SCAN921821 [TI]
具有预加重功能、IEEE 1149.1 (JTAG) 和全速度 BIST 的双路 18 位串行器;型号: | SCAN921821 |
厂家: | TEXAS INSTRUMENTS |
描述: | 具有预加重功能、IEEE 1149.1 (JTAG) 和全速度 BIST 的双路 18 位串行器 |
文件: | 总16页 (文件大小:1139K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
SCAN921821
www.ti.com
SNLS173C –SEPTEMBER 2004–REVISED APRIL 2013
SCAN921821 Dual 18-Bit Serializer with Pre-emphasis, IEEE 1149.1 (JTAG), and At-Speed
BIST
Check for Samples: SCAN921821
1
FEATURES
DESCRIPTION
The SCAN921821 is a dual channel 18-bit serializer
featuring signal conditioning, boundary SCAN, and at-
speed BIST. Each serializer block transforms an 18-
bit parallel LVCMOS/LVTTL data bus into a single
Bus LVDS data stream with embedded clock. This
single serial data stream with embedded clock
simplifies PCB design and reduces PCB cost by
narrowing data paths that in turn reduce PCB size
and layers. The single serial data stream also
reduces cable size, the number of connectors, and
eliminates clock-to-data and data-to-data skew.
2
•
15-66 MHz Dual 18:1 Serializer with 2.376 Gbps
Total Throughput
•
•
•
8-level Selectable Pre-emphasis on Each
Channel Drives Lossy Cables and Backplanes
>15kV HBM ESD Protection on Bus LVDS I/O
Pins
Robust BLVDS Serial Data Transmission with
Embedded Clock for Exceptional Noise
Immunity and Low EMI
•
•
•
•
•
Power Saving Control Pin for Each Channel
IEEE 1149.1 "JTAG" Compliant
Each channel also has an 8-level selectable pre-
emphasis
feature
that
significantly
extends
performance over lossy interconnect. Each channel
also has its own powerdown pin that saves power by
reducing supply current when the channel is not
being used.
At-Speed BIST - PRBS Generation
No External Coding Required
Internal PLL, No External PLL Components
Required
The SCAN921821 also incorporates advanced
testability features including IEEE 1149.1 and at-
speed BIST PRBS pattern generation to facilitate
verification of board and link integrity
•
•
Single +3.3V Power Supply
Low Power: 260 mW (typ) Per Channel at 66
MHz with PRBS-15 Pattern
•
•
Single 3.3 V Supply
Fabricated with Advanced CMOS Process
Technology
•
•
Industrial −40 to +85°C Temperature Range
Compact 100-ball NFBGA Package
1
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.
2
All 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
SCAN921821
SNLS173C –SEPTEMBER 2004–REVISED APRIL 2013
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Block Diagram
3
PEMA
18
DOUTAP
DOUTAN
DINA
PWDNA
SYNCA
ENA
3
PEMB
18
DOUTBP
DOUTBN
DINB
PWDNB
SYNCB
ENB
Timing
and
Control
TxCLK
TRST
PLL
BISTA
BISTB
IEEE 1149.1
Test Access Port
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.
(1)(2)
Absolute Maximum Ratings
Supply Voltage (VDD
)
−0.3V to +4V
< 30 V/ms
−0.3V to (VDD +0.3V)
−0.3V to (VDD +0.3V)
−0.3V to +3.9V
10ms
Supply Voltage (VDD) Ramp Rate
LVCMOS/LVTTL Input Voltage
LVCMOS/LVTTL Output Voltage
Bus LVDS Driver Output Voltage
Bus LVDS Output Short Circuit Duration
Junction Temperature
+150°C
Storage Temperature
−65°C to +150°C
+220°C
Lead Temperature (Soldering, 4 seconds)
Maximum Package Power Dissipation at 25°C
NFBGA-100
Derating Above 25°C
θJA
3.57 W
28.57 mW/°C
35°C/W
Thermal resistance
θJC
11.1°C/W
ESD Rating
HBM, 1.5 KΩ, 100 pF
All pins
>8 kV
Bus LVDS pins
>15 kV
MM, 0Ω, 200 pF
>1200 V
CDM
>2 kV
(1) “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be specified. They are not meant to imply
that the devices should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation.
(2) If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.
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SNLS173C –SEPTEMBER 2004–REVISED APRIL 2013
Recommended Operating Conditions
Min
3.15
−40
15
Nom
3.3
Max
3.45
+85
66
Units
V
Supply Voltage (VDD
)
Operating Free Air Temperature (TA)
Clock Rate
+25
°C
MHz
mV p-p
Supply Noise
100
DC Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.(1)(2)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
LVCMOS/LVTTL Input DC Specifications
High Level Input
VIH
2.0
VDD
0.8
V
Voltage
Low Level Input
VIL
GND
−1.5
−20
V
V
Voltage
VCL
IINH
Input Clamp Voltage
ICL = −18 mA
-0.7
±2
High Level Input
Current
VIN = VDD = VDDMAX
+20
+10
μA
Low Level Output
Current
IINL
VIN = VSS, VDD = VDDMAX
−10
±2
μA
1149.1 (JTAG) DC Specifications
High Level Input
VIH
2.0
VDD
0.8
V
Voltage
Low Level Input
VIL
GND
−1.5
-20
V
V
Voltage
VCL
IINH
Input Clamp Voltage
ICL = −18 mA
-0.7
High Level Input
Current
VIN = VDD = VDDMAX
+20
+200
VDD
0.5
μA
Low Level Output
Current
IINL
VOH
VOL
IOS
VIN = VSS, VDD = VDDMAX
IOH = −9 mA
-200
2.3
μA
mV
mV
mA
High Level Output
Voltage
Low Level Output
Voltage
IOL = 9 mA
GND
-100
Output Short Circuit
Current
VOUT = 0 V
-80
-50
PWDN or EN = 0.8V, VOUT = 0 V
PWDN or EN = 0.8V, VOUT = VDD
-10
-30
+10
+30
μA
μA
Output Tri-state
Current
IOZ
Bus LVDS Output DC Specifications
Output Differential
VOD
See Figure 10, RL = 100Ω
450
500
550
mV
Voltage (DO+) - (DO-)
Output Differential
ΔVOD
2
15
1.25
15
mV
V
Voltage Unbalance
VOS
Offset Voltage
1.05
1.2
2.7
Offset Voltage
Unbalance
ΔVOS
mV
(1) Typical values are given for VCC = 3.3V and TA = +25°C.
(2) Current into device pins is defined as positive. Current out of device pins is defined as negative. Voltages are referenced to ground
except VOD, ΔVOD, VTH and VTL which are differential voltages.
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Units
DC Electrical Characteristics (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.(1)(2)
Symbol
Parameter
Conditions
Min
1.10
1.35
1.55
1.80
1.95
2.10
2.15
Typ
1.24
1.47
1.70
1.91
2.08
2.21
2.30
Max
1.35
1.55
1.80
1.95
2.20
2.35
2.50
Pre-Emphasis Level = 1
Pre-Emphasis Level = 2
Pre-Emphasis Level = 3
Pre-Emphasis Level = 4
Pre-Emphasis Level = 5
Pre-Emphasis Level = 6
Pre-Emphasis Level = 7
Pre-Emphasis Output
Voltage Ratio
QPOV
| VODPRE / VOD
|
Output Short Circuit
Current
IOS
IOZ
DO = 0V, Din = H, PWDN and EN = 2.4V
-10
-25
-75
mA
(3)
PWDN or EN = 0.8V, DO = 0V
-10
-55
± 1
± 6
+10
+55
µA
µA
TRI-STATE Output
Current
(3)
PWDN or EN = 0.8V, DO = VDD
Power Supply Current (DVDD, PVDD and AVDD Pins)
f = 66 MHz, PRBS-15
Pattern
160
180
240
280
1.0
225
mA
mA
mA
mA
mA
Total Supply Current
(includes load current)
CL = 15pF,
RL = 100 Ω
IDD
f = 66 MHz, Worst Case
Pattern (Checker-Board
Pattern)
f = 66 MHz, PRBS-15
Pattern
Total Supply Current
with Pre-Emphasis
(includes load current)
CL = 15pF,
RL = 100 Ω
IDDP
f = 66 MHz, Worst Case
Pattern (Checker-Board
Pattern)
325
3.0
Supply Current
Powerdown
IDDX
PWDN = 0.8V, EN = 0.8V
(3) IOZ is measured at each pin. The DOUT pin not under test is floated to isolate the TRI-STATE current flow.
Timing Requirements for TCLK
Over recommended operating supply and temperature ranges unless otherwise specified.(1)(2)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
tTCP
Transmit Clock Period
15.2
T
66.7
ns
Transmit Clock High
Time
tTCIH
tTCIL
tCLKT
tJIT
0.4T
0.4T
0.5T
0.5T
3
0.6T
0.6T
ns
ns
Transmit Clock Low
Time
TCLK Input Transition
Time
6
ns
(3)
TCLK Input Jitter
See
80
ps (RMS)
(1) Typical values are given for VCC = 3.3V and TA = +25°C.
(2) Current into device pins is defined as positive. Current out of device pins is defined as negative. Voltages are referenced to ground
except VOD, ΔVOD, VTH and VTL which are differential voltages.
(3) Specified by design using statistical analysis.
4
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SNLS173C –SEPTEMBER 2004–REVISED APRIL 2013
AC Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.(1)(2)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Serializer AC Specifications
Bus LVDS Low-to-High
(3)
tLLHT
tLHLT
tDIS
0.3
0.3
0.4
0.4
ns
ns
ns
ns
ns
ns
ns
ns
ns
See Figure 2,
RL = 100Ω,
Transition Time
Bus LVDS High-to-Low
Transition Time
CL=10pF to GND
DIN (0-17) Setup to
TCLK
(3)
1.9
0.6
See Figure 4,
RL = 100Ω,
DIN (0-17) Hold from
TCLK
CL=10pF to GND
tDIH
DO ± HIGH to
TRI-STATE Delay
tHZD
tLZD
tZHD
tZLD
tSPW
3.9
3.5
3.2
2.4
10
10
DO ± LOW to TRI-
STATE Delay
See Figure 5
RL = 100Ω,
CL=10pF to GND
DO ± TRI-STATE to
HIGH Delay
10
DO ± TRI-STATE to
LOW Delay
10
See Figure 7,
SYNC Pulse Width
5*tTCP
6*tTCP
1024*tTCP
RL = 100Ω
Serializer PLL Lock
Time
See Figure 6,
tPLD
tSD
510*tTCP
ns
ns
ps
RL = 100Ω
Serializer Delay
See Figure 8 , RL = 100Ω
tTCP + 2.5 tTCP + 4.5 tTCP + 6.5
70
Channel to Channel
Skew
tSKCC
Room Temperature, VDD = 3.3V,
66 MHz
ps
(RMS)
tRJIT
tDJIT
Random Jitter
6.1
15 MHz
66 MHz
-390
-60
320
30
ps
ps
Deterministic Jitter
(3)
Figure 9,
1149.1 (JTAG) AC Specifications
Maximum TCK Clock
fMAX
25
2.4
2.8
MHz
ns
Frequency
TDI or TMS Setup to
tS
TCK, H or L
TDI or TMS Hold from
tH
ns
CL = 15pF,
RL = 500 Ω
TCK, H or L
TCK Pulse Width, H or
tW1
10
10
2
ns
ns
ns
L
tW2
TRST Pulse Width, L
Recovery Time, TRST
to TCK
tREC
(1) Typical values are given for VCC = 3.3V and TA = +25°C.
(2) Current into device pins is defined as positive. Current out of device pins is defined as negative. Voltages are referenced to ground
except VOD, ΔVOD, VTH and VTL which are differential voltages.
(3) Specified by design using statistical analysis.
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AC Timing Diagrams and Test Circuits
Figure 1. “Worst Case” Serializer IDD Test Pattern
Figure 2. Serializer Bus LVDS Distributed Output Load and Transition Times
Figure 3. Serializer Input Clock Transition Time
Figure 4. Serializer Setup/Hold Times
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SNLS173C –SEPTEMBER 2004–REVISED APRIL 2013
Figure 5. Serializer TRI-STATE Test Circuit and Timing
Figure 6. Serializer PLL Lock Time, and PWRDN TRI-STATE Delays
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Figure 7. SYNC Timing Delay
Figure 8. Serializer Delay
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SNLS173C –SEPTEMBER 2004–REVISED APRIL 2013
Figure 9. Deterministic Jitter and Ideal Bit Position
VOD = (DO+)–(DO−).
Differential output signal is shown as (DO+)–(DO−), device in Data Transfer mode.
Figure 10. VOD Diagram
Pre-emphasis Truth Table
PEM LEVEL
PEM2
PEM1
PEM0
0
1
2
3
4
5
6
7
L
L
L
L
L
H
L
L
H
H
L
L
H
L
H
H
H
H
L
H
L
H
H
H
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Pin Diagram
Figure 11. SCAN921821TVV
Top View
A1
A2
A3
A4
AV
A5
A6
AV
A7
A8
A9
AV
A10
BISTB
DOUTBN
ENB
DOUTAN
DOUTAP
ENA
PV
SS
DD
DD
DD
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
DINB16
SYNCB
DOUTBP
PEMB1
PEMB0
PEMA1
BISTA
AV
DD
AV
AV
DD
SS
DD
SS
DD
SS
C1
C2
C3
DV
C4
C5
C6
C7
C8
C9
C10
DINB14
PEMA2
SYNCA
DINA16
DV
AV
AV
AV
SS
AV
DD
SS
SS
DD
SS
SS
SS
SS
D1
D2
D3
D4
DV
D5
D6
D7
D8
D9
D10
DINB13
DINB12
DINB17
PEMA0
DINA17
DINA15
DINA13
PV
AV
E1
E2
E3
E4
DV
E5
E6
E7
DV
E8
E9
E10
DINB11
DINB9
DINB15
DINB8
PEMB2
DINA14
DINA12
DINA9
SS
SS
F1
F2
F3
F4
DV
F5
F6
F7
F8
F9
F10
DINB10
DINB7
DINB5
DINA11
DINA4
DINA10
DINA8
PV
DV
DD
DD
G1
G2
G3
G4
DV
G5
G6
G7
G8
G9
G10
DINB6
DINB4
DINB2
DINA1
DINA2
DINA7
DINA6
DV
DV
DD
DD
SS
DD
H1
H2
H3
H4
DV
H5
H6
H7
H8
H9
H10
DINB3
DINB1
TxCLK
TCK
DINA0
DINA5
PV
PV
DV
SS
SS
DD
SS
J1
J2
J3
J4
J5
J6
J7
J8
J9
J10
DINB0
PWDNA
TRST
NC
DINA3
DV
PV
PV
PV
DV
DD
DD
DD
K1
K2
K3
TMS
K4
K5
K6
K7
K8
K9
PWDNB
K10
TDI
TDO
DV
DV
SS
DV
PV
PV
SS
DV
DD
SS
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SNLS173C –SEPTEMBER 2004–REVISED APRIL 2013
Pin Descriptions
Pin Name
DATA PINS
DINA0-17
DINB0-17
DOUTAP
DOUTAN
DOUTBP
DOUTAN
Pin Count
I/O, Type
Description
18
18
1
Transmitter inputs. There is a pull-down circuitry on each of these pins which are active
if respective PWDNA or PWDNB pin is pulled high.
I, LVCMOS
1
O,BLVDS
Inverting and non-inverting differential transmitter outputs.
1
1
TIMING AND CONTROL PINS
Transmitter reference clock. Used to strobe data at the inputs and to drive the
transmitter PLL. There is a pull-up circuitry on this pin which is always active.
TxCLK
1
I, LVCMOS
I, LVCMOS
ENA
1
1
1
1
1
Transmitter outputs enable pins. There is a pull-down circuitry on each of these pins that
are active if corresponding PWDNA or PWDNB pin is pulled high. When these pins are
set to LOW, the transmitter outputs will be disabled. The PLL will remain locked.
ENB
PWDNA
PWDNB
SYNCA
Stand-by mode pins. There is a pull-down circuitry on each of these pins that are always
active. When these pins are set to LOW, the transmitter will be put in low power mode
and the PLL will lose lock.
I, LVCMOS
I, LVCMOS
Transmitter synchronization pins. There is a pull-down circuitry on each of these pins
that are active if corresponding PWDNA or PWDNB pin is pulled high. When these pins
are set to HIGH, the transmitter will ignore incoming data and send SYNC patterns to
provide a locking reference to receiver(s).
SYNCB
1
PRE-EMPHASIS PINS
PEMA0-2
3
3
8-level pre-emphasis selection pins. There is a pull-down circuitry on each of these pins
which are active if corresponding PWDNA or PWDNB pin is pulled high.
I, LVCMOS
I, LVCMOS
PEMB0-2
JTAG PINS
Test Data Input to support IEEE 1149.1. There is a pull-up circuitry on this pin which is
always active.
TDI
1
1
1
1
1
TDO
TMS
TCK
TRST
O, LVCMOS Test Data Output to support IEEE 1149.1.
Test Mode Select Input to support IEEE 1149.1. There is a pull-up circuitry on this pin
which is always active.
I, LVCMOS
I, LVCMOS
I, LVCMOS
Test Clock Input to support IEEE 1149.1. There is no failsafe circuitry on this pin.
Test Reset Input to support IEEE 1149.1. There is a pull-up circuitry on this pin which is
always active.
BIST PINS
BISTA
1
1
BIST selection pins. These pins select which transmitter will generate a PRBS like data.
There is a pull-down circuitry on these pins which are active if corresponding PWDNA or
PWDNB pin is pulled high.
I, LVCMOS
BISTB
POWER PINS
AVDD
6
8
I, POWER
I, POWER
I, POWER
I, POWER
I, POWER
I, POWER
Power Supply for the LVDS circuitry.
DVDD
Power Supply for the digital circuitry.
PVDD
5
Power Supply for the PLL and BG circuitry.
Ground reference for the LVDS circuitry.
Ground reference for the digital circuitry.
Ground reference for the PLL and BG circuitry.
AVSS
5
DVSS
10
5
PVSS
OTHER PINS
NC
1
N/A
Not connected.
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REVISION HISTORY
Changes from Revision B (April 2013) to Revision C
Page
•
Changed layout of National Data Sheet to TI format .......................................................................................................... 11
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PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status Package Type Package Pins Package
Eco Plan
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
Samples
Drawing
Qty
(1)
(2)
(3)
(4/5)
(6)
SCAN921821TSM/NOPB
ACTIVE
NFBGA
NZD
100
240
RoHS & Green
SNAGCU
Level-4-260C-72 HR
-40 to 85
SCAN921821
TSM
(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) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(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.
(6)
Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two
lines if the finish value exceeds the maximum column width.
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
PACKAGE MATERIALS INFORMATION
www.ti.com
23-Jun-2023
TRAY
L - Outer tray length without tabs
KO -
Outer
tray
height
W -
Outer
tray
width
Text
P1 - Tray unit pocket pitch
CW - Measurement for tray edge (Y direction) to corner pocket center
CL - Measurement for tray edge (X direction) to corner pocket center
Chamfer on Tray corner indicates Pin 1 orientation of packed units.
*All dimensions are nominal
Device
Package Package Pins SPQ Unit array
Max
matrix temperature
(°C)
L (mm)
W
K0
P1
CL
CW
Name
Type
(mm) (µm) (mm) (mm) (mm)
SCAN921821TSM/
NOPB
NZD
NFBGA
100
240
10 X 24
150
322.6 135.9 7620 12.4
14.9 12.15
Pack Materials-Page 1
MECHANICAL DATA
NZD0100A
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