Features True IEEE 1149.1 hierarchical and multidrop addressable capability The 8 address inputs support up to 249 unique slot addresses, an Interrogation Address, Broadcast Address, and 4 Multi-cast Group Addresses (address 000000 is reserved) 7 IEEE 1149.1-compatible configurable local scan ports Bi-directional Backplane and LSP0 ports are interchangeable slave ports Capable of ignoring TRST# of the backplane port when it becomes the slave. Stitcher Mode bypasses level 1 and 2 protocols Mode Register0 allows local TAPs to be bypassed, selected for insertion into the scan chain individually, or serially in groups of two or three Transparent Mode can be enabled with a single instruction to conveniently buffer the backplane IEEE 1149.1 pins to those on a single local scan port General purpose local port pass through bits are useful for delivering write pulses for Flash programming or monitoring device status. Known Power-up state TRST# on all local scan ports 32-bit TCK counter 16-bit LFSR Signature Compactor Local TAPs can become TRI-STATE via the OE# input to allow an alternate test master to take control of the local TAPs (LSP0-3 have a TRI-STATE notification output) 3.0-3.6V VCC Supply Operation Supports live insertion/withdrawal Description The SCANSTA112 extends the IEEE Std. 1149.1 test bus into a multidrop test bus environment. The advantage of a multidrop approach over a single serial scan chain is improved test throughput and the ability to remove a board from the system and retain test access to the remaining modules. Each SCANSTA112 supports up to 7 local IEEE1149.1 scan chains which can be accessed individually or combined serially. Addressing is accomplished by loading the instruction register with a value matching that of the Slot inputs. Backplane and inter-board testing can easily be accomplished by parking the local TAP Controllers in one of the stable TAP Controller states via a Park instruction. The 32-bit TCK counter enables built in self test operations to be performed on one port while other scan chains are simultaneously tested. The STA112 has a unique feature in that the backplane port and the LSP0 port are bidirectional. They can be configured to alternatively act as the master or slave port so an alternate test master can take control of the entire scan chain network from the LSP0 port while the backplane port becomes a slave.

Typical Application *click for larger image	Block Diagram *click for larger image

Parameters Values Temperature Min -40 deg C Temperature Max 85 deg C

Datasheets

Title		Size	Date	Other Language
	SCANSTA112 7-port Multidrop IEEE 1149.1 (JTAG) Multiplexer	692 Kbytes	20-Oct-05

Application Notes

Title		Size	Date	Other Language
	AN-1259: Application Note 1259 SCANSTA112 Designer`s Reference	689 Kbytes	5-Jan-10	中文
	AN-1312: Application Note 1312 Scan Bridge (STA111/STA112) Timing	158 Kbytes	7-Jun-10	中文
	AN-1327: Application Note 1327 Simplified Programming of Altera FPGAs Using a SCANSTA111/112 JTAG Scan Chain Mux	180 Kbytes	17-Dec-09
	AN-1340: Application Note 1340 Simplified Programming of Xilinx Devices Using a SCANSTA111/112 JTAG Chain Mux	179 Kbytes	17-Dec-09	中文

Other Technical Documents

Title		Type	Date
	JTAG Advanced Capabilities and System Design	Signal Path Designer	2009-03-19
	SCANSTA112 Quick Reference Guide	App Note	2010-01-07
	Partition IEEE 1149.1 SCAN Chains for Manageability!	App Note	2003-03-06

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
SCANSTA112SM/NOPB SCANSTA112SM RoHS Status	FBGA	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 225 AVNET-EM Worldwide 223 DIGI-KEY Worldwide 501 FARNELL Europe and Asia 5 NEWARK Americas 93 TAYLOR Americas 1033	$5.70 each at 1K+ pcs	tray of 240
SCANSTA112SMX/NOPB SCANSTA112SMX RoHS Status	FBGA	Full production Lead Time: 6 weeks	Distributor Region Qty CEAC Asia Pacific 1000 DIGI-KEY Worldwide 0	$5.70 each at 1K+ pcs	reel of 1000
SCANSTA112VS/NOPB SCANSTA112VS RoHS Status	TQFP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 89 AVNET-EM Worldwide 18 DIGI-KEY Worldwide 71 FARNELL Europe and Asia 14 NEWARK Americas 55 TAYLOR Americas 368	$5.70 each at 1K+ pcs	tray of 90
SCANSTA112VSX/NOPB SCANSTA112VSX RoHS Status	TQFP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$5.70 each at 1K+ pcs	reel of 1000

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 SCANSTA112.

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 SCANSTA112 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
SCANSTA112EVK/NOPB	7-Port Multidrop IEEE 1149.1 (JTAG) Multiplexer	Preliminary Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$195.00 each	1
The SCANSTA112EVK provides the user with a simple method to evaluate the features of the SCANSTA112 device. The STA112 Evaluation card has been designed to either function as a standalone card, or may be plugged into National`s SCAN STA Evaluation Kit backplane (available on our web site, p/n SCANSTAEVK) Click here to download the user guide

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
SCANSTA112SM/NOPB SCANSTA112SM	266.641 271.39	FBGA	100	4 3	260 235	Detail	Download	ibis file	NSUZXYTTE# SCANSTA112 SM
SCANSTA112SMX/NOPB SCANSTA112SMX	266.641 271.39	FBGA	100	4 3	260 235	Detail	Download	ibis file	NSUZXYTTE# SCANSTA112 SM
SCANSTA112VS/NOPB SCANSTA112VS	508.38 510.01	TQFP	100	3 3	260 260	Detail	Download	ibis file	NSUZXYYTTE# SCANSTA112 VS
SCANSTA112VSX/NOPB SCANSTA112VSX	508.38 510.01	TQFP	100	3 3	260 260	Detail	Download	ibis file	NSUZXYYTTE# SCANSTA112 VS

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 SCANSTA112.

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 SCANSTA112 is located at RoHS Status.

Design Tools

Title	Size	Date
SCANSTA112 Quick Reference Guide

CAD Symbols and Models Download SCANSTA112 CAD Symbols

Models ibis file

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
SCANSTA112SM	CMOS7	0	21301	0	0	1584000	3	449464325
SCANSTA112SMX	CMOS7	0	21301	0	0	1584000	3	449464325
SCANSTA112VS	CMOS7	0	21301	0	0	1584000	3	449464325
SCANSTA112VSX	CMOS7	0	21301	0	0	1584000	3	449464325

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 SCANSTA112.

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 SCANSTA112 is located at RoHS Status.