SN74ALVCH16903DLR

www.ti.com SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS FEATURES • • • • • • • • Member of the Texas Instruments Widebus™ Family EPIC™ (Enhanced-Performance Implanted CMOS) Submicron Process Checks Parity Able to Cascade With a Second SN74ALVCH16903 ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) Latch-Up Performance Exceeds 250 mA Per JESD 17 Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors Package Options Include Plastic 300-mil Shrink Small-Outline (DL), Thin Shrink Small-Outline (DGG), and Thin Very Small-Outline (DGV) Packages DESCRIPTION This 12-bit universal bus driver is designed for 2.3-V to 3.6-V VCC operation. The SN74ALVCH16903 has dual outputs and can operate as a buffer or an edge-triggered register. In both modes, parity is checked on APAR, which arrives one cycle after the data to which it applies. The YERR output, which is produced one cycle after APAR, is open drain. SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 DGG, DGV, OR DL PACKAGE (TOP VIEW) OE 1Y1 1Y2 GND 2Y1 2Y2 VCC 3Y1 3Y2 4Y1 GND 4Y2 5Y1 5Y2 6Y1 6Y2 7Y1 GND 7Y2 8Y1 8Y2 VCC 9Y1 9Y2 GND 10Y1 10Y2 PAROE 1 56 2 55 3 54 4 53 5 52 6 51 7 50 8 49 9 48 10 47 11 46 12 45 13 44 14 43 15 42 16 41 17 40 18 39 19 38 20 37 21 36 22 35 23 34 24 33 25 32 26 31 27 30 28 29 CLK 1A 11A/YERREN GND 11Y1 11Y2 VCC 2A 3A 4A GND 12A 12Y1 12Y2 5A 6A 7A GND APAR 8A YERR VCC 9A MODE GND 10A PARI/O CLKEN MODE selects one of the two data paths. When MODE is low, the device operates as an edge-triggered register. On the positive transition of the clock (CLK) input and when the clock-enable (CLKEN) input is low, data set up at the A inputs is stored in the internal registers. On the positive transition of CLK and when CLKEN is high, only data set up at the 9A–12A inputs is stored in their internal registers. When MODE is high, the device operates as a buffer and data at the A inputs passes directly to the outputs. 11A/YERREN serves a dual purpose; it acts as a normal data bit and also enables YERR data to be clocked into the YERR output register. When used as a single device, parity output enable (PAROE) must be tied high; when parity input/output (PARI/O) is low, even parity is selected and when PARI/O is high, odd parity is selected. When used in pairs and PAROE is low, the parity sum is output on PARI/O for cascading to the second SN74ALVCH16903. When used in pairs and PAROE is high, PARI/O accepts a partial parity sum from the first SN74ALVCH16903. A buffered output-enable (OE) input can be used to place the 24 outputs and YERR in either a normal logic state (high or low logic levels) or a high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without need for interface or pullup components. OE does not affect the internal operation of the device. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. 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. Widebus, EPIC are trademarks of Texas Instruments. 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 © 1997–2004, Texas Instruments Incorporated SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 DESCRIPTION (CONTINUED) To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. The SN74ALVCH16903 is characterized for operation from 0°C to 70°C. FUNCTION TABLES FUNCTION INPUTS (1) OUTPUTS OE MODE CLKEN CLK A 1Yn (1)–8Yn (1) 9Yn (1)–12Yn (1) L L L ↑ H H H L L L ↑ L L L L L H ↑ H Y0 H L L H ↑ L Y0 L L H X X H H H L H X X L L L H X X X X Z Z n = 1 or 2 PARITY FUNCTION INPUTS OE (1) (2) PAROE (1) 11A/YERREN (2) PARI/O Σ OF INPUTS 1A–10A = H APAR OUTPUT YERR 0, 2, 4, 6, 8, 10 L H L L H L L L H L L 1, 3, 5, 7, 9 L L H L L 0, 2, 4, 6, 8, 10 H L L H L L 1, 3, 5, 7, 9 H H L H L H 0, 2, 4, 6, 8, 10 L L L H L H 1, 3, 5, 7, 9 L H L H L H 0, 2, 4, 6, 8, 10 H H L H L H 1, 3, 5, 7, 9 H L H X X X X X H L X H X X X H When used as a single device, PAROE must be tied high. Valid after appropriate number of clock pulses have set internal register PARI/O FUNCTION (1) INPUTS (1) 2 PAROE Σ OF INPUTS 1A–10A = H APAR OUTPUT PARI/O L 0, 2, 4, 6, 8, 10 L L L 1, 3, 5, 7, 9 L H L 0, 2, 4, 6, 8, 10 H H L 1, 3, 5, 7, 9 H L H X X Z This table applies to the first device of a cascaded pair of SN74ALVCH16903 devices. SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 LOGIC DIAGRAM (POSITIVE LOGIC) OE MODE CLK 1 33 13 1A−12A, APAR (1A−12A) 12 13 1Y2−12Y2 13 CLKEN 1Y1−12Y1 12 56 29 (1A−8A) 8 13 12 (1A−11A/YERREN, APAR) D 11A/YERREN Q Flip-Flop 11 5 (9A−12A, APAR) APAR 5 APAR Flip-Flop D Q D Q 10 (1A−10A) Parity Check 36 XOR D Q YERR 30 PARI/O PAROE 28 3 SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) MIN MAX UNIT VCC Supply voltage range -0.5 4.6 V VI Input voltage range (2) -0.5 4.6 V VO Output voltage range (2) (3) -0.5 VCC + 0.5 IIK Input clamp current VI < 0 IOK Output clamp current VO < 0 IO Continuous output current Continuous current through each VCC or GND θJA Package thermal impedance (4) Tstg (1) (2) (3) (4) mA -50 mA ±50 mA ±100 mA DGG package 81 DGV package 86 DL package 74 Storage temperature range -65 V -50 150 °C/W °C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed. This value is limited to 4.6 V maximum. The package thermal impedance is calculated in accordance with JESD 51. RECOMMENDED OPERATING CONDITIONS (1) MIN MAX 2.3 3.6 UNIT VCC Supply voltage VIH High-level input voltage VIL Low-level input voltage VI Input voltage 0 VCC V VO Output voltage 0 VCC V VCC = 2.3 V to 2.7 V 1.7 VCC = 2.7 V to 3.6 V 2 IOH High-level output current 0.7 VCC = 2.7 V to 3.6 V 0.8 VCC = 2.7 V VCC = 3 V VCC = 2.3 V VCC = 2.7 V IOL V VCC = 2.3 V to 2.7 V VCC = 2.3 V Low-level output current VCC = 3 V V V -12 Y port -12 PARI/O -12 Y port -24 mA 12 Y port 12 PARI/O 12 Y port 24 YERR output mA 24 ∆t/∆v Input transition rise or fall rate 0 10 ns/V TA Operating free-air temperature 0 70 °C (1) 4 All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 ELECTRICAL CHARACTERISTICS over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = -100 µA IOH = -6 mA, Y port VOH PARI/O IOH = -12 mA 2.3 V 2 VIH = 1.7 V 2.3 V 1.7 2.7 V 2.2 VIH = 2 V 3V 2.4 VIH = 2 V 3V 2 IOH = -12 mA, VIH = 2 V 3V 2 IOL = 12 mA 2.3 V to 3.6 V 0.2 VIL = 0.7 V 2.3 V 0.4 VIL = 0.7 V 2.3 V 0.7 VIL = 0.8 V 2.7 V 0.4 VIL = 0.8 V 3V 0.55 PARI/O IOL = 12 mA, VIL = 0.8 V 3V 0.55 YERR output IOL = 24 mA 3V 0.5 II(hold) 3.6 V VI = 0.7 V 2.3 V 45 VI = 1.7 V 2.3 V -45 VI = 0.8 V 3V 75 VI = 2 V 3V -75 VO = VCC IOZ (3) VO = VCC or GND ICC VI = VCC or GND, ∆ICC One input at VCC - 0.6 V, Other inputs at VCC or GND Ci Co Cio (1) (2) (3) Control inputs Data inputs YERR output Data outputs PARI/O ±5 VI = VCC or GND VI = 0 to 3.6 V (2) YERR output UNIT V IOL = 24 mA, II IOH MAX 2.3 V to 3.6 V VCC - 0.2 IOH = -24 mA, IOL = 6 mA, VOL MIN TYP (1) VIH = 1.7 V IOL = 100 µA Y port VCC IO = 0 V µA µA 3.6 V ±500 0 to 3.6 V ±10 µA 3.6 V ±10 µA 3.6 V 40 µA 3 V to 3.6 V 750 µA VI = VCC or GND 3.3 V VO = VCC or GND 3.3 V VO = VCC or GND 3.3 V 5.5 5.5 5 6 7 pF pF pF All typical values are at VCC = 3.3 V, TA = 25°C. This is the bus-hold maximum dynamic current. It is the minimum overdrive current required to switch the input from one state to another. For I/O ports, the parameter IOZ includes the input leakage current. 5 SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 TIMING REQUIREMENTS over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 1 and Figure 4) VCC = 2.5 V ± 0.2 V MIN fclock Clock frequency tw Pulse duration, CLK↑ tsu Setup time MIN 125 MAX MIN 125 3 3 Register mode 1.7 1.9 1.45 1A–10A before CLK↑ Buffer mode 5.9 5.2 4.4 Register mode 1.2 1.5 1.3 Buffer mode 4.6 3.6 3.1 PARI/O before CLK↑ Both modes 2.4 2 1.7 11A/YERREN before CLK↑ Buffer mode 2 1.9 1.6 CLKEN before CLK↑ Register mode 2.5 2.6 2.2 1A–12A after CLK↑ Register mode 1A–10A after CLK↑ Buffer mode APAR before CLK↑ Hold time PARI/O after CLK↑ 0.4 0.25 0.55 0.25 0.25 0.25 0.7 0.4 0.7 Buffer mode 0.25 0.25 0.25 Register mode 0.25 0.25 0.4 Register mode UNIT MAX 125 3 1A–12A before CLK↑ APAR after CLK↑ th MAX VCC = 3.3 V ± 0.3 V VCC = 2.7 V Buffer mode 0.25 0.25 0.5 11A/YERREN after CLK↑ Buffer mode 0.25 0.25 0.4 CLKEN after CLK↑ Register mode 0.25 0.5 0.4 MHz ns ns ns SWITCHING CHARACTERISTICS over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1 and Figure 4) VCC = 2.5 V ± 0.2 V VCC = 3.3 V ± 0.3 V VCC = 2.7 V FROM (INPUT) TO (OUTPUT) Buffer mode A Y 1 4.4 4.2 1.1 3.8 Both modes CLK YERR 1 5.7 4.9 1.4 4.4 PARI/O 1.2 8.6 7.9 1.7 6.6 tpd (1) Both modes CLK PARI/O 1 6.8 5.2 1.3 4.5 ns tpd Both modes MODE Y 1 5.9 5.8 1.3 4.9 ns CLK Y 1 6.1 5.5 1.2 4.8 1 5.9 4.9 1.2 4.6 OE Y 1.1 6.5 6.4 1.4 5.4 PAROE PARI/O 1 5.6 6 1 4.8 PARAMETER fmax tPHL Register mode ten Both modes tdis Both modes tPLH tPHL (1) 6 MAX 125 tpd tPLH MIN Both modes MIN MAX 125 MIN UNIT MAX 125 MHz OE Y 1 6.4 5.2 1.7 5 PAROE PARI/O 1 3.2 3.8 1.2 3.8 OE YERR 1 3.6 4.2 1.9 4 1.2 5.1 4.9 1.5 4.2 See Figure 2 and Figure 5 for the load specification. ns ns ns ns ns SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 SIMULTANEOUS SWITCHING CHARACTERISTICS (1) (see Figure 3 and Figure 6) PARAMETER tPLH tPHL (1) Register mode FROM (INPUT) TO (OUTPUT) CLK Y VCC = 2.5 V ± 0.2 V MIN MAX 1.8 1.4 VCC = 2.7 V MIN VCC = 3.3 V ± 0.3 V UNIT MAX MIN MAX 6.5 6.1 1.8 5 5.9 5.1 1.7 4.5 ns All outputs switching OPERATING CHARACTERISTICS FOR BUFFER MODE TA = 25°C PARAMETER Cpd Power dissipation capacitance TEST CONDITIONS Outputs enabled Outputs disabled CL = 0, f = 10 MHz VCC = 2.5 V ± 0.2 V VCC = 3.3 V ± 0.3 V TYP TYP 57.5 65 15 17.5 VCC = 2.5 V ± 0.2 V VCC = 3.3 V ± 0.3 V TYP TYP 57 87.5 16.5 34 UNIT pF OPERATING CHARACTERISTICS FOR REGISTER MODE TA = 25°C PARAMETER Cpd Power dissipation capacitance TEST CONDITIONS Outputs enabled Outputs disabled CL = 0, f = 10 MHz UNIT pF 7 SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 PARAMETER MEASUREMENT INFORMATION VCC = 2.5 V ± 0.2 V 2 × VCC S1 500 Ω From Output Under Test Open GND CL = 30 pF (see Note A) 500 Ω TEST S1 tpd tPLZ/tPZL tPHZ/tPZH Open 2 × VCC GND YERR S1 tPHL (see Note H) tPLH (see Note I) LOAD CIRCUIT 2 × VCC 2 × VCC tw VCC Timing Input VCC/2 VCC/2 0V tsu VOLTAGE WAVEFORMS PULSE DURATION VCC/2 VCC/2 0V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VCC/2 VCC/2 0V tPLH Output Control (low-level enabling) VCC/2 VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES tPLZ VCC VCC/2 tPZH VOH VCC/2 0V Output Waveform 1 S1 at 2 × VCC (see Note B) tPHL VCC/2 VCC VCC/2 tPZL VCC Input 0V th VCC Data Input Output VCC VCC/2 Input Output Waveform 2 S1 at GND (see Note B) VOL + 0.15 V VOL tPHZ VCC/2 VOH VOH − 0.15 V 0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2 ns, tf ≤ 2 ns. D. The outputs are measured one at a time, with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd. H. tPHL is measured at VCC/2. I. tPLH is measured at VOL + 0.15 V. Figure 1. Load Circuit and Voltage Waveforms 8 SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 PARAMETER MEASUREMENT INFORMATION VCC = 2.5 V ± 0.2 V From Output Under Test PARI/O Test Point PARI/O of Second ALVCH16903 ZO = 52 Ω td = 63 ps CL = 0.6 pF (see Note A) CL = 0.6 pF (see Note A) LOAD CIRCUIT VCC Input VCC/2 VCC/2 0V tPLH tPHL VOH Output VCC/2 VCC/2 VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2 ns, tf ≤ 2 ns. C. tPLH and tPHL are the same as tpd. Figure 2. Load Circuit and Voltage Waveforms VCC From Output Under Test RL = 10 Ω Test Point Input VCC/2 VCC/2 0V tPLH CL = 30 pF (see Note A) tPHL VOH Output VCC/2 VCC/2 VOL LOAD CIRCUIT VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2 ns, tf ≤ 2 ns. Figure 3. Load Circuit and Voltage Waveforms 9 SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 PARAMETER MEASUREMENT INFORMATION VCC = 2.7 V AND 3.3 V ± 0.3 V 6V S1 500 Ω From Output Under Test Open GND CL = 50 pF (see Note A) TEST S1 tpd tPLZ/tPZL tPHZ/tPZH Open 6V GND 500 Ω YERR S1 tPHL (see Note H) tPLH (see Note I) 6V 6V LOAD CIRCUIT tw 2.7 V 2.7 V Timing Input 1.5 V 1.5 V Input 1.5 V 0V 0V tsu VOLTAGE WAVEFORMS PULSE DURATION th 2.7 V Data Input 1.5 V 1.5 V 0V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES Output Control (low-level enabling) 2.7 V 1.5 V 1.5 V 0V tPZL 2.7 V Input 1.5 V 1.5 V 0V tPLH 1.5 V 1.5 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES 3V 1.5 V VOL + 0.3 V VOL tPZH tPHL VOH Output Output Waveform 1 S1 at 6 V (see Note B) tPLZ Output Waveform 2 S1 at GND (see Nte B) tPHZ 1.5 V VOH VOH − 0.3 V 0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. D. The outputs are measured one at a time, with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd. H. tPHL is measured at 1.5 V. I. tPLH is measured at VOL + 0.3 V. Figure 4. Load Circuit and Voltage Waveforms 10 SN74ALVCH16903 3.3-V 12-BIT UNIVERSAL BUS DRIVER WITH PARITY CHECKER AND DUAL 3-STATE OUTPUTS www.ti.com SCES095D – MARCH 1997 – REVISED SEPTEMBER 2004 PARAMETER MEASUREMENT INFORMATION VCC = 2.7 V AND 3.3 V ± 0.3 V From Output Under Test PARI/O Test Point PARI/O of Second ALVCH16903 ZO = 52 Ω td = 63 ps CL = 0.6 pF (see Note A) CL = 0.6 pF (see Note A) LOAD CIRCUIT 2.7 V Input 1.5 V 1.5 V 0V tPLH tPHL VOH Output 1.5 V 1.5 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. C. tPLH and tPHL are the same as tpd. Figure 5. Load Circuit and Voltage Waveforms 2.7 V From Output Under Test RL = 10 Ω Test Point Input 1.5 V 1.5 V 0V tPLH CL = 50 pF (see Note A) tPHL VOH Output 1.5 V 1.5 V VOL LOAD CIRCUIT VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. Figure 6. Load Circuit and Voltage Waveforms 11 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) (3) Device Marking (4/5) (6) SN74ALVCH16903DL ACTIVE SSOP DL 56 20 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 ALVCH16903 (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