SN74ALVCH16271DL

SN74ALVCH16271 12-BIT TO 24-BIT MULTIPLEXED BUS EXCHANGER WITH 3-STATE OUTPUTS www.ti.com SCES017G – JULY 1995 – REVISED SEPTEMBER 2004 FEATURES • • • • DGG OR DL PACKAGE (TOP VIEW) Member of the Texas Instruments Widebus™ Family Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors Latch-Up Performance Exceeds 250 mA Per JESD 17 ESD Protection Exceeds JESD 22 - 2000-V Human-Body Model (A114-A) - 200-V Machine Model (A115-A) OEA LE1B 2B3 GND 2B2 2B1 VCC A1 A2 A3 GND A4 A5 A6 A7 A8 A9 GND A10 A11 A12 VCC 1B1 1B2 GND 1B3 LE2B SEL DESCRIPTION/ORDERING INFORMATION This 12-bit to 24-bit bus exchanger is designed for 1.65-V to 3.6-V VCC operation. The SN74ALVCH16271 is intended for applications in which two separate data paths must be multiplexed onto, or demultiplexed from, a single data path. This device is particularly suitable as an interface between conventional DRAMs and high-speed microprocessors. A data is stored in the internal A-to-B registers on the low-to-high transition of the clock (CLK) input, provided that the clock-enable (CLKENA) inputs are low. Proper control of these inputs allows two sequential 12-bit words to be presented as a 24-bit word on the B port. Transparent latches in the B-to-A path allow asynchronous operation to maximize memory access throughput. These latches transfer data when the latch-enable (LE) inputs are low. The select (SEL) line selects 1B or 2B data for the A outputs. Data flow is controlled by the active-low output enables (OEA, OEB). 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 OEB CLKENA2 2B4 GND 2B5 2B6 VCC 2B7 2B8 2B9 GND 2B10 2B11 2B12 1B12 1B11 1B10 GND 1B9 1B8 1B7 VCC 1B6 1B5 GND 1B4 CLKENA1 CLK line space To ensure the high-impedance state during power up or power down, the output enables 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 holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. ORDERING INFORMATION PACKAGE (1) TA -40°C to 85°C SSOP - DL TSSOP - DGG (1) ORDERABLE PART NUMBER TOP-SIDE MARKING Tube SN74ALVCH16271DL Tape and reel SN74ALVCH16271DLR Tape and reel SN74ALVCH16271DGGR ALVCH16271 ALVCH16271 Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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 is a trademark 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 © 1995–2004, Texas Instruments Incorporated SN74ALVCH16271 12-BIT TO 24-BIT MULTIPLEXED BUS EXCHANGER WITH 3-STATE OUTPUTS www.ti.com SCES017G – JULY 1995 – REVISED SEPTEMBER 2004 FUNCTION TABLES line space OUTPUT ENABLE INPUTS OUTPUTS OEA OEB A 1B, 2B H H Z Z Active H L Z L H Active Z L L Active Active A-TO-B STORAGE (OEB = L) INPUTS CLKENA1 (1) CLKENA2 OUTPUTS CLK A 1B X 1B0 2B (1) 2B0 (1) H H X L X ↑ L L X L X ↑ H H X X L ↑ L X L X L ↑ H A0 H Output level before the indicated steady-state input conditions were established B-TO-A STORAGE (OEA = L) INPUTS (1) 2 LE SEL 1B 2B OUTPUT A H X X X A0 (1) H X X X A0 (1) L H L X L L H H X H L L X L L L L X H H Output level before the indicated steady-state input conditions were established SN74ALVCH16271 12-BIT TO 24-BIT MULTIPLEXED BUS EXCHANGER WITH 3-STATE OUTPUTS www.ti.com SCES017G – JULY 1995 – REVISED SEPTEMBER 2004 LOGIC DIAGRAM (POSITIVE LOGIC) CLK 29 2 LE1B 27 LE2B CLKENA1 30 55 CLKENA2 56 OEB 28 SEL LE 23 1 1B1 1D OEA G1 1 8 A1 LE 1 6 1D 2B1 CE C1 1D CE C1 1D 1 of 12 Channels 3 SN74ALVCH16271 12-BIT TO 24-BIT MULTIPLEXED BUS EXCHANGER WITH 3-STATE OUTPUTS www.ti.com SCES017G – JULY 1995 – REVISED SEPTEMBER 2004 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) VCC Supply voltage range MIN MAX -0.5 4.6 Except I/O ports (2) -0.5 4.6 I/O ports (2) (3) -0.5 VCC + 0.5 -0.5 VCC + 0.5 UNIT V VI Input voltage range VO Output voltage range (2) (3) IIK Input clamp current VI < 0 -50 mA IOK Output clamp current VO < 0 -50 mA IO Continuous output current ±50 mA ±100 mA Continuous current through each VCC or GND θJA Package thermal impedance (4) Tstg Storage temperature range (1) (2) (3) (4) DGG package 64 DL package 56 -65 150 V V °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 51-7. RECOMMENDED OPERATING CONDITIONS (1) VCC Supply voltage VCC = 1.65 V to 1.95 V VIH High-level input voltage MIN MAX 1.65 3.6 UNIT V 0.65 × VCC VCC = 2.3 V to 2.7 V 1.7 VCC = 2.7 V to 3.6 V 2 V 0.35 × VCC VCC = 1.65 V to 1.95 V VIL Low-level input voltage VCC = 2.3 V to 2.7 V 0.7 VI Input voltage 0 VCC V VO Output voltage 0 VCC V VCC = 2.7 V to 3.6 V IOH High-level output current IOL Low-level output current ∆t/∆v Input transition rise or fall rate TA Operating free-air temperature (1) 4 V 0.8 VCC = 1.65 V -4 VCC = 2.3 V -12 VCC = 2.7 V -12 VCC = 3 V -24 VCC = 1.65 V 4 VCC = 2.3 V 12 VCC = 2.7 V 12 VCC = 3 V 24 -40 mA mA 10 ns/V 85 °C 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. SN74ALVCH16271 12-BIT TO 24-BIT MULTIPLEXED BUS EXCHANGER WITH 3-STATE OUTPUTS www.ti.com SCES017G – JULY 1995 – REVISED SEPTEMBER 2004 ELECTRICAL CHARACTERISTICS over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = -100 µA 1.65 V to 3.6 V 1.65 V IOH = -6 mA 2.3 V 2 2.3 V 1.7 2.7 V 2.2 3V 2.4 IOH = -24 mA 3V 2 IOL = 100 µA IOH = -12 mA II(hold) V 1.65 V to 3.6 V 0.2 1.65 V 0.45 IOL = 6 mA 2.3 V 0.4 2.3 V 0.7 IOL = 24 mA 2.7 V 0.4 3V 0.55 3.6 V VI = 0.58 V 1.65 V 25 VI = 1.07 V 1.65 V -25 VI = 0.7 V 2.3 V 45 VI = 1.7 V 2.3 V -45 VI = 0.8 V 3V 75 3V -75 VI = 0 to 3.6 VO = VCC or GND ICC VI = VCC or GND, IO = 0 ∆ICC One input at VCC - 0.6 V, Other inputs at VCC or GND µA µA 3.6 V ±500 3.6 V ±10 µA 3.6 V 40 µA 3 V to 3.6 V 750 µA V (2) IOZ (3) V ±5 VI = VCC or GND VI = 2 V UNIT 1.2 IOL = 4 mA IOL = 12 mA II MAX VCC - 0.2 IOH = -4 mA VOH VOL MIN TYP (1) VCC Ci Control inputs VI = VCC or GND 3.3 V 3.5 pF Cio A or B ports VO = VCC or GND 3.3 V 9 pF (1) (2) (3) 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. TIMING REQUIREMENTS over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1 through Figure 3) VCC = 2.5 V ± 0.2 V MIN fclock Clock frequency tw Pulse duration, CLK high or low tsu th Setup time Hold time MAX VCC = 2.7 V MIN 130 MAX VCC = 3.3 V ± 0.3 V MIN 130 130 3.3 3.3 3.3 A before CLK↑ 2.6 2.1 1.7 B before LE 1.7 1.5 1.3 CLKEN before CLK↑ 1.6 1.3 1 A after CLK↑ 0.6 0.6 0.7 B after LE 0.9 0.9 1.1 1 0.9 0.9 CLKEN after CLK↑ UNIT MAX MHz ns ns ns 5 SN74ALVCH16271 12-BIT TO 24-BIT MULTIPLEXED BUS EXCHANGER WITH 3-STATE OUTPUTS www.ti.com SCES017G – JULY 1995 – REVISED SEPTEMBER 2004 SWITCHING CHARACTERISTICS over recommended operating free-air temperature range (unless otherwise noted) (see Figure 1 through Figure 3) PARAMETER VCC = 3.3 V ± 0.3 V TO (OUTPUT) VCC = 1.8 V CLK B 8 1 6.2 5 1 7 1 5.3 4.7 1.4 4 7 1 6 5.9 1.4 4.8 7 1.1 6.4 6.2 1.3 5.2 TYP fmax tpd VCC = 2.5 V ± 0.2 V FROM (INPUT) MIN VCC = 2.7 V MAX 130 B LE A SEL MIN MAX 130 MIN UNIT MAX 130 MHz 4.3 ns ten OEB or OEA B or A 8 1 6 6.1 1 5.1 ns tdis OEB or OEA B or A 7 1.4 5.4 4.6 1.7 4.2 ns OPERATING CHARACTERISTICS TA = 25°C PARAMETER TEST CONDITIONS A to B Cpd Power dissipation capacitance B to A 6 VCC = 2.5 V VCC = 3.3 V TYP TYP Outputs enabled 92 105 Outputs disabled 61 76 39 43 11 13 Outputs enabled Outputs disabled CL = 0, f = 10 MHz UNIT pF SN74ALVCH16271 12-BIT TO 24-BIT MULTIPLEXED BUS EXCHANGER WITH 3-STATE OUTPUTS www.ti.com SCES017G – JULY 1995 – REVISED SEPTEMBER 2004 PARAMETER MEASUREMENT INFORMATION VCC = 1.8 V 2 × VCC 1 kΩ From Output Under Test S1 Open TEST tpd tPLZ/tPZL tPHZ/tPZH GND CL = 30 pF (see Note A) 1 kΩ S1 Open 2 × VCC GND LOAD CIRCUIT tw VCC Timing Input VCC/2 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 VOLTAGE WAVEFORMS PULSE DURATION th VCC Data Input VCC/2 0V 0V tsu 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. Figure 1. Load Circuit and Voltage Waveforms 7 SN74ALVCH16271 12-BIT TO 24-BIT MULTIPLEXED BUS EXCHANGER WITH 3-STATE OUTPUTS www.ti.com SCES017G – JULY 1995 – REVISED SEPTEMBER 2004 PARAMETER MEASUREMENT INFORMATION VCC = 2.5 V ± 0.2 V 2 × VCC 500 Ω From Output Under Test S1 Open TEST tpd tPLZ/tPZL tPHZ/tPZH GND CL = 30 pF (see Note A) 500 Ω S1 Open 2 × VCC GND LOAD CIRCUIT tw VCC Timing Input VCC/2 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 VOLTAGE WAVEFORMS PULSE DURATION th VCC Data Input VCC/2 0V 0V tsu 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. Figure 2. Load Circuit and Voltage Waveforms 8 SN74ALVCH16271 12-BIT TO 24-BIT MULTIPLEXED BUS EXCHANGER WITH 3-STATE OUTPUTS www.ti.com SCES017G – JULY 1995 – REVISED SEPTEMBER 2004 PARAMETER MEASUREMENT INFORMATION VCC = 2.7 V AND 3.3 V ± 0.3 V 6V 500 Ω From Output Under Test S1 Open GND CL = 50 pF (see Note A) 500 Ω TEST S1 tpd tPLZ/tPZL tPHZ/tPZH Open 6V GND tw LOAD CIRCUIT 2.7 V 2.7 V Timing Input 1.5 V Input 1.5 V 0V 1.5 V 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 2.7 V Output Control (low-level enabling) 1.5 V 0V tPZL 2.7 V Input 1.5 V 1.5 V 0V tPLH VOH Output 1.5 V 1.5 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES Output Waveform 1 S1 at 6 V (see Note B) tPLZ 3V 1.5 V VOL + 0.3 V VOL tPZH tPHL 1.5 V Output Waveform 2 S1 at GND (see Note B) tPHZ VOH 1.5 V 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. Figure 3. Load Circuit and Voltage Waveforms 9 PACKAGE OPTION ADDENDUM www.ti.com 14-Oct-2022 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 Samples (4/5) (6) SN74ALVCH16271DGGR ACTIVE TSSOP DGG 56 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 ALVCH16271 (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