SCAN921025SLC Datasheet PDF - National Semiconductor
| Part Number | SCAN921025SLC | |
| Description | 30-80 MHz 10 Bit Bus LVDS Serializer and Deserializer with IEEE 1149.1 (JTAG) and at-speed BIST | |
| Manufacturers | National Semiconductor | |
| Logo |  |
|
|
There is a preview and SCAN921025SLC download ( pdf file ) link at the bottom of this page. Total 21 Pages | ||
Preview 1 page No Preview Available !
December 2001
SCAN921025 and SCAN921226
30-80 MHz 10 Bit Bus LVDS Serializer and Deserializer
with IEEE 1149.1 (JTAG) and at-speed BIST
General Description
The SCAN921025 transforms a 10-bit wide parallel
LVCMOS/LVTTL data bus into a single high speed Bus
LVDS serial data stream with embedded clock. The
SCAN921226 receives the Bus LVDS serial data stream and
transforms it back into a 10-bit wide parallel data bus and
recovers parallel clock.
Both devices are compliant with IEEE 1149.1 Standard for
Boundary Scan Test. IEEE 1149.1 features provide the de-
sign or test engineer access via a standard Test Access Port
(TAP) to the backplane or cable interconnects and the ability
to verify differential signal integrity. The pair of devices also
features an at-speed BIST mode which allows the intercon-
nects between the Serializer and Deserializer to be verified
at-speed.
The SCAN921025 transmits data over backplanes or cable.
The single differential pair data path makes PCB design
easier. In addition, the reduced cable, PCB trace count, and
connector size tremendously reduce cost. Since one output
transmits clock and data bits serially, it eliminates clock-to-
data and data-to-data skew. The powerdown pin saves
power by reducing supply current when not using either
device. Upon power up of the Serializer, you can choose to
activate synchronization mode or allow the Deserializer to
use the synchronization-to-random-data feature. By using
the synchronization mode, the Deserializer will establish lock
to a signal within specified lock times. In addition, the em-
bedded clock guarantees a transition on the bus every 12-bit
cycle. This eliminates transmission errors due to charged
cable conditions. Furthermore, you may put the
SCAN921025 output pins into TRI-STATE to achieve a high
impedance state. The PLL can lock to frequencies between
30 MHz and 80 MHz.
Features
n IEEE 1149.1 (JTAG) Compliant and At-Speed BIST test
mode.
n Clock recovery from PLL lock to random data patterns.
n Guaranteed transition every data transfer cycle
n Chipset (Tx + Rx) power consumption < 600 mW (typ)
@ 80 MHz
n Single differential pair eliminates multi-channel skew
n 800 Mbps serial Bus LVDS data rate (at 80 MHz clock)
n 10-bit parallel interface for 1 byte data plus 2 control bits
n Synchronization mode and LOCK indicator
n Programmable edge trigger on clock
n High impedance on receiver inputs when power is off
n Bus LVDS serial output rated for 27Ω load
n Small 49-lead BGA package
Block Diagrams
© 2001 National Semiconductor Corporation DS200248
DS200248-1
www.national.com
|
| |
 
Absolute Maximum Ratings (Note 1)
Supply Voltage (VCC)
LVCMOS/LVTTL Input
Voltage
LVCMOS/LVTTL Output
Voltage
Bus LVDS Receiver Input
Voltage
−0.3V to +4V
−0.3V to (VCC +0.3V)
−0.3V to (VCC +0.3V)
−0.3V to +3.9V
Bus LVDS Driver Output
Voltage
−0.3V to +3.9V
Bus LVDS Output Short
Circuit Duration
10mS
Junction Temperature
+150˚C
Storage Temperature
−65˚C to +150˚C
Lead Temperature
(Soldering, 4 seconds)
+220˚C
Maximum Package Power Dissipation Capacity
@ 25˚C Package:
49L BGA
1.47 W
Package Derating:
49L BGA
θja
ESD Rating
HBM
MM
11.8 mW/˚C above
+25˚C
85˚C/W
>2kV
> 250V
Recommended Operating
Conditions
Supply Voltage (VCC)
Operating Free Air
Temperature (TA)
Receiver Input Range
Supply Noise Voltage
(VCC)
Min Nom Max Units
3.0 3.3 3.6 V
−40 +25 +85 ˚C
0 2.4 V
100 mVP-P
Electrical Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol
Parameter
Conditions
Min Typ Max Units
SERIALIZER LVCMOS/LVTTL DC SPECIFICATIONS (apply to DIN0-9, TCLK, PWRDN, TCLK_R/F, SYNC1, SYNC2, DEN)
VIH High Level Input Voltage
2.0
VCC
V
VIL Low Level Input Voltage
GND
0.8 V
VCL Input Clamp Voltage
ICL = −18 mA
-0.86 −1.5
V
IIN Input Current
VIN = 0V or 3.6V
−10 ±1 +10 µA
DESERIALIZER LVCMOS/LVTTL DC SPECIFICATIONS (apply to pins PWRDN, RCLK_R/ F, REN, REFCLK = inputs; apply to
pins ROUT, RCLK, LOCK = outputs)
VIH High Level Input Voltage
VIL Low Level Input Voltage
VCL Input Clamp Voltage
ICL = −18 mA
IIN Input Current
VIN = 0V or 3.6V
VOH
High Level Output Voltage
IOH = −9 mA
VOL
Low Level Output Voltage
IOL = 9 mA
IOS Output Short Circuit Current VOUT = 0V
IOS Output Short Circuit Current,
TDO output
IOZ TRI-STATE Output Current PWRDN or REN = 0.8V, VOUT = 0V or VCC
SERIALIZER Bus LVDS DC SPECIFICATIONS (apply to pins DO+ and DO−)
2.0
GND
−10
2.2
GND
−15
-15
−0.62
±1
3.0
0.25
−47
-70
VCC
0.8
−1.5
+15
VCC
0.5
−85
-100
−10 ±0.1 +10
V
V
V
µA
V
V
mA
mA
µA
VOD Output Differential Voltage RL = 27Ω, Figure 17
(DO+)–(DO−)
200 290
mV
∆VOD
Output Differential Voltage
Unbalance
35 mV
VOS
∆VOS
IOS
IOZ
IOX
Offset Voltage
Offset Voltage Unbalance
Output Short Circuit Current
TRI-STATE Output Current
Power-Off Output Current
D0 = 0V, DIN = High,PWRDN and DEN = 2.4V
PWRDN or DEN = 0.8V, DO = 0V or VCC
VCC = 0V, DO=0V or 3.6V
1.05 1.1 1.3
V
4.8 35 mV
−56 −90 mA
−10 ±1 +10 µA
−20 ±1 +25 µA
5 www.national.com
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for SCAN921025SLC electronic component. |
| Information | Total 21 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ SCAN921025SLC.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| SCAN921025SLC | The function is 30-80 MHz 10 Bit Bus LVDS Serializer and Deserializer with IEEE 1149.1 (JTAG) and at-speed BIST. National Semiconductor | |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
SCAN
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||