IDT74GTLP306 8-BIT LVTTL/GTLP BUS TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE 8-BIT LVTTL/GTLP BUS TRANSCEIVER FEATURES: • • • • • DESCRIPTION: Bidirectional interface between GTLP and LVTTL logic levels Edge Rate Control Circuit reduces output noise VREF pin provides reference voltage for receiver threshold CMOS technology for low power dissipation Special PVT Compensation circuitry to provide consistent performance over variations of process, supply voltage, and temperature 5V tolerant inputs on LVTTL ports Bus-Hold to eliminate the need for external pull-up resistors for unused inputs to A-Port Power up/down and power-off high-impedance for live insertion TTL-compatible Driver and Control inputs High Output source/sink ±24mA on A-Port pins Flow-through architecture optimizes system layout Open drain on GTLP to support wired OR connection ESD performance of >2000V Available in TSSOP package • • • • • • • • • IDT74GTLP306 PRELIMINARY The GTLP306 is an 8-bit bus transceiver. It provides signal level translation, from LVTTL to GTLP, for applications requiring a high-speed interface between cards operating at LVTTL logic levels and back-planes operating at GTLP logic levels. GTLP provides reduced output swing (<1V), reduced input threshold levels, and output edge-rate control to minimize signal setting times. The GTLP306 is a derivative of the Gunning Transceiver Logic (GTL) JEDEC standard JESD8-3 and incorporates internal edge-rate control, which is process, voltage, and temperature (PVT) compensated. The GTLP306 combines a transceiver function with an LVTTL to GTLP translation. Data polarity is non-inverting, and the data flow direction is controlled by the T/R pin. The outputs are enabled to allow data through the device when OE is low. Otherwise, both A and B are placed in a highimpedance state. GTLP output low voltage is less than 0.5V. The output high is 1.5V, and the receiver threshold is 1V. FUNCTIONAL BLOCK DIAGRAM T/R OE B0 (GTLP I/O) A0 (LVTTL I/O) TO SEVEN OTHER CHANNELS The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE MAY 2002 1 c 2002 Integrated Device Technology, Inc. DSC-5978/8 IDT74GTLP306 8-BIT LVTTL/GTLP BUS TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1,2) PIN CONFIGURATION Symbol OE 1 VCC 2 VCC Rating Max. Unit Supply Voltage –0.5 to +7 V 24 T/R VI DC Input Voltage –0.5 to +7 V 23 VREF VO DC Output Voltage, 3-State –0.5 to +7 V VO DC Output Voltage, Active –0.5 to +7 V A0 3 22 B0 4 IOL DC Output Sink Current into A-port 48 mA A1 21 B1 IOH DC Output Source Current from A-port –48 mA A2 5 20 B2 IOL DC Output Sink Current into B-port 100 mA A3 6 GND A4 19 B3 7 18 GND 8 17 B4 A5 9 16 B5 A6 10 15 B6 A7 11 14 B7 GND 12 13 GND (in the LOW state) IIK DC Input Diode Current VI < 0V –50 mA IOK DC Output Diode Current VO < 0V –50 mA IOK DC Output Diode Current VO > VCC +50 mA TSTG Storage Temperature –65 to +150 °C NOTES: 1. Stresses greater than those 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 indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. Unused inputs without Bus-Hold must be held HIGH or LOW. TSSOP TOP VIEW CAPACITANCE (TA = +25°C, f = 1.0MHZ) Symbol PIN DESCRIPTION Pin Names Output Enable (Active LOW) T/R Transmit/Receive Input VREF GTLP Input Reference Voltage A0 - A7 Side A Inputs or 3-State Outputs B0 - B7 Side B Inputs or 3-State Outputs Inputs T/R X High Z on Bus A and Bus B L L Bus B Data to Bus A L H Bus A Data to Bus B Max. Unit C IN Control Pins VI = VCCQ or 0 5 — pF CI/O A-Port VI = VCCQ or 0 7 — pF CI/O B-Port VI = VCCQ or 0 9 — pF Symbol FUNCTION TABLE(1) H Typ.(2) RECOMMENDED OPERATING CONDITIONS(1) NOTE: 1. A-Port pins have Bus-Hold. All other pins are standard input, output, or I/O. OE Conditions NOTES: 1. As applicable to the device type. 2. All typical values are at VCC = 3.3V. Description(1) OE Parameter(1) Output Recommended Unit VCC Supply Voltage Rating 3.15 to 3.45 V VTT Bus Termination Voltage 1.35 to 1.65 V VI Input Voltage on A-Port and Control Pins 0 to 5.5 V IOH HIGH Level Output Current (A-Port) -24 mA IOL LOW Level Output Current (A-Port) +24 mA IOL LOW Level Output Current (B-Port) 50 mA TA Operating Temperature –40 to +85 °C NOTE: 1. Unused inputs without Bus-Hold must be held HIGH or LOW. NOTE: 1. H = HIGH Voltage Level X = Don’t Care L = LOW Voltage Level 2 IDT74GTLP306 8-BIT LVTTL/GTLP BUS TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VREF = 1V, VCC = 3.3V ± 5% Symbol VIH VIL Test Conditions Min. Typ.(1) Max. Unit B-Port — VREF+ 0.05 — V TT V All Other ports — 2 — — B-Port — 0 — VREF– 0.05 All Other ports — — — 0.8 GTLP — — 1 — — 0.8 — — — –1.2 Parameter VREF GTL VIK — A-Port — VCC = 3.15V VCC = Min to Max II = –18mA (2) VCC = 3.15V VOH A-Port IOH = –100µA VCC–0.2 — — IOH = –12mA 2.4 — — IOH = –24mA 2 — — VCC = Min to Max(2) IOL = 100µA — — 0.2 VCC = 3.15V IOL = 24mA — — 0.5 B-Port VCC = 3.15V IOL = 40mA — — 0.4 IOL = 50mA — — 0.55 Control Pins VCC = 3.45V VI = 5.5V or 0V — — ±5 A-Port VCC = 3.45V VOL II B-Port VCC = 3.45V VI = 5.5V — — 20 VI = 0 — — –20 VI = VTT — — 5 VI = 0 — — –5 V V V V V µA IOFF A-Port VCC = 0 VI or VO = 0 to 4.5V — — 100 µA II (HOLD) A-Port VCC = 3.15V VI = 0.8V 75 — — µA VI = 2V –20 — — IOZH A-Port VCC = 3.45V VO = 3.45 V — — 20 VO = 1.5V — — 5 VCC = 3.45V VO = 0 — — –20 B-Port IOZL A-Port B-Port ICC (VCC) ∆ICC (3) A or B Ports A-Port and Control Pins VO = 0.55V — — –5 VCC = 3.45V Outputs HIGH — 7 18 IO = 0 Outputs LOW — 8 20 VI = VCC or GND Outputs Disabled — 8 20 VCC = 3.45V One Input at VCC - 0.6V — 0 1 A or Control Inputs at VCC or GND NOTES: 1. All typical values are at VCC = 3.3V and TA = 25°C. 2. For conditions shown as Max. or Min., use appropriate value specified under Recommended Operating Conditions. 3. ∆ICC is the increase in supply current for each input that is at the specified LVTTL voltage level rather than VCC or GND. 3 µA µA mA mA IDT74GTLP306 8-BIT LVTTL/GTLP BUS TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE SWITCHING CHARACTERISTICS OVER OPERATING RANGE (1,2) Symbol tPLH Parameter Min. Ax to Bx tPHL tPLH Bx to Ax tPHL Typ.(3) Max. Unit ns 1 4 7.5 1 5.1 7.5 1 5.8 8.3 1 4.9 8.3 ns tRISE Transition Time, B outputs (20% to 80%) — 2.6 — ns tFALL Transition Time, B outputs (20% to 80%) — 2.6 — ns tRISE Transition Time, A outputs (10% to 90%) — 2.5 — ns tFALL Transition Time, A outputs (10% to 90%) — 2.5 — ns OE to Ax 1 4.5 9.5 ns 1 4.9 9.5 1 5.4 9.5 1 6 9.5 tPZH, tPZL tPHZ, tPLZ tPLH OE to Bx tPHL NOTES: 1. See Test Circuits and Waveforms. TA = –40°C to +85°C. 2. Unless otherwise noted, VREF = 1V. 3. Typical values are at VCC = 3.3V and TA = 25°C. 4 ns IDT74GTLP306 8-BIT LVTTL/GTLP BUS TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS 500Ω FROM OUTPUT UNDER TEST S 1.5V (GTLP) 1.2V (GTL) 6V Open GND 25Ω FROM OUTPUT UNDER TEST 500Ω CL = 50pF 30pF (1) NOTE: 1. CL includes probes and jig capacitance. For B-Port outputs, CL = 30pF is used for worst case edge rate. NOTE: 1. CL includes probes and jig capacitance. Test Circuit for A Outputs(1) Test Circuit for B Outputs(1) SWITCH POSITION tW Test Switch tPLH / tPHL Open tPHZ / tPZH GND tPLZ / tPZL 6V 3V (1) INPUT Vm V Vm V 0V NOTE: 1. 1.5V for B-Port GTLP. 1.2V for B-Port GTL. Voltage Waveforms Pulse Duration (Vm = VCC/2 for A-Port, 1V for GTLP B-Port, and 0.8V for GTL B-Port) NOTE: All input pulses have the following characteristics: frequency = 10 MHz, tR = tF = 2 ns, ZO = 50Ω. The outputs are measured one at a time with one transition per measurement. 5 IDT74GTLP306 8-BIT LVTTL/GTLP BUS TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS 3V INPUT (1) Vm V 0V tPHL tPLH 3V (1) Vm V OUTPUT 0V Voltage Waveforms Propagation Delay Times (2) NOTES: 1. 1.5V for B-Port GTLP, 1.2V for B-Port GTL. 2. VM = VCC/2 for A-port, 1V for GTLP B-port, and 0.8V for GTL B-port. OUTPUT CONTROL 3V VCC/2 VCC/2 tPZ OUTPUT WAVEFORM 1 (S AT 6V) L Z 3V VCC/2 tPZH OUTPUT WAVEFORM 2 (S AT GND) 0V tPL VOL + 0.3V VOL tPHZ VCC/2 VOH VOH – 0.3V 0V Voltage Waveforms Enable and Disable Times (A-Port) NOTE: 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. All input pulses have the following characteristics: frequency = 10 MHz, tR = tF = 2 ns, ZO = 50Ω. The outputs are measured one at a time with one transition per measurement. 6 IDT74GTLP306 8-BIT LVTTL/GTLP BUS TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION XX GTLP XX IDT XXX Temp. Range Device Type Package CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 PG Thin Shrink Small Outline Package 306 8-Bit LVTTL/GTLP Bus Transceiver 74 -40°C to +85°C for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 7 for Tech Support: [email protected] (408) 654-6459