX  
UNIT  
t
t
t
t
t
t
t
t
t
t
2.1  
2.1  
2
6.3  
6.3  
6.9  
6.9  
PLH  
PHL  
en  
A
B
B
ns  
ns  
OE  
2
dis  
r
Rise time, B outputs (20% to 80%)  
Fall time, B outputs (80% to 20%)  
2.5  
2.1  
ns  
ns  
f
2.1  
2.1  
0.3  
0.3  
5.3  
5.3  
5.7  
5.7  
PLH  
PHL  
en  
B
A
A
ns  
ns  
OE  
dis  
All typical values are at V  
= 3.3 V, T = 25°C.  
A
CC  
7
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
SN74GTLPH16945  
16-BIT LVTTL-TO-GTLP BUS TRANSCEIVER  
SCES292D OCTOBER 1999 REVISED NOVEMBER 2001  
PARAMETER MEASUREMENT INFORMATION  
1.5 V  
25 Ω  
6 V  
Open  
GND  
S1  
500 Ω  
From Output  
Under Test  
TEST  
S1  
Open  
6 V  
From Output  
Under Test  
Test  
Point  
t
t
t
/t  
PLH PHL  
/t  
C
= 50 pF  
L
500 Ω  
PLZ PZL  
/t  
(see Note A)  
C
= 30 pF  
(see Note A)  
L
GND  
PHZ PZH  
LOAD CIRCUIT FOR A OUTPUTS  
LOAD CIRCUIT FOR B OUTPUTS  
3 V  
0 V  
1.5 V  
1.5 V  
Input  
t
t
PHL  
PLH  
V
V
OH  
1 V  
1 V  
Output  
3 V  
OL  
Output  
Control  
1.5 V  
1.5 V  
VOLTAGE WAVEFORMS  
PROPAGATION DELAY TIMES  
(A port to B port)  
0 V  
3 V  
t
t
PLZ  
PZL  
Output  
Waveform 1  
S1 at 6 V  
1.5 V  
0 V  
1 V  
1 V  
1.5 V  
Input  
V
OL  
+ 0.3 V  
(see Note B)  
V
OL  
OH  
t
t
PHL  
t
t
PLH  
PZH  
PHZ  
Output  
Waveform 2  
S1 at GND  
V
V
OH  
V
OH  
0.3 V  
1.5 V  
1.5 V  
Output  
1.5 V  
V
OL  
0 V  
(see Note B)  
VOLTAGE WAVEFORMS  
PROPAGATION DELAY TIMES  
(B port to A port)  
VOLTAGE WAVEFORMS  
ENABLE AND DISABLE TIMES  
(A port)  
NOTES: A.  
C includes probe and jig capacitance.  
L
B. 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.  
C. All input pulses are supplied by generators having the following characteristics: PRR 10 MHz, Z = 50 , t 2 ns, t 2 ns.  
O
r
f
D. The outputs are measured one at a time with one transition per measurement.  
Figure 1. Load Circuits and Voltage Waveforms  
8
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
SN74GTLPH16945  
16-BIT LVTTL-TO-GTLP BUS TRANSCEIVER  
SCES292D OCTOBER 1999 REVISED NOVEMBER 2001  
DISTRIBUTED-LOAD BACKPLANE SWITCHING CHARACTERISTICS  
The preceding switching characteristics table shows the switching characteristics of the device into a lumped load  
(Figure 1). However, the designers backplane application probably is a distributed load. The physical representation  
is shown in Figure 2. This backplane, or distributed load, can be approximated closely to a resistor inductance  
capacitance (RLC) circuit, as shown in Figure 3. This device has been designed for optimum performance in this RLC  
circuit. The following switching characteristics table shows the switching characteristics of the device into the RLC  
load, to help the designer better understand the performance of the GTLP device in this typical backplane. See  
www.ti.com/sc/gtlp for more information.  
1.5 V  
1.5 V  
Z
O
= 70 Ω  
.25”  
2”  
2”  
.25”  
1.5 V  
19 Ω  
Conn.  
Conn.  
Conn.  
Conn.  
L
L
= 19 nH  
From Output  
Under Test  
Test  
Point  
1”  
1”  
1”  
1”  
C
= 9 pF  
L
Rcvr  
Rcvr  
Rcvr  
Drvr  
Slot 1  
Slot 2  
Slot 9  
Slot 10  
Figure 2. Medium-Drive Test Backplane  
Figure 3. Medium-Drive RLC Network  
switching characteristics over recommended ranges of supply voltage and operating free-air  
temperature, V = 1.5 V and V  
= 1 V for GTLP (see Figure 3)  
TT  
REF  
FROM  
(INPUT)  
TO  
(OUTPUT)  
TYP  
PARAMETER  
UNIT  
t
t
t
t
t
t
4.3  
4.3  
5
PLH  
PHL  
en  
dis  
r
A
B
B
ns  
ns  
OE  
4.4  
1
Rise time, B outputs (20% to 80%)  
Fall time, B outputs (80% to 20%)  
ns  
ns  
2
f
All typical values are at V  
= 3.3 V, T = 25°C. All values are derived from TI-SPICE models.  
CC  
A
9
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
PACKAGE OPTION ADDENDUM  
www.ti.com  
25-Feb-2005  
PACKAGING INFORMATION  
Orderable Device  
SN74GTLPH16945GR  
SN74GTLPH16945VR  
Status (1)  
ACTIVE  
ACTIVE  
Package Package  
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)  
Qty  
Type  
Drawing  
TSSOP  
DGG  
48  
2000  
Pb-Free  
(RoHS)  
CU NIPDAU Level-1-250C-UNLIM  
TVSOP  
DGV  
48  
2000  
Pb-Free  
(RoHS)  
CU NIPDAU Level-1-250C-UNLIM  
(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 - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional  
product content details.  
None: Not yet available Lead (Pb-Free).  
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" and in addition, uses package materials that do not contain halogens,  
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.  
(3)  
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry standard classifications, and peak solder  
temperature.  
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.  
Addendum-Page 1  
MECHANICAL DATA  
MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000  
DGV (R-PDSO-G**)  
PLASTIC SMALL-OUTLINE  
24 PINS SHOWN  
0,23  
0,13  
M
0,07  
0,40  
24  
13  
0,16 NOM  
4,50  
4,30  
6,60  
6,20  
Gage Plane  
0,25  
0°ā8°  
0,75  
1
12  
0,50  
A
Seating Plane  
0,08  
0,15  
0,05  
1,20 MAX  
PINS **  
14  
16  
20  
24  
38  
48  
56  
DIM  
A MAX  
A MIN  
3,70  
3,50  
3,70  
3,50  
5,10  
4,90  
5,10  
4,90  
7,90  
7,70  
9,80  
9,60  
11,40  
11,20  
4073251/E 08/00  
NOTES: A. All linear dimensions are in millimeters.  
B. This drawing is subject to change without notice.  
C. Body dimensions do not include mold flash or protrusion, not to exceed 0,15 per side.  
D. Falls within JEDEC: 24/48 Pins – MO-153  
14/16/20/56 Pins – MO-194  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
MECHANICAL DATA  
MTSS003D – JANUARY 1995 – REVISED JANUARY 1998  
DGG (R-PDSO-G**)  
PLASTIC SMALL-OUTLINE PACKAGE  
48 PINS SHOWN  
0,27  
0,17  
M
0,08  
0,50  
48  
25  
6,20  
6,00  
8,30  
7,90  
0,15 NOM  
Gage Plane  
0,25  
1
24  
0°8°  
A
0,75  
0,50  
Seating Plane  
0,10  
0,15  
0,05  
1,20 MAX  
PINS **  
48  
56  
64  
DIM  
A MAX  
12,60  
12,40  
14,10  
13,90  
17,10  
16,90  
A MIN  
4040078/F 12/97  
NOTES: A. All linear dimensions are in millimeters.  
B. This drawing is subject to change without notice.  
C. Body dimensions do not include mold protrusion not to exceed 0,15.  
D. Falls within JEDEC MO-153  
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  
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  
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Applications  
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Amplifiers  
amplifier.ti.com  
www.ti.com/audio  
Data Converters  
dataconverter.ti.com  
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dsp.ti.com  
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Copyright 2005, Texas Instruments Incorporated  

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