IDT74FCT16260AT/CT/ET FAST CMOS 12-BIT TRI-PORT BUS EXCHANGER INDUSTRIAL TEMPERATURE RANGE FAST CMOS 12-BIT TRI-PORT BUS EXCHANGER IDT74FCT16260AT/CT/ET FEATURES: DESCRIPTION: • • • • • The FCT16260T Tri-Port Bus Exchangers are high-speed 12-bit latched bus multiplexers/transceivers for use in high-speed microprocessor applications. These Bus Exchangers support memory interleaving with latched outputs on the B ports and address multiplexing with latched inputs on the B ports. The Tri-Port Bus Exchanger has three 12-bit ports. Data may be transferred between the A port and either/both of the B ports. The latch enable (LE1B, LE2B, LEA1B and LEA2B) inputs control data storage. When a latch-enable input is high, the latch is transparent. When a latch-enable input is low, the data at the input is latched and remains latched until the latch enable input is returned high. Independent output enables (OE1B and OE2B) allow reading from one port while writing to the other port. The FCT16260T is ideally suited for driving high capacitance loads and low impedance backplanes. The output buffers are designed with power off disable capability to allow "live insertion" of boards when used as backplane drivers. • • • • • • 0.5 MICRON CMOS Technology High-speed, low-power CMOS replacement for ABT functions Typical tSK(o) (Output Skew) < 250ps Low input and output leakage ≤ 1µA (max.) ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) VCC = 5V ±10% High drive outputs (–32mA IOH, 64mA IOL) Power off disable outputs permit “live insertion” Typical VOLP (Output Ground Bounce) < 1.0V at VCC = 5V, TA = 25°C Power off disable outputs permit “live insertion” Available in SSOP and TSSOP packages FUNCTIONAL BLOCK DIAGRAM 29 OE1B 30 LEA1B A-1B LATC H 1B 1:12 12 2 LE1B 1B-A LATC H 12 SEL 12 12 28 1 OEA A 1:12 12 M1 U X 0 12 12 2B-A LATC H 27 LE2B A-2B LATC H 55 LEA2B 12 12 2B 1:12 56 OE2B The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE JANUARY 2002 1 © 2002 Integrated Device Technology, Inc. DSC-5431/2 IDT74FCT16260AT/CT/ET FAST CMOS 12-BIT TRI-PORT BUS EXCHANGER INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION OEA LE1B 1 2 56 55 OE2B LEA2B Symbol Description Max Unit VTERM(2) Terminal Voltage with Respect to GND –0.5 to 7 V VTERM(3) Terminal Voltage with Respect to GND –0.5 to VCC+0.5 V TSTG Storage Temperature –65 to +150 °C IOUT DC Output Current –60 to +120 mA 2B 3 3 54 2B 4 GND 4 53 GND 2B 2 5 52 2B 5 2B 1 6 51 2B 6 V CC 7 50 V CC A1 8 49 2B 7 A2 9 48 2B 8 A3 10 47 2B 9 GND 11 46 GND Symbol A4 12 45 2B 10 CIN Input Capacitance VIN = 0V 3.5 6 pF A5 13 44 2B 11 COUT Output Capacitance VOUT = 0V 3.5 8 pF A6 14 43 2B 12 A7 15 42 1B 12 A8 16 41 1B 11 A9 17 40 1B 10 GND 18 39 GND A 10 19 38 1B 9 A 11 20 37 1B 8 A 12 21 36 1B 7 V CC 22 35 V CC 1B 1 23 34 1B 6 1B 2 24 33 1B 5 GND 25 32 GND 1B 3 26 31 1B 4 LE2B 27 30 LEA1B SEL 28 29 OE1B 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. All device terminals except FCT162XXX Output and I/O terminals. 3. Output and I/O terminals for FCT162XXX. CAPACITANCE (TA = +25°C, F = 1.0MHz) Parameter(1) Conditions Typ. NOTE: 1. This parameter is measured at characterization but not tested. SSOP/ TSSOP TOP VIEW 2 Max. Unit IDT74FCT16260AT/CT/ET FAST CMOS 12-BIT TRI-PORT BUS EXCHANGER INDUSTRIAL TEMPERATURE RANGE PIN DESCRIPTION Signal I/O Description A(1:12) I/O Bidirectional Data Port A. Usually connected to the CPU's Address/Data bus. 1B(1:12) I/O Bidirectional Data Port 1B. Connected to the even path or even bank of memory. 2B(1:12) I/O LEA1B I Latch Enable Input for A-1B Latch. The Latch is open when LEA1B is HIGH. Data from the A-port is latched on the HIGH to LOW transition of LEA1B. Bidirectional Data Port 2B. Connected to the odd path or odd bank of memory. LEA2B I Latch Enable Input for A-2B Latch. The Latch is open when LEA2B is HIGH. Data from the A-Port is latched on the HIGH to LOW transition of LEA2B. LE1B I Latch Enable Input for the 1B-A Latch. The Latch is open when LE1B is HIGH. Data from the 1B port is latched on the HIGH to LOW transition of LE1B. LE2B I Latch Enable Input for the 2B-A Latch. The Latch is open when LE2B is HIGH. Data from the 2B port is latched on the HIGH to LOW transition of LE2B. SEL I 1B or 2B Path Selection. When HIGH, SEL enables data transfer from 1B Port to A Port. When LOW, SEL enables data transfer from 2B Port to A Port. OEA I Output Enable for A Port (Active LOW) OE1B I Output Enable for 1B Port (Active LOW) OE2B I Output Enable for 2B Port (Active LOW) FUNCTION TABLES(1) Inputs LE1B H H L X X X X 1B H L X X X X X 2B X X X H L X X SEL H H H L L L X A H L H L H L X X X X X LEA1B H H H H L L L X X X X Inputs LEA2B H H L L H H L X X X X LE2B X X X H H L X OEA L L L L L L H Output A H L A(1) H L A(1) Z Outputs OE1B L L L L L L L H L H L OE2B L L L L L L L H H L L 1B H L H L B(1) B(1) B(1) Z Active Z Active 2B H L B(1) B(1) H L B(1) Z Z Active Active NOTES: 1. Output level before the indicated steady-state input conditions were established. 2. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High-Impedance 3 IDT74FCT16260AT/CT/ET FAST CMOS 12-BIT TRI-PORT BUS EXCHANGER INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VCC = 5.0V ±10% Symbol Test Conditions(1) Parameter Min. Typ.(2) Max. Unit VIH Input HIGH Level Guaranteed Logic HIGH Level 2 — — V VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V IIH Input HIGH Current (Input pins)(5) VCC = Max. — — ±1 µA — — ±1 — — ±1 — — ±1 VO = 2.7V — — ±1 VO = 0.5V — — ±1 VI = VCC Input HIGH Current (I/O pins)(5) IIL Input LOW Current (Input pins)(5) VI = GND Input LOW Current (I/O pins)(5) IOZH High Impedance Output Current IOZL (3-State Output pins)(5) VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V IOS Short Circuit Current VCC = Max., VO = GND(3) –80 –140 –250 mA VH Input Hysteresis — 100 — mV ICCL ICCH ICCZ Quiescent Power Supply Current — 5 500 µA VCC = Max. — VCC = Max. VIN = GND or VCC µA OUTPUT DRIVE CHARACTERISTICS Symbol IO VOH Parameter Output Drive Current Output HIGH Voltage VOL Output LOW Voltage IOFF Input/Output Power Off Leakage(5) Test Conditions(1) Min. Typ.(2) Max. VCC = Max., VO = 2.5V(3) VCC = Min. IOH = –3mA VIN = VIH or VIL IOH = –15mA IOH = –32mA(4) VCC = Min. IOL = 64mA VIN = VIH or VIL –50 2.5 2.4 2 — — 3.5 3.5 3 0.2 –180 — — — 0.55 mA VCC = 0V, VIN or VO ≤ 4.5V — — ±1 µA NOTES: 1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25°C ambient. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. Duration of the condition can not exceed one second. 5. The test limit for this parameter is ±5µA at TA = –55°C. 4 Unit V V IDT74FCT16260AT/CT/ET FAST CMOS 12-BIT TRI-PORT BUS EXCHANGER INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Test Conditions(1) Symbol Parameter ∆ICC Quiescent Power Supply Current TTL Inputs HIGH VCC = Max. VIN = 3.4V(3) ICCD Dynamic Power Supply Current(4) VCC = Max. Outputs Open One Output Port Enabled LExx = VCC One Input Bit Togging One Output Bit Toggling 50% Duty Cycle VCC = Max. Outputs Open fi = 10MHz 50% Duty Cycle One Output Port Enabled LExx = VCC One Input Bit Toggling One Output Bit Toggling VCC = Max. Outputs Open fi = 2.5MHz 50% Duty Cycle One Output Port Enabled LExx = VCC Twelve Input Bits Toggling Twelve Output Bits Toggling IC Total Power Supply Current(6) Min. Typ.(2) Max. Unit — 0.5 1.5 mA VIN = VCC VIN = GND — 60 100 µA/ MHz VIN = VCC VIN = GND — 0.6 1.5 mA VIN = 3.4V VIN = GND — 0.9 2.3 VIN = VCC VIN = GND — 1.8 3.5(5) VIN = 3.4V VIN = GND — 4.8 12.5(5) NOTES: 1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25°C ambient. 3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ∆ICC DHNT + ICCD (fCPNCP/2 + fiNi) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V). DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) NCP = Number of Clock Inputs at fCP fi = Input Frequency Ni = Number of Inputs at fi 5 IDT74FCT16260AT/CT/ET FAST CMOS 12-BIT TRI-PORT BUS EXCHANGER INDUSTRIAL TEMPERATURE RANGE SWITCHING CHARACTERISTICS OVER OPERATING RANGE FCT16260AT Symbol Parameter Max. Min.(2) Max. Min.(2) Max. Unit 1.5 5.2 1.5 4.7 1.5 3.6 ns 1.5 5.6 1.5 5 1.5 3.6 ns 1.5 5.2 1.5 4.7 1.5 4 ns 1.5 4.7 1.5 4.4 1.5 4 ns 1.5 5.2 1.5 4.7 1.5 4 ns Propagation Delay CL = 50pF tPHL Ax to 1Bx or Ax to 2Bx RL = 500Ω tPLH Propagation Delay 1Bx to Ax or 2Bx to Ax tPLH Propagation Delay tPHL LExB to Ax tPLH Propagation Delay tPHL LEA1B to 1Bx or LEA2B to 2Bx FCT16260ET Min.(2) tPLH tPHL FCT16260CT Condition(1) tPLH Propagation Delay tPHL SEL to Ax tPZH tPZL Output Enable Time OEA to Ax, OE1B to 1Bx, or OE2B to 2Bx 1.5 5.7 1.5 5.1 1.5 4.4 ns tPHZ tPLZ Output Disable Time OEA to Ax, OE1B to 1Bx, or OE2B to 2Bx 1.5 4.4 1.5 4 1.5 4 ns tSU Set-up Time HIGH or LOW Data to Latch 1.5 — 1 — 1 — ns tH Hold Time, Latch to Data 1 — 1 — 1 — ns tW Pulse Width, Latch HIGH (4) 3 — 3 — 3 — ns Output Skew(3) — 0.5 — 0.5 — 0.5 ns tSK(o) NOTES: 1. See test circuits and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design. 4. This parameter is guaranteed but not tested. 6 IDT74FCT16260AT/CT/ET FAST CMOS 12-BIT TRI-PORT BUS EXCHANGER INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS V CC SWITCH POSITION 7.0V 500 Ω Pulse Generator D.U.T. 50pF RT Switch Closed All Other Tests Open DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. V OU T V IN Test Open Drain Disable Low Enable Low 500 Ω CL Test Circuits for All Outputs DATA INPUT tH t SU TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. tRE M t SU 3V 1.5V 0V 3V 1.5V 0V LOW -HIGH-LOW PULSE 1.5V tW 3V 1.5V 0V HIGH-LOW -HIGH PULSE 1.5V 3V 1.5V 0V tH Pulse Width Set-up, Hold, and Release Times ENAB LE SAME PHASE INPUT TRANSITION tPLH t PHL OUTPUT t PLH OPPOSITE PHASE INPUT TRANSITION t PHL 3V 1.5V 0V DISABLE 3V CONTROL INPUT 1.5V OUTPUT NORM ALLY LOW 3V 1.5V 0V SW ITCH CLOSED 3.5V 1.5V SW ITCH OPEN 3.5V 0.3V t PZH OUTPUT NORM ALLY HIGH 0V t PLZ tPZL V OH 1.5V V OL V OL tPHZ 0.3V V OH 1.5V 0V 0V Propagation Delay Enable and Disable Times NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. 2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns. 7 IDT74FCT16260AT/CT/ET FAST CMOS 12-BIT TRI-PORT BUS EXCHANGER INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XX Temp. Range FCT XXX XXXX XX Family Device Type Package PV PA Shrink Small Outline Package Thin Shrink Small Outline Package 206AT 206CT 206ET 12-Bit Tri-Port Bus Exchanger 16 Double-Density, 5 Volt, Balanced Drive 74 – 40°C to +85°C DATA SHEET DOCUMENT HISTORY 1/21/2002 Removed Military temp grade CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 8 for Tech Support: [email protected] (408) 654-6459