Edge646 Pin Electronics Driver, Window Comparator, and Switch Matrix EDGE HIGH-PERFORMANCE PRODUCTS Description Applications The Edge646 is an integrated trinary driver, window comparator, and switch matrix pin electronics solution manufactured in a wide voltage CMOS process. It is designed for automatic test equipment and instrumentation where cost, functional density, and power are all at a premium. • Low Cost Automatic Test Equipment The tristatable driver is capable of generating 3 levels one for a logic high, one for a logic low, and one for either a termination voltage or a special programming voltage. The on-board window comparator effectively determines whether the DUT is in a high, low, or intermediate state. Functional Block Diagram The switches are included to allow such functions as PMU, pull up, and pull down connections. VH VTT VL The Edge646 is intended to offer an extremely low leakage, low cost, low power, small footprint, per pin solution for 100 MHz and below pin electronics applications. DATA DATA* DOUT DVR EN DVR EN* VTT EN VTT EN* SW0 SW0 EN* Features SW1 • • • • • • • 100 MHz Operation 12V I/O Range Programmable Output Levels Flex In digital Inputs (Technology Independent) Three Level Driver Extremely Low Leakage Currents (~0 nA) Small Footprint (32 Pin, 7 mm X 7 mm, TQFP Package) LOAD SW1 EN* SW2 SW2 EN* VBB COMPA CVA HIGH LEVEL VINP LOW LEVEL COMPB Revision 2 /October 27, 2000 1 CVB www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS PIN Description Pin Name Pin # Description DATA / DATA* 30, 29 Digital input that determines the high/low status of the driver when it is enabled. DVR EN / DVR EN* 32, 31 Digital input that enables and disables the driver, or places the driver in the VTT state. VTT EN / VTT EN* 2, 1 Digital input that determines whether DVR EN* places the driver in a high impedance state or actively drives to the VTT level. DOUT 23 Driver Output. VH, VL, VTT 24, 25, 26 Unbuffered analog inputs that set the voltage level of a logical 1, 0, or VTT at the driver output. VBB 10 Analog input pin which establishes the threshold for all singleended digital input signals. VINP 19 Analog window comparator input. CVA, CVB 20, 18 COMPA, COMPB 5, 8 LOW LEVEL HIGH LEVEL 7 6 Driver Comparator Analog DC comparator inputs that set the threshold levels for the window comparator. Digital comparator outputs. Voltage inputs that establish the digital low and high levels of the comparator outputs. Switch Matrix SW0 EN*, SW1 EN* SW2 EN* 11, 13 15 TTL compatible inputs that activate switches 0, 1, 2, and 3. SW0 SW1 SW2 12 14 16 Switch 0 Switch 1 Switch 2 LOAD 17 Input pin that connects the DUT to the analog switches. Power Supplies VCC 3, 22, 27 Positive analog power supply. VEE 4, 21, 28 Negative analog power supply. N/C 9 No Connect pin (leave floating). 2000 Semtech Corp. 2 www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS PIN Description (continued) VL VTT VCC VEE DATA* DATA DVR EN* DVR EN 32-Pin, 7mm x 7mm TQFP 25 VTT EN* 1 VH VTT EN DOUT VCC VCC VEE VEE COMPA CVA HIGH LEVEL VINP LOW LEVEL CVB COMPB 17 LOAD 2000 Semtech Corp. 3 SW2 SW2 EN* SW1 SW1 EN* SW0 SW0 EN* VBB N/C 9 www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS Circuit Description Driver Description The Edge646 driver supports three distinct programmable driver levels; high, low, termination, and high impedance. There are no restrictions between any of these three levels in that all three may vary independently over the entire operating voltage range between VCC and VEE. The DVR EN*, DATA, and VTT EN pins are digital inputs that control the driver (see Table 1). With DVR EN* low, DATA determines whether the driver will force VH or VL at DOUT. With DVR EN* high, VTT EN* controls whether the driver goes into high impedance or drives VTT.. DVR EN* VTT EN DATA DOUT 1 0 X HiZ 1 1 X VTT 0 X 0 VL 0 X 1 VH output which series terminates the transmission line to the DUT. In this environment, the driver can withstand a short to any legal DUT voltage for an indefinite period. In a low impedance application with no additional output series resistance, care must be exercised and systems should be designed to check for this condition and tristate the driver if a short is detected. The driver does NOT have on-chip short circuit protection or limitation circuitry. VBB VBB is an analog input which establishes the threshold for all single ended digital input signals. If SW0 EN*, SW1 EN*, or SW2 EN* are more positive than VBB, these inputs are a digital “1". Conversely, if they are more negative than VBB, they are a “0". Table 1. Driver Truth Table VH, VL, and VTT VH, VL, and VTT define the logical “1”, “0”, and “termination” levels of the driver and can be adjusted anywhere over the range spanned by VCC to VEE. There is no restriction between VH, VL, and VTT, in that they can all vary independently over the entire voltage range determined by the power supply levels. The VH, VL, and VTT inputs are unbuffered in that they also provide the driver output current, so the sources of these voltages must have ample current drive capability. All digital inputs are wide voltage comparator inputs, so they are technology independent. By establishing the appropriate VBB level for the switch control inputs, and the appropriate differential input levels for the driver digital control inputs, the Edge646 may be driven by TTL, ECL, CMOS, or any custom level circuitry. SW0 EN* SW1 EN* SW2 EN* VBB While VTT is referred to as the termination voltage, it may also be used as a very high “programming” level on many memory devices. Figure 1. Driver Digital Inputs DATA DATA* Driver Output Protection DVR EN* DVR EN The Edge646 is designed to operate in a functional testing environment where a controlled impedance (typically 50 Ω) is maintained between the pin electronics and the DUT. In general, there will be an external resistor at the driver 2000 Semtech Corp. 4 VTT EN VTT EN* Figure 2. Driver Differential Digital Inputs www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS Circuit Description (continued) Receiver Functionality Load The Edge646 supports an on-board window comparator. CVB and CVA are high impedance analog inputs which establish the threshold voltages. COMPA and COMPB are the digital outputs which reflect the real time status of VINP. Table 2 summarizes the relationship between the threshold levels, VINP, and the output signals. The Edge646 provides a total of 3 analog switches. Individual switches vary in both their on resistance and their on/off time (see Table 4). VINP COMPA COMPB VINP < CVA VINP > CVA 1 0 X X VINP < CVB VINP > CVB X X 0 1 Like the driver digital inputs, the switch matrix control inputs SW0-3 EN* are technology independent as VBB determines their threshold level. The switch control is documented in Table 3. Table 2. Comparator Truth Table Comparator Outputs The comparator outputs are 50Ω output impedance nontristatable drivers designed to cleanly drive 50Ω transmission lines without requiring any external series termination resistors. Input pins LOW LEVEL and HIGH LEVEL establish the logic 0 and 1 levels respectively. In normal operation, LOW LEVEL would be connected to ground and HIGH LEVEL would be connected to a system VDD supply, producing CMOS digital swings at the output. However, the comparator outputs are technology independent in that they can drive PECL, 3V CMOS, ECL, LV CMOS, GTL, and custom levels by varying LOW LEVEL and HIGH LEVEL. For example, should a 3V swing be desired, HIGH LEVEL could be connected to a 3.0V power supply. Control Inputs Status SW0 EN* = 1 SW0 EN* = 0 SW0 disconnected SW0 connected SW1 EN* = 1 SW1 EN* = 0 SW1 disconnected SW1 connected SW2 EN* = 1 SW2 EN* = 0 SW2 disconnected SW2 connected Table 3. Switch Matrix Truth Table Switch Rout On/Off Time SW0 50 Ω 100 ns SW1 50 Ω 100 ns SW2 50 Ω 100 ns Table 4. Switch Matrix Characteristics Do NOT leave any digital input pins floating. Notice that HIGH LEVEL and LOW LEVEL provide both the voltage level and the current for the comparator outputs. HIGH LEVEL and LOW LEVEL may be varied between +5V and -2V. 2000 Semtech Corp. 5 www.semtech.com Edge646 PRELIMINARY EDGE HIGH-PERFORMANCE PRODUCTS Application Information Power Supplies Decoupling Latchup Protection A .1 µF capacitor is recommended between VCC and VEE. The Edge646 has several power supply requirements to protect the part in power supply fault situations, as well as during power up and power down sequences. VCC must remain greater than or equal to VDD (external supply for the digital logic) at all times. Both VCC and VDD must always be positive (above ground), and VEE must always be negative (at or below ground). In addition, solid VCC and VEE planes are recommended to provide a low inductance path for the power supply currents. These planes will reduce any inductive supply drops associated with swtiching currents on the power supply pins. If solid planes are not possible, then wide power busses are preferable. The three diode configuration shown in Figure 3 should be used on a once-per-board basis. VH, VL, and VTT Decoupling As the VH, VL, and VTT inputs are unbuffered and must supply the driver output current, decoupling capacitors for these inputs are recommended in proportion to the amount of output current the application requires. In general, a surge current of 50 mA (5V swings series terminated with 50 Ω into a 50 Ω transmission line) are the maximum dynamic output currents the driver should see. The decoupling capacitors should be able to provide this current for the duration of the round trip time between the pin electronics and the DUT, and then recharge themselves before the next such transition would occur. Once this condition is satisfied, the VH, VL, and VTT supply voltages are more responsible for establishing the DC levels associated with each function and recharging the capacitors, rather than providing the actual dynamic currents required to drive the DUT transmission line. VCC VDD 1N5820 or Equivalent VEE Figure 3. Power Supply Protection Scheme gure 5. Ideally, VH, VL, and VTT would each have a dedicated power layer on the PC board for the lowest possible inductance power supply distribution. 2000 Semtech Corp. 6 Warning: It is extremely important that the voltage on any device pin does not exceed the range of VEE –0.5V to VCC +0.5V at any time, either during power up, normal operation, or during power down. Failure to adhere to this requirement could result in latchup of the device, which could be destructive if the system power supplies are capable of supplying large amounts of current. Even if the device is not immediately destroyed, the cumulative damage caused by the stress of repeated latchup may affect device reliability. www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS Package Information PRELIMINARY TOP VIEW PIN Descriptions 4 D D/2 b 3 e E N / 4 TIPS 0.20 C 4 E/2 A–B D SEE DETAIL "A" 4X BOTTOM VIEW 5 7 D1 D1 / 2 E1 / 2 5 7 E1 C OO 4X 2000 Semtech Corp. 0.20 H A–B D 7 www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS Package Information (continued) DETAIL "B" DETAIL "A" 0 MIN. 3 – e/2 0.05 S 0.08 / 0.20 R. DATUM PLANE A1 0.25 –H– GAUGE PLANE A2 C.08 R. MIN. 0–7 b 0.20 MIN. L 1.00 REF. SECTION C–C ;;; ;;; 9 8 PLACES 11 / 13 b A –H– 0.05 2 // 0.10 C ccc 0.09 / 0.20 –C– M SEE DETAIL "B" 2000 Semtech Corp. A A1 A2 D D1 E E1 L M N e b b1 ccc ddd 8 M C A–B S D S WITH LEAD FINISH 0.09 / 0.16 b Notes: 1. All dimensions and tolerances conform to ANSI Y14.5-1982. 2. Datum plane -H- located at mold parting line and coincident with lead, where lead exits plastic body at bottom of parting line. 3. Datums A-B and -D- to be determined at centerline between leads where leads exit plastic body at datum plane -H-. 4. To be determined at seating plane -C-. 5. Dimensions D1 and E1 do not include mold protrusion. 6. “N” is the total # of terminals. 7. These dimensions to be determined at the datum plane -H-. 8. Package top dimensions are smaller than bottom dimensions and top of package will not overhang bottom of package. 9. Dimension b does not include dambar protrusion. Allowable dambar protrusion shall be 0.08 mm total in excess of the b dimension at maximum material condition. Dambar cannot be located on the lower radius or the foot. 10. Controlling dimension: millimeter. 11. Maximum allowable die thickness to be assembled in this package family is 0.30 millimeters. 12. This outline conforms to JEDEC publication 95, registration MO-136, variations AC, AE, and AF. ddd Lead Cross Section 1 BASE METAL JEDEC VARIATION All Dimensions in Millimeters AC Min. Nom. Max. Note 1.60 0.05 0.10 0.15 1.35 1.40 1.45 9.00 BSC. 4 7.00 BSC. 7,8 9.00 BSC. 4 7.00 BSC. 7,8 0.45 0.60 0.75 0.15 32 0.80 BSC. 0.30 0.37 0.45 9 0.30 0.35 0.40 0.10 0.20 www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS Recommended Operating Conditions Parameter Symbol Min Typ Max Units Positive Analog Power Supply VCC 6 8 12 V Negative Analog Power Supply VEE -5 -4 -3 V VCC - VEE 9 12 V Comparator Output High Level HIGH LEVEL -2 +5 V Comparator Output Low Level LOW LEVEL -2 +5 V +125 oC Total Analog Power Supply Junction Temperature TJ Absolute Maximum Ratings Parameter Symbol Min Max Units VCC - VEE 0 13 V Positive Analog Power Supply VCC 0 13 V Negative Analog Power Supply VEE -6 0 V Analog Input Voltages VEE - .5 VCC + .5 V Digital Inputs VEE - .5 VCC + .5 V -55 +125 oC -65 +150 oC +150 oC 260 oC Total Analog Power Supply Ambient Operating Temperature TA Storage Temperature Junction Temperature TJ Soldering Temperature Typ Stresses above listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2000 Semtech Corp. 9 www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS DC Characteristics Driver/Receiver Characteristics Parameter Symbol Min VH, VL, VTT VH - VL VH - VTT VTT - VLL DC Driver Output Current AC Driver Output Current (Note 1) Typ Max Units VEE VEE - VCC VEE - VCC VEE - VCC VCC VCC - VEE VCC - VEE VCC - VEE V V V V Iout DC -50 +50 mA Iout AC -220 +220 mA Output Impedance Rout 20 32 Ω DUT Pin Capacitance (Note 1) Cout 13 HiZ Leakage Current (Notes 1, 2) Ileak 0 Driver Programmable Driver Output Voltages Driver Output Swing 25 pF 4 nA VCC V 2 nA Comparator Input Voltage VINP Input Leakage Current (Notes 1, 2) IBIAS 0 Input Capacitance (Note 1) Cin 4 Offset Voltage (Note 3) VOS Receiver Threshold (Note 3) Threshold Bias Current (Note 1) VEE pF 0 +200 mV VEE + 3.0 VCC - 2.0 V 10 nA CVA, CVB 0 Digital Output High Level HIGH LEVEL -2 5 V Digital Outptu Low Level LOW LEVEL -2 5 V Digital Output Impedance (Note 4) Rout 31 45 Ω Digital Output Current Drive Imax -50 +50 mA Ron 30 44 Ω VCC V 4 nA +30 mA 37 Analog Switches (SW0, SW1, SW2) On Resistance Voltage Range VEE LOAD HiZ Leakage Current (Notes 1, 2) 0 DC Current Rating -30 SW Capacitance Total Power Supply Quiescent Positive Supply Current Quiescent Negative Supply Current 10 ICC_DC IEE_DC Total Leakage (Note 1) (DOUT + VINP + LOAD) 0 Total Capacitance (Note 1) (DOUT + VINP + LOAD) 2000 Semtech Corp. 36 27 10 pF 30 30 mA mA 10 nA pF www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS DC Characteristics (continued) Digital Inputs DATA / DATA*, DVR EN* / DVR EN, VTT EN / VTT EN* SW0 EN*, SW1 EN*, SW2 EN* Parameter Symbol Min Input High Voltage Input - Input* Input Low Voltage Input* - Input Input Current Input Capacitance Digital Input Voltage Range Digital Input Threshold Max Units .8 5 V .8 5 V 1.0 µA 8 8 8 pF pF pF IIN Typ 0 DATA DRV EN VTT EN INPUT, INPUT* -2.0* +5.0 V VBB -1.4 4.4 V *-2V or (VEE + 2.0V), whichever is more positive. Note Note Note Note 1: 2: 3: 4: This parameter is guaranteed by design and characterization. Production testing is performed against a ± 250 nA limit. Measured at 0V. Measured at HIGH LEVEL = +3V, LOW LEVEL = 0V. 2000 Semtech Corp. 11 www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS AC Characteristics Parameter Symbol Min Typ Max Units 7 7 7 7 -1.2 11 11 11 11 14 14 14 14 1.2 ns ns ns ns ns 4 5 ns Driver P ropag at ion Delay ( Not e 3) DA T A I N t o DOUT V T T EN t o DOUT DV R EN* t o DOUT ( A c t iv e t o HiZ ) ( Not e 5) DV R EN* t o DOUT ( HiZ t o A c t iv e) ( Not e 5) DA T A t o V T T P rop Delay M at c hing ( Not e 4) M inimum P ulse W idt h ( 3V Sw ing ) T og g le R at e ( Not e 6) F max DOUT Out put R ise/ F all T imes ( Not es 1, 4) 1V Sw ing ( 20% - 80%) 3V Sw ing ( 10% - 90%) 5V Sw ing ( 10% - 905) 100 1.0 M Hz 1.2 1.5 2.0 1.6 2.0 3.5 ns ns ns 1.5 1.5 8 2.5 2.5 11 ns ns ns 4 5 ns Comparator C omparat or Dig it al Out put s ( Not es 2, 4) R ise T ime ( 10% - 90%) F all t ime ( 10% - 90%) V I NP t o C OM P A , C OM P B tr tf T pd 4 M inimum P ulse W idt h T og g le R at e ( Not e 6) F max 100 M Hz ∆T pd v s. Ov erdriv e 400 mV Ov erdriv e 200 mV Ov erdriv e 3.0 5.0 ns ns T pd R ise, T pd F all Errors 2.0 ns 50 ns Sw it c h M at rix SW 0, 1, 2 EN* t o Sw it c h On/ Off Note 1: Note Note Note Note Note 2: 3: 4: 5: 6: 10 20 Into 1M of 50Ω transmission line terminated with 1KΩ and 5 pF with the proper series termination resistor. LOW LEVEL = 0V, HIGH LEVEL = 3.3V. Measured at 2.5V with VH = +5V, VL = 0V. Guaranteed by design and characterization. This parameter is not tested in production. Tested with a 30 mA load. Guaranteed by characterization. (This parameter is tested in production against 40 MHz limits.) 2000 Semtech Corp. 12 www.semtech.com Edge646 EDGE HIGH-PERFORMANCE PRODUCTS Ordering Information Model Number Package E646ATF 32-Pin TQFP EVM646ATF Edge646 Evaluation Module Contact Information Semtech Corporation Edge High-Performance Division 10021 Willow Creek Rd., San Diego, CA 92131 Phone: (858)695-1801 FAX (858)695-2633 2000 Semtech Corp. 13 www.semtech.com