fax id: 7046 2500T CY74FCT16500T CY74FCT162500T 18-Bit Registered Transceiver Features Functional Description * Low power, pin compatible replacement for ABT functions * FCT-C speed at 4.6 ns * Power-off disable outputs permits live insertion * Edge-rate control circuitry for significantly improved noise characteristics * Typical output skew < 250 ps * ESD > 2000V * TSSOP (19.6-mil pitch) and SSOP (25-mil pitch) packages * Industrial temperature range of -40C to +85C * VCC = 5V 10% These 18-bit universal bus transceivers can be operated in transparent, latched, or clock modes by combining D-type latches and D-type flip-flops. Data flow in each direction is controlled by output-enable (OEAB and OEBA), latch enable (LEAB and LEBA), and clock inputs (CLKAB and CLKBA) inputs. For A-to-B data flow, the device operates in transparent mode when LEAB is HIGH. When LEAB is LOW, the A data is latched if CLKAB is held at a HIGH or LOW logic level. If LEAB is LOW, the A bus data is stored in the latch/flip-flop on the HIGH-to-LOW transition of CLKAB. OEAB performs the output enable function on the B port. Data flow from B-to-A is similar to that of A-to-B and is controlled by OEBA, LEBA, and CLKBA. The output buffers are designed with power-off disable feature that allows live insertion of boards. CY74FCT16500T Features: * 64 mA sink current, 32 mA source current * Typical VOLP (ground bounce) <1.0V at VCC = 5V, TA = 25C The CY74FCT16500T is ideally suited for driving high-capacitance loads and low-impedance backplanes. The CY74FCT162500T has 24-mA balanced output drivers with current limiting resistors in the outputs. This reduces the need for external terminating resistors and provides for minimal undershoot and reduced ground bounce. The CY74FCT162500T is ideal for driving transmission lines. CY74FCT162500T Features: * Balanced 24 mA output drivers * Reduced system switching noise * Typical VOLP (ground bounce) <0.6V at VCC = 5V, TA= 25C Logic Block Diagram Pin Configuration SSOP/TSSOP Top View OEAB LEAB 1 56 2 55 GND CLKAB A1 3 54 B1 GND 4 53 GND A2 5 52 B2 A3 6 51 B3 VCC A4 7 50 49 VCC B4 OEBA 8 A5 9 48 B5 CLKAB A6 10 47 B6 GND 11 46 GND A7 12 13 45 B7 44 B8 A9 A 10 14 43 B9 15 42 B10 A 11 16 41 B11 A 12 17 40 B12 GND 18 39 OEAB CLKBA LEBA LEAB C A8 C B1 D A1 D C C A 13 19 38 GND B13 D D A 14 20 37 B14 A 15 21 36 B15 VCC 22 35 VCC A 16 A 17 23 34 B16 24 25 33 B17 32 GND 26 31 B18 27 30 CLKBA 28 29 GND TO 17 OTHER CHANNELS FCT16500-1 GND A 18 OEBA LEBA FCT16500-2 Cypress Semiconductor Corporation * 3901 North First Street * San Jose * CA 95134 * 408-943-2600 August 1994 - Revised October 30, 1997 CY74FCT16500T CY74FCT162500T Maximum Ratings[5, 6] Pin Summary Name (Above which the useful life may be impaired. For user guidelines, not tested.) Description OEAB A-to-B Output Enable Input OEBA B-to-A Output Enable Input (Active LOW) LEAB A-to-B Latch Enable Input Ambient Temperature with Power Applied....................................Com'l -55C to +125C LEBA B-to-A Latch Enable Input DC Input Voltage ................................................. -0.5V to +7.0V CLKAB A-to-B Clock Input (Active LOW) DC Output Voltage .............................................. -0.5V to +7.0V CLKBA B-to-A Clock Input (Active LOW) A A-to-B Data Inputs or B-to-A Three-State Outputs DC Output Current (Maximum Sink Current/Pin) ........................... -60 to +120 mA B B-to-A Data Inputs or A-to-B Three-State Outputs Function Table Storage Temperature ....................... Com'l -55C to +125C Power Dissipation .......................................................... 1.0W Static Discharge Voltage ........................................... >2001V (per MIL-STD-883, Method 3015) [1, 2] Inputs Operating Range Outputs OEAB LEAB CLKAB A B L X X X Z H H X L L H H X H H H L L L H L H H H L H X B[3] H L L X B[4] Range Industrial Ambient Temperature VCC -40C to +85C 5V 10% Electrical Characteristics Over the Operating Range Parameter Description VIH Input HIGH Voltage VIL Input LOW Voltage Test Conditions Min. Typ.[7] Max. 2.0 V 0.8 [8] VH Input Hysteresis VIK Input Clamp Diode Voltage VCC=Min., IIN=-18 mA IIH Input HIGH Current IIL Input LOW Current IOZH Unit 100 mV -1.2 V VCC=Max., VI=VCC 1 A VCC=Max., VI=GND. 1 A High Impedance Output Current (Three-State Output pins) VCC=Max., VOUT=2.7V 1 A IOZL High Impedance Output Current (Three-State Output pins) VCC=Max., VOUT=0.5V 1 A IOS Short Circuit Current[9] VCC=Max., VOUT=GND -80 -200 mA IO Output Drive Current[9] VCC=Max., VOUT=2.5V -50 -180 mA Power-Off Disable VCC=0V, VOUT4.5V 1 A IOFF [10] -0.7 V -140 Notes: 1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don't Care. Z = HIGH Impedance. = HIGH-to-LOW Transition. 2. A-to-B data flow is shown, B-to-A data flow is similar but uses OEBA, LEBA, and CLKBA. 3. Output level before the indicated steady-state input conditions were established. 4. Output level before the indicated steady-state input conditions were established, provided that CLKAB was LOW before LEAB went LOW. 5. Operation beyond the limits set forth may impair the useful life of the device. Unless otherwise noted, these limits are over the operating free-air temperature range. 6. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground. 7. Typical values are at VCC= 5.0V, TA= +25C ambient. 8. This parameter is guaranteed but not tested. 9. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter tests, I OS tests should be performed last. 10. Tested at +25C. 2 CY74FCT16500T CY74FCT162500T Output Drive Characteristics for CY74FCT16500T Parameter VOH VOL Min. Typ.[7] VCC=Min., IOH=-3 mA 2.5 3.5 VCC=Min., IOH=-15 mA 2.4 3.5 VCC=Min., IOH=-32 mA 2.0 3.0 Description Output HIGH Voltage Output LOW Voltage Test Conditions VCC=Min., IOL=64 mA Max. Unit V 0.2 0.55 V Typ.[7] Max. Unit Output Drive Characteristics for CY74FCT162500T Parameter Description [9] Test Conditions Min. IODL Output LOW Current VCC=5V, VIN=VIH or VIL, VOUT=1.5V 60 115 150 mA IODH Output HIGH Current[9] VCC=5V, VIN=VIH or VIL, VOUT=1.5V -60 -115 -150 mA VOH Output HIGH Voltage VCC=Min., IOH=-24 mA 2.4 3.3 VOL Output LOW Voltage VCC=Min., IOL=24 mA V 0.3 0.55 V Typ.[7] Capacitance[8] (TA = +25C, f = 1.0 MHz) Parameter Description Test Conditions Max. Unit CIN Input Capacitance VIN = 0V 4.5 6.0 pF COUT Output Capacitance VOUT = 0V 5.5 8.0 pF Power Supply Characteristics Parameter Description Test Conditions Typ.[7] Max. Unit 5 500 A 0.5 1.5 mA ICC Quiescent Power Supply Current VCC=Max. VIN0.2V, VINVCC-0.2V ICC Quiescent Power Supply Current (TTL inputs HIGH) VCC=Max. VIN=3.4V[11] ICCD Dynamic Power Supply Current[12] VCC=Max., One Input Toggling, VIN=VCC or 50% Duty Cycle, Outputs Open, VIN=GND OEAB=OEBA=VCC or GND 75 120 A/MHz IC Total Power Supply Current[13] VCC=Max., f0=10 MHz (CLKAB), f1=5 MHz, 50% Duty Cycle, Outputs Open, One Bit Toggling, OEAB=OEBA=VCC LEAB=GND VIN=VCC or VIN=GND 0.8 1.7 mA VIN=3.4V or VIN=GND 1.3 3.2 mA VCC=Max., f0=10 MHz, f1=2.5 MHz, 50% Duty Cycle, Outputs Open, Eighteen Bits Toggling, OEAB=OEBA=VCC LEAB=GND VIN=VCC or VIN=GND 3.8 6.5[14] mA VIN=3.4V or VIN=GND 8.5 20.8[14] mA Notes: 11. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND. 12. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. 13. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC+ICCDHNT +ICCD(f0/2 + f1N1) ICC = Quiescent Current with CMOS input levels 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) f0 = Clock frequency for registered devices, otherwise zero f1 = Input signal frequency N1 = Number of inputs changing at f1 All currents are in milliamps and all frequencies are in megahertz. 14. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested. 3 CY74FCT16500T CY74FCT162500T Switching Characteristics Over the Operating Range[15] CY74FCT16500AT/ CY74FCT16500CT/ CY74FCT162500AT CY74FCT162500CT Parameter Description Min. Max. Min. 150 Max. Unit 150 MHz Fig. No.[16] fMAX CLKAB or CLKBA frequency tPLH tPHL Propagation Delay A to B or B to A 1.5 5.1 1.5 4.6 ns 1, 3 tPLH tPHL Propagation Delay LEBA to A, LEAB to B 1.5 5.6 1.5 5.3 ns 1, 5 tPLH tPHL Propagation Delay CLKBA to A, CLKAB to B 1.5 5.6 1.5 5.3 ns 1, 5 tPZH tPZL Output Enable Time OEBA to A, OEAB to B 1.5 6.0 1.5 5.4 ns 1, 7, 8 tPHZ tPLZ Output Disable Time OEBA to A, OEAB to B 1.5 5.6 1.5 5.2 ns 1, 7, 8 tSU Set-Up Time, HIGH or LOW A to CLKAB, B to CLKBA 3.0 3.0 ns 9 tH Hold Time, HIGH or LOW A to CLKAB, B to CLKBA 0 0 ns 9 tSU Set-Up Time, HIGH or LOW A to LEAB, B to LEBA Clock HIGH 3.0 3.0 ns 4 Clock LOW 1.5 1.5 ns 4 tH Hold Time, HIGH or LOW A to LEAB, B to LEBA 1.5 1.5 ns 4 tW LEAB or LEBA Pulse Width HIGH 3.0 2.5 ns 5 tW CLKAB or CLKBA Pulse Width HIGH or LOW 3.0 3.0 ns 5 tSK(O) Output Skew [17] 0.5 0.5 ns Ordering Information CY74FCT16500T Speed (ns) 4.6 5.1 Ordering Code Package Name Package Type CY74FCT16500CTPAC Z56 56-Lead (240-Mil) TSSOP CY74FCT16500CTPVC O56 56-Lead (300-Mil) SSOP CY74FCT16500ATPAC Z56 56-Lead (240-Mil) TSSOP CY74FCT16500ATPVC O56 56-Lead (300-Mil) SSOP Operating Range Industrial Industrial Ordering Information CY74FCT162500T Speed (ns) 4.6 5.1 Ordering Code Package Name Package Type CY74FCT162500CTPAC Z56 56-Lead (240-Mil) TSSOP CY74FCT162500CTPVC O56 56-Lead (300-Mil) SSOP CY74FCT162500ATPAC Z56 56-Lead (240-Mil) TSSOP CY74FCT162500ATPVC O56 56-Lead (300-Mil) SSOP Notes: 15. Minimum limits are guaranteed but not tested on Propagation Delays. 16. See "Parameter Measurement Information" in the General Information section. 17. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design. Document #: 38-00381-B 4 Operating Range Industrial Industrial CY74FCT16500T CY74FCT162500T Package Diagrams 56-Lead Shrunk Small Outline Package O56 56-Lead Thin Shrunk Small Outline Package Z56 (c) Cypress Semiconductor Corporation, 1997. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.