CY74FCT16500T TI | Alldatasheet

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Technical content

Features

  • 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-40˚C to +85˚C CC = 5V– 10% CY74FCT16500T Features:
  • 64 mA sink current, 32 mA source current
  • Typical VOLP (ground bounce) <1.0V at VCC = 5V, TA = 25˚C CY74FCT162500T Features:
  • Balanced 24 mA output drivers
  • Reduced system switching noise
  • Typical V OLP (ground bounce) <0.6V at VCC = 5V, TA = 25˚C Functional Description 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. 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. GND Logic Block Diagram Pin Configuration OEAB SSOP/TSSOP Top View LEAB A 1 A 2 A 3 GND GND GND VCC A 6 A 7 A 4 A 5 VCC GND A 10 A 11 A 8 A 9 B11 B12 GND A 12 VCC A 16 GND A 14 VCC A 15 A 17 FCT16500-1 TO 17 OTHER CHANNELS LEAB OEBA LEBA CLKAB CLKBA OEAB C D C D C D C D A OEBA LEBA GND A 18 CLKAB B10 GND B14 B15 B13 B16 B17 GND B18 CLKBA FCT16500-2

Maximum Ratings [5, 6] (Above which the useful life may be impaired. For user guidelines, not tested.) Ambient Temperature with DC Output Current (per MIL-STD-883, Method 3015) Pin Summary Name Description OEAB A-to-B Output Enable Input OEBA B-to-A Output Enable Input (Active LOW) LEAB A-to-B Latch Enable Input LEBA B-to-A Latch Enable Input CLKAB A-to-B Clock Input (Active LOW) CLKBA B-to-A Clock Input (Active LOW) A A-to-B Data Inputs or B-to-A Three-State Outputs B B-to-A Data Inputs or A-to-B Three-State Outputs Function Table[1, 2] Inputs 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] Operating Range Range Ambient Temperature VCC Industrial -40°C to +85°C 5V – 10% Electrical CharacteristicsOver the Operating Range Parameter Description Test Conditions Min. Typ.[7] Max. Unit VIH Input HIGH Voltage 2.0 V VIL Input LOW Voltage 0.8 V VH Input Hysteresis[8] 100 mV VIK Input Clamp Diode Voltage VCC =Min., IIN=-18 mA -0.7 -1.2 V IIH Input HIGH Current VCC =Max., VI=VCC –1 mA IIL Input LOW Current VCC =Max., VI=GND. –1 mA IOZH High Impedance Output Current (Three-State Output pins) VCC =Max., VOUT =2.7V –1 mA IOZL High Impedance Output Current (Three-State Output pins) VCC =Max., VOUT =0.5V –1 mA IOS Short Circuit Current[9] VCC =Max., VOUT =GND -80 -140 -200 mA IO Output Drive Current[9] VCC =Max., VOUT =2.5V -50 -180 mA IOFF Power-Off Disable VCC =0V, VOUT £4.5V[10] –1 mA Notes: 2. A-to-B data flow is shown, B-to-A data flow is similar but usesOEBA, LEBA, andCLKBA. 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-airtemperature 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= +25˚C ambient. 8. This parameter is specified 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+25˚C.

Output Drive Characteristics for CY74FCT16500T Parameter Description Test Conditions Min. Typ.[7] Max. Unit VOH Output HIGH Voltage VCC =Min., IOH =-3 mA 2.5 3.5 V VCC =Min., IOH =-15 mA 2.4 3.5 VCC =Min., IOH =-32 mA 2.0 3.0 VOL Output LOW Voltage VCC =Min., IOL =64 mA 0.2 0.55 V Output Drive Characteristics for CY74FCT162500T Parameter Description Test Conditions Min. Typ.[7] Max. Unit IODL Output LOW Current[9] VCC =5V, VIN=V IH or VIL, VOUT =1.5V 60 115 150 mA IODH Output HIGH Current[9] VCC =5V, VIN=V IH or VIL, VOUT =1.5V -60 -115 -150 mA VOH Output HIGH Voltage VCC =Min., IOH =-24 mA 2.4 3.3 V VOL Output LOW Voltage VCC =Min., IOL =24 mA 0.3 0.55 V Capacitance[8](TA = +25˚C, f = 1.0 MHz) Parameter Description Test Conditions Typ.[7] Max. Unit C IN Input Capacitance VIN = 0V 4.5 6.0 pF C OUT Output Capacitance VOUT = 0V 5.5 8.0 pF Power Supply Characteristics Parameter Description Test Conditions Typ.[7] Max. Unit ICC Quiescent Power Supply CurrentVCC =Max. VIN£0.2V, VIN‡VCC -0.2V 5 500 mA DICC Quiescent Power Supply Current (TTL inputs HIGH) VCC =Max. VIN=3.4V[11] 0.5 1.5 mA ICCD Dynamic Power Supply Current [12] VCC =Max., One Input Toggling, 50%DutyCycle,Outputs Open, OEAB= OEBA=V CC or GND VIN=VCC or VIN=GND 75 120 mA/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=V CC 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=V CC 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. I C =I QUIESCENT + IINPUTS + IDYNAMIC IC =I CC +DICC D H N T+ICCD (f0/2 + f1N 1) ICC = Quiescent Current with CMOS input levels DICC = Power Supply Current for a TTL HIGH input (VIN=3.4V) D H = Duty Cycle for TTL inputs HIGH N T = 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 N 1 = 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 specified but not tested.

Switching CharacteristicsOver the Operating Range[15] CY74FCT162500AT CY74FCT16500CT/ CY74FCT162500CT Fig. fMAX CLKAB or CLKBA frequency 150 150 MHz 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 toCLKBA 3.0 3.0 ns 9 tH Hold Time, HIGH or LOW A to CLKAB, B toCLKBA 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 Speed (ns) Ordering Code Package Name Package Type Operating Range

4.6 CY74FCT16500CTPACT Z56 56-Lead (240-Mil) TSSOP Industrial

CY74FCT16500CTPVC/PVCT O56 56-Lead (300-Mil) SSOP Speed (ns) Ordering Code Package Name Package Type Operating Range

4.6 CY74FCT162500CTPVC O56 56-Lead (300-Mil) SSOP Industrial

74FCT162500CTPVCT O56 56-Lead (300-Mil) SSOP

5.1 CT74FCT162500ATPVC O56 56-Lead (300-Mil) SSOP Industrial

74FCT162500ATPVCT O56 56-Lead (300-Mil) SSOP Notes: 15. Minimum limits are specified 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 ensured by design.

56-Lead Shrunk Small Outline PackageO56 56-Lead Thin Shrunk Small Outline PackageZ56

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