Features IEEE 1149.1 (JTAG) Compliant and At-Speed BIST test mode. Clock recovery from PLL lock to random data patterns. Guaranteed transition every data transfer cycle Chipset (Tx + Rx) power consumption < 500 mW (typ) @ 66 MHz Single differential pair eliminates multi-channel skew Flow-through pinout for easy PCB layout 660 Mbps serial Bus LVDS data rate (at 66 MHz clock) 10-bit parallel interface for 1 byte data plus 2 control bits Synchronization mode and LOCK indicator Programmable edge trigger on clock High impedance on receiver inputs when power is off Bus LVDS serial output rated for 27 load Small 49-lead BGA package Description The SCAN921023 transforms a 10-bit wide parallel LVCMOS/LVTTL data bus into a single high speed Bus LVDS serial data stream with embedded clock. The SCAN921224 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 Test Access Port and Boundary Scan Architecture with the incorporation of the defined boundary-scan test logic and test access port consisting of Test Data Input (TDI), Test Data Out (TDO), Test Mode Select (TMS), Test Clock (TCK), and the optional Test Reset (TRST#). IEEE 1149.1 features provide the designer or test engineer access to the backplane or cable interconnects and the ability to verify differential signal integrity to enhance their system test strategy. The pair of devices also features an at-speed BIST mode which allows the interconnects between the Serializer and Deserializer to be verified at-speed. The SCAN921023 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 embedded 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 SCAN921023 output pins into TRI-STATE to achieve a high impedance state. The PLL can lock to frequencies between 20 MHz and 66 MHz.

Also Recommended SCAN921226▲ 30- 80 Mhz Operating Range SCAN921260▲ Integrates Six Scan921224S Into A Single Chip 20-66 Mhz

	Block Diagram click for larger image

Datasheets

Title		Size	Date	Other Language
	SCAN921224 20 MHz-66MHz 10-Bit Deserializer with IEEE 1149.1 Test Access	944 Kbytes	19-Nov-04

Application Notes

Title		Size	Date	Other Language
	AN-1909: Application Note 1909 DS15BA101 and DS15EA101 Enable Long Reach Applications for Embedded Clock SER/DES	360 Kbytes	2-Mar-09	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
SCAN921224SLC/NOPB SCAN921224SLC RoHS Status	FBGA	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 330 DIGI-KEY Worldwide 311	$4.80 each at 1K+ pcs	tray of 416

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
SCAN921224SLCX	NONE	NATIONAL SEMICONDUCTOR	05 Mar 2008

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for SCAN921224.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for SCAN921224 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
SCAN921224SLC/NOPB SCAN921224SLC	120.419 122.75	FBGA	49	4 3	260 235	Detail	Download	ibis file	NSUZXYTTE# SCAN921224 SLC

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for SCAN921224.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for SCAN921224 is located at RoHS Status.

CAD Symbols and Models Download SCAN921224 CAD Symbols

Models ibis file

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
SCAN921224SLC	CMOS8	1	13725	73	0	1774500	2	503519220

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for SCAN921224.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for SCAN921224 is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
SCAN921224SLCX	NONE	NATIONAL SEMICONDUCTOR	05 Mar 2008