TI DS90C385A

DS90C385A
www.ti.com
SNLS167K – MARCH 2004 – REVISED APRIL 2013
+3.3V Programmable LVDS Transmitter 24-Bit Flat Panel Display Link-87.5 MHz
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FEATURES
DESCRIPTION
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The DS90C385A is a pin to pin compatible
replacement for DS90C383, DS90C383A and
DS90C385. The DS90C385A has additional features
and improvements making it an ideal replacement for
DS90C383, DS90C383A and DS90C385. family of
LVDS Transmitters.
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Pin-to-Pin Compatible to DS90C383,
DS90C383A and DS90C385
No Special Start-Up Sequence Required
between Clock/Data and /PD Pins. Input
Signals (Clock and Data) can be Applied Either
Before or After the Device is Powered.
Support Spread Spectrum Clocking up to
100kHz Frequency Modulation and Deviations
of ±2.5% Center Spread or -5% Down Spread
“Input Clock Detection" Feature Will Pull All
LVDS Pairs to Logic Low When Input Clock is
Missing and When /PD Pin is Logic High
18 to 87.5 MHz Shift Clock Support
Tx Power Consumption < 147 mW (typ) at
87.5MHz Grayscale
Tx Power-Down Mode < 60 μW (typ)
Supports VGA, SVGA, XGA, SXGA(Dual Pixel),
SXGA+(Dual Pixel), UXGA(Dual Pixel).
Narrow Bus Reduces Cable Size and Cost
Up to 2.45 Gbps Throughput
Up to 306.25Megabyte/sec Bandwidth
345 mV (typ) Swing LVDS Devices for Low EMI
PLL Requires No External Components
Compliant to TIA/EIA-644 LVDS standard
Low Profile 56-lead TSSOP Package
The DS90C385A transmitter converts 28 bits of
LVCMOS/LVTTL data into four LVDS (Low Voltage
Differential Signaling) data streams. A phase-locked
transmit clock is transmitted in parallel with the data
streams over the fifth LVDS link. Every cycle of the
transmit clock 28 bits of input data are sampled and
transmitted. At a transmit clock frequency of 87.5
MHz, 24 bits of RGB data and 3 bits of LCD timing
and control data (FPLINE, FPFRAME, DRDY) are
transmitted at a rate of 612.5Mbps per LVDS data
channel. Using a 87.5 MHz clock, the data throughput
is 306.25Mbytes/sec. This transmitter can be
programmed for Rising edge strobe or Falling edge
strobe through a dedicated pin. A Rising edge or
Falling edge strobe transmitter will interoperate with a
Falling edge strobe FPDLink Receiver without any
translation logic.
This chipset is an ideal means to solve EMI and
cable size problems associated with wide, high-speed
TTL interfaces with added Spread Spectrum Clocking
support.
Block Diagram
Figure 1. DS90C385A
1
2
3
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.
TRI-STATE is a registered trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004–2013, Texas Instruments Incorporated
DS90C385A
SNLS167K – MARCH 2004 – REVISED APRIL 2013
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings (1)
Supply Voltage (VCC)
-0.3V to +4V
CMOS/TTL Input Voltage
-0.5V to (VCC + 0.3V)
LVDS Driver Output Voltage
-0.3V to (VCC + 0.3V)
LVDS Output Short Circuit Duration
Continuous
Junction Temperature
+150°C
Storage Temperature
-65°C to +150°C
Lead Temperature (Soldering, 4 seconds)
+260°C
Maximum Package Power Dissipation Capacity at 25°C
TSSOP Package
1.63 W
Package Derating
12.5 mW/°C above +25°C
ESD Rating
HBM, 1.5kΩ, 100pF
7kV
EIAJ, 0Ω, 200 pF
500V
Latch Up Tolerance at 25°C
(1)
±100mA
“Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be ensured. They are not meant to imply
that the device should be operated at these limits. The tables of “Electrical Characteristics" specify conditions for device operation.
Recommended Operating Conditions
Min
Nom
Max
Supply Voltage (VCC)
3.0
3.3
3.6
V
Operating Free Air Temperature (TA)
-10
+25
+70
°C
200
mVPP
87.5
MHz
Supply Noise Voltage (VCC)
TxCLKIN frequency
2
18
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Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
LVCMOS/LVTTL DC SPECIFICATIONS
VIH
High Level Input Voltage
2.0
VCC
V
VIL
Low Level Input Voltage
0
0.8
V
VCL
Input Clamp Voltage
ICL = -18 mA
-0.79
-1.5
V
IIN
Input Current
VIN = 0.4V, 2.5V or VCC
+1.8
+10
μA
VIN = GND
-10
0
RL = 100Ω
250
345
μA
LVDS DC SPECIFICATIONS
VOD
Differential Output Voltage
ΔVOD
Change in VOD between
complimentary output states
VOS
Offset Voltage
ΔVOS
Change in VOS between
complimentary output states
IOS
Output Short Circuit Current
(1)
1.13
®
IOZ
Output TRI-STATE Current
VOUT = 0V, RL = 100Ω
450
mV
35
mV
1.38
V
35
mV
-3.5
-5
mA
±1
±10
μA
1.25
Power Down = 0V,
VOUT = 0V or V CC
TRANSMITTER SUPPLY CURRENT
ICCTW
ICCTG
ICCTZ
(1)
Transmitter Supply Current,
Worst Case
Transmitter Supply Current,
16 Grayscale
Transmitter Supply Current,
Power Down
RL = 100Ω,
CL = 5 pF,
Worst Case Pattern
(Figure 2 Figure 4 ) "Typ" values are
given for VCC = 3.6V and TA = +25°C,
"Max" values are given for VCC = 3.6V
and TA = -10°C
f = 25 MHz
31
45
mA
f = 40 MHz
37
50
mA
f = 65 MHz
48
60
mA
f = 87.5 MHz
55
65
mA
RL = 100Ω,
CL = 5 pF,
16 Grayscale Pattern
(Figure 3 Figure 4 ) "Typ" values are
given for VCC = 3.6V and TA = +25°C,
"Max" values are given for VCC = 3.6V
and TA = -10°C
f = 25 MHz
29
40
mA
f = 40 MHz
33
45
mA
f = 65 MHz
39
50
mA
f = 87.5 MHz
44
55
mA
17
150
μA
Power Down = Low
Driver Outputs in TRI-STATE® under Power Down Mode
VOS previously referred as VCM.
Recommended Transmitter Input Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified
Symbol
Parameter
Min
Typ
Max
Unit
6.0
ns
T
55.55
ns
0.5T
0.65T
ns
0.65T
ns
6.0
ns
TCIT
TxCLK IN Transition Time (Figure 6)
1.0
TCIP
TxCLK IN Period (Figure 7)
11.42
TCIH
TxCLK IN High Time (Figure 7)
0.35T
TCIL
TxCLK IN Low Time (Figure 7)
0.35T
0.5T
TXIT
TxIN , and PWR DOWN pin Transition Time
TXPD
Minimum pulse width for PWR DOWN pin signal
1.5
1
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Transmitter Switching Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified
Symbol
Parameter
Min
Typ
Max
Unit
LLHT
LVDS Low-to-High Transition Time (Figure 5)
0.75
1.4
ns
LHLT
LVDS High-to-Low Transition Time (Figure 5)
0.75
1.4
ns
TPPos0
Transmitter Output Pulse Position (Figure 13) (1)
-0.45
0
+0.45
ns
TPPos1
Transmitter Output Pulse Position
5.26
5.71
6.16
ns
TPPos2
Transmitter Output Pulse Position
10.98
11.43
11.88
ns
TPPos3
Transmitter Output Pulse Position
16.69
17.14
17.59
ns
TPPos4
Transmitter Output Pulse Position
22.41
22.86
23.31
ns
TPPos5
Transmitter Output Pulse Position
28.12
28.57
29.02
ns
TPPos6
Transmitter Output Pulse Position
33.84
34.29
34.74
ns
TPPos0
Transmitter Output Pulse Position (Figure 13) (1)
-0.25
0
+0.25
ns
TPPos1
Transmitter Output Pulse Position
3.32
3.57
3.82
ns
TPPos2
Transmitter Output Pulse Position
6.89
7.14
7.39
ns
TPPos3
Transmitter Output Pulse Position
10.46
10.71
10.96
ns
TPPos4
Transmitter Output Pulse Position
14.04
14.29
14.54
ns
TPPos5
Transmitter Output Pulse Position
17.61
17.86
18.11
ns
TPPos6
Transmitter Output Pulse Position
21.18
21.43
21.68
ns
TPPos0
Transmitter Output Pulse Position (Figure 13) (1)
-0.20
0
+0.20
ns
TPPos1
Transmitter Output Pulse Position
2.00
2.20
2.40
ns
TPPos2
Transmitter Output Pulse Position for Bit 2
4.20
4.40
4.60
ns
TPPos3
Transmitter Output Pulse Position for Bit 3
6.39
6.59
6.79
ns
TPPos4
Transmitter Output Pulse Position
8.59
8.79
8.99
ns
TPPos5
Transmitter Output Pulse Position
10.79
10.99
11.19
ns
TPPos6
Transmitter Output Pulse Position
12.99
13.19
13.39
ns
TPPos0
Transmitter Output Pulse Position (Figure 13) (1)
-0.20
0
+0.20
ns
TPPos1
Transmitter Output Pulse Position
1.48
1.68
1.88
ns
TPPos2
Transmitter Output Pulse Position
3.16
3.36
3.56
ns
TPPos3
Transmitter Output Pulse Position
4.84
5.04
5.24
ns
TPPos4
Transmitter Output Pulse Position
6.52
6.72
6.92
ns
TPPos5
Transmitter Output Pulse Position
8.20
8.40
8.60
ns
TPPos6
Transmitter Output Pulse Position
9.88
10.08
10.28
ns
TSTC
Required TxIN Setup to TxCLK IN
(Figure 7) at 85MHz
2.5
THTC
Required TxIN Hold to TxCLK IN (Figure 7) at 87.5 MHz
TCCD
TxCLK IN to TxCLK OUT Delay. Measure from TxCLK
IN edge to immediately crossing point of differential
TxCLK OUT by following the positive TxCLK OUT. 50%
duty cycle input clock is assumed. (Figure 8)
TA = -10°, and
87.5MHz for "Min",
TA = 70°, and
25MHz for "Max",
VCC = 3.6V, R_FB
pin = VCC
3.086
7.211
ns
Measure from TxCLK IN edge to immediately crossing
point of differential TxCLK OUT by following the positive
TxCLK OUT. 50% duty cycle input clock is assumed.
(Figure 9)
TA = -10°, and
87.5MHz for "Min",
TA = 70°, and
25MHz for "Max",
VCC = 3.6V, R_FB
pin = GND
2.868
6.062
ns
(1)
4
f = 25MHz
f = 40 MHz
f = 65 MHz
f = 87.5 MHz
ns
0.5
ns
The Minimum and Maximum Limits are based on statistical analysis of the device performance over process, voltage, and temperature
ranges. This parameter is functionality tested only on Automatic Test Equipment (ATE).
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Transmitter Switching Characteristics (continued)
Over recommended operating supply and temperature ranges unless otherwise specified
Symbol
SSCG
Parameter
Spread Spectrum Clock support; Modulation frequency
with a linear profile. (2)
Min
Typ
f = 25 MHz
100kHz
±2.5%/-5%
f = 40 MHz
100kHz
±2.5%/-5%
f = 65 MHz
100kHz
±2.5%/-5%
f = 87.5 MHz
100kHz
±2.5%/-5%
Max
Unit
TPLLS
Transmitter Phase Lock Loop Set (Figure 10)
10
ms
TPDD
Transmitter Power Down Delay (Figure 12)
100
ns
(2)
Care must be taken to ensure TSTC and THTC are met so input data are sampling correctly. This SSCG parameter only shows the
performance of tracking Spread Spectrum Clock applied to TxCLK IN pin, and reflects the result on TxCLKOUT+ and TxCLKOUT- pins.
AC Timing Diagrams
A.
The worst case test pattern produces a maximum toggling of digital circuits, LVDS I/O and LVCMOS/LVTTL I/O.
B.
Figure 2 and Figure 3 show a falling edge data strobe (TxCLK IN/RxCLK OUT).
Figure 2. “Worst Case" Test Pattern
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AC Timing Diagrams (continued)
A.
The 16 grayscale test pattern tests device power consumption for a “typical" LCD display pattern. The test pattern
approximates signal switching needed to produce groups of 16 vertical stripes across the display.
B.
Figure 2 and Figure 3 show a falling edge data strobe (TxCLK IN/RxCLK OUT).
C.
Recommended pin to signal mapping. Customer may choose to define differently.
Figure 3. “16 Grayscale" Test Pattern - DS90C385A
Figure 4. DS90C385A (Transmitter) LVDS Output Load. 5pF is showed as board loading
Figure 5. DS90C385A (Transmitter) LVDS Transition Times
Figure 6. DS90C385A (Transmitter) Input Clock Transition Time
6
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AC Timing Diagrams (continued)
Figure 7. DS90C385A (Transmitter) Setup/Hold and High/Low Times with R_FB pin = GND (Falling Edge
Strobe)
Figure 8. DS90C385A (Transmitter) Clock In to Clock Out Delay with R_FB pin = VCC
Figure 9. DS90C385A (Transmitter) Clock In to Clock Out Delay with R_FB pin = GND
Figure 10. DS90C385A (Transmitter) Phase Lock Loop Set Time
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AC Timing Diagrams (continued)
Figure 11. 28 Parallel TTL Data Inputs Mapped to LVDS Outputs - DS90C385A
Figure 12. Transmitter Power Down Delay
Figure 13. Transmitter LVDS Output Pulse Position Measurement - DS90C385A
8
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DS90C385A DGG (TSSOP) Package Pin Descriptions — FPD Link Transmitter
Pin Name
I/O
No.
Description
TxIN
I
28
LVTTL level input. This includes: 8 Red, 8 Green, 8 Blue, and 4 control lines—FPLINE, FPFRAME
and DRDY (also referred to as HSYNC, VSYNC, Data Enable).
TxOUT+
O
4
Positive LVDS differentiaI data output.
TxOUT-
O
4
Negative LVDS differential data output.
TxCLKIN
I
1
LVTTL Ievel clock input. Pin name TxCLK IN.
R_FB
I
1
LVTTL Ievel programmable strobe select (See Table 1).
TxCLK OUT+
O
1
Positive LVDS differential clock output.
TxCLK OUT-
O
1
Negative LVDS differential clock output.
PWR DOWN
I
1
LVTTL level input. When asserted (low input) TRI-STATE the outputs, ensuring low current at power
down.
VCC
I
3
Power supply pins for LVTTL inputs.
GND
I
5
Ground pins for LVTTL inputs.
PLL VCC
I
1
Power supply pin for PLL.
PLL GND
I
2
Ground pins for PLL.
LVDS VCC
I
1
Power supply pin for LVDS outputs.
LVDS GND
I
3
Ground pins for LVDS outputs.
Pin Diagram for TSSOP Package
Top View
Order Number DS90C385AMT
DGG Package
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APPLICATION INFORMATION
The DS90C385A is backward compatible with the DS90C385, DS90C383A, DS90C383 in TSSOP 56-lead
package, and it is a pin-for-pin replacements.
This device DS90C385A also features reduced variation of the TCCD parameter which is important for dual pixel
applications. (See AN-1084)
This device may also be used as a replacement for the DS90CF583 (5V, 65MHz) and DS90CF581 (5V, 40MHz)
FPD-Link Transmitters with certain considerations/modifications:
1. Change 5V power supply to 3.3V. Provide this 3.3V supply to the VCC, LVDS VCC and PLL VCC of the
transmitter.
2. The DS90C385A transmitter input and control inputs accept 3.3V LVTTL/LVCMOS levels. They are not 5V
tolerant.
3. To implement a falling edge device for the DS90C385A, the R_FB pin may be tied to ground OR left
unconnected (an internal pull-down resistor biases this pin low). Biasing this pin to Vcc implements a rising
edge device.
TRANSMITTER INPUT PINS
The TxIN and control input pins are compatible with LVCMOS and LVTTL levels. These pins are not 5V tolerant.
TRANSMITTER INPUT CLOCK/DATA SEQUENCING
Unlike the DS90C385, DS90C(F)383A/363A, the DS90C385A does not require any special requirement for
sequencing of the input clock/data and PD (PowerDown) signal. The DS90C385A offers a more robust input
sequencing feature where the input clock/data can be inserted after the release of the PD signal. In the case
where the clock/data is stopped and reapplied, such as changing video mode within Graphics Controller, it is not
necessary to cycle the PD signal. However, there are in certain cases where the PD may need to be asserted
during these mode changes. In cases where the source (Graphics Source) may be supplying an unstable clock
or spurious noisy clock output to the LVDS transmitter, the LVDS Transmitter may attempt to lock onto this
unstable clock signal but is unable to do so due the instability or quality of the clock source. The PD signal in
these cases should then be asserted once a stable clock is applied to the LVDS transmitter. Asserting the PWR
DOWN pin will effectively place the device in reset and disable the PLL, enabling the LVDS Transmitter into a
power saving standby mode. However, it is still generally a good practice to assert the PWR DOWN pin or reset
the LVDS transmitter whenever the clock/data is stopped and reapplied but it is not mandatory for the
DS90C385A.
SPREAD SPECTRUM CLOCK SUPPORT
The DS90C385A can support Spread Spectrum Clocking signal type inputs. The DS90C385A outputs will
accurately track Spread Spectrum Clock/Data inputs with modulation frequencies of up to 100kHz (max.)with
either center spread of ±2.5% or down spread -5% deviations.
POWER SOURCES SEQUENCE
In typical applications, it is recommended to have VCC, LVDS VCC and PLL VCC from the same power source with
three separate de-coupling bypass capacitor groups. There is no requirement on which VCC entering the device
first.
Typical Application
Figure 14. Typical Application
10
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Table 1. Truth Table – Programmable Transmitter
(DS90C385A)
Pin
Condition
Strobe Status
R_FB
R_FB = VCC
Rising edge strobe
R_FB
R_FB = GND or NC
Falling edge strobe
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REVISION HISTORY
Changes from Revision J (April 2013) to Revision K
•
12
Page
Changed layout of National Data Sheet to TI format .......................................................................................................... 11
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PACKAGE OPTION ADDENDUM
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17-Apr-2013
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
(2)
MSL Peak Temp
Op Temp (°C)
Top-Side Markings
(3)
(4)
DS90C385AMT/NOPB
ACTIVE
TSSOP
DGG
56
34
Green (RoHS
& no Sb/Br)
CU SN
Level-2-260C-1 YEAR
-10 to 70
DS90C385AMT
DS90C385AMTX
ACTIVE
TSSOP
DGG
56
1000
TBD
Call TI
Call TI
-10 to 70
DS90C385AMT
DS90C385AMTX/NOPB
ACTIVE
TSSOP
DGG
56
1000
Green (RoHS
& no Sb/Br)
CU SN
Level-2-260C-1 YEAR
-10 to 70
DS90C385AMT
(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 - 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)
Multiple Top-Side Markings will be inside parentheses. Only one Top-Side 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 Top-Side 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.
Addendum-Page 1
Samples
PACKAGE MATERIALS INFORMATION
www.ti.com
24-Apr-2013
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
DS90C385AMTX
TSSOP
DGG
56
1000
330.0
24.4
8.6
14.5
1.8
12.0
24.0
Q1
DS90C385AMTX/NOPB
TSSOP
DGG
56
1000
330.0
24.4
8.6
14.5
1.8
12.0
24.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
24-Apr-2013
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
DS90C385AMTX
TSSOP
DGG
56
1000
367.0
367.0
45.0
DS90C385AMTX/NOPB
TSSOP
DGG
56
1000
367.0
367.0
45.0
Pack Materials-Page 2
MECHANICAL DATA
MTSS003D – JANUARY 1995 – REVISED JANUARY 1998
DGG (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
48 PINS SHOWN
0,27
0,17
0,50
48
0,08 M
25
6,20
6,00
8,30
7,90
0,15 NOM
Gage Plane
1
0,25
24
0°– 8°
A
0,75
0,50
Seating Plane
0,15
0,05
1,20 MAX
PINS **
0,10
48
56
64
A MAX
12,60
14,10
17,10
A MIN
12,40
13,90
16,90
DIM
4040078 / F 12/97
NOTES: A.
B.
C.
D.
All linear dimensions are in millimeters.
This drawing is subject to change without notice.
Body dimensions do not include mold protrusion not to exceed 0,15.
Falls within JEDEC MO-153
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