CY74FCT16245T TI | Alldatasheet

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Technical content

Features

  • FCT-E speed at 3.2 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
  • VCC = 5V– 10% CY74FCT16245T Features:
  • 64 mA sink current, 32 mA source current
  • Typical VOLP (ground bounce)<1.0V at VCC = 5V, TA = 25˚C CY74FCT162245T Features:
  • Balanced output drivers: 24 mA
  • Reduced system switching noise
  • Typical VOLP (ground bounce) <0.6V at VCC = 5V, TA = 25˚C CY74FCT162H245T Features:
  • Bus hold on data inputs
  • Eliminates the need for external pull-up or pull-down resistors Functional Description These 16-bit transceivers are designed for use in bidirectional synchronous communication between two buses, where high speed and low power are required. With the exception of the CY74FCT16245T, these devices can be operated either as two independent octals or a single 16-bit transceiver. Direction of data flow is controlled by (DIR), the Output Enable ( OE) transfers data when LOW and isolates the buses when HIGH. The output buffers are designed with power off disable capa- bility to allow for live insertion of boards. The CY74FCT16245T is ideally suited for driving high-capacitance loads and low-impedance backplanes. The CY74FCT162245T has 24-mA balanced output drivers with current limiting resistors in the outputs. This reduces the need for external terminating resistors and provides for mini- mal undershoot and reduced ground bounce. The CY74FCT162245T is ideal for driving transmission lines. The CY74FCT162H245T is a 24-mA balanced output part that has bus hold on the data inputs. The device retains the input’s last state whenever the input goes to high impedance. This eliminates the need for pull-up/down resistors and prevents floating inputs. GND Logic Block Diagrams CY74FCT16245T,CY74FCT162245T, CY74FCT162H245T PinConfiguration 1DIR SSOP/TSSOP Top View 1B1 1B2 1B3 1B4 1A1 1A2 1A3 1A4 1OE GND GND VCC 1B7 1B8 1B5 1B6 1A5 1A6 1A7 1A8 VCC GND GND 2B3 2B4 2B1 2B2 2A1 2A2 2A3 2A4 GND GND VCC 2B7 2B8 2B5 2B6 2A5 2A6 2A7 2A8 VCC GND 2DIR 2OE FCT16245–1 1A1 1A2 1A3 1A4 1A5 1A6 1A7 1OE 1B1 1B2 1B3 1B4 1B5 1B6 1B7 1DIR 1A8 1B8 FCT16245–2 2A1 2A2 2A3 2A4 2A5 2A6 2A7 2OE 2B1 2B2 2B3 2B4 2B5 2B6 2B7 2DIR 2A8 2B8 FCT16245–3 16245T 162245T 162H245T

Maximum Ratings [3, 4] (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) Notes: 1. On CY74FCT162H245T these pins have bus hold. 3. 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. 4. Unused inputs must always be connected to an appropriate logic voltage level, preferably either V CC or ground. Pin Description Name Description OE Three-State Output Enable Inputs (Active LOW) DIR Direction Control A Inputs or Three-State Outputs[1] B Inputs or Three-State Outputs[1] Function Table[2] Inputs OutputsOE DIR L L Bus B Data to Bus A L H Bus A Data to Bus B H X High Z State 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.[5] Max. Unit VIH Input HIGH Voltage 2.0 V VIL Input LOW Voltage 0.8 V VH Input Hysteresis[6] 100 mV VIK Input Clamp Diode Voltage VCC =Min., IIN=–18 mA –0.7 –1.2 V IIH Input HIGH Current Standard VCC =Max., VI=V CC –1 mA Bus Hold –100 IIL Input LOW Current Standard VCC =Max., VI=GND –1 mA Bus Hold –100 mA IBBH IBBL Bus Hold Sustain Current on Bus Hold Input[7] VCC =Min. VI=2.0V –50 mA VI=0.8V +50 IBHHO IBHLO Bus Hold Overdrive Current on Bus Hold Input[7]VCC =Max., VI=1.5V TBD 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[8] VCC =Max., VOUT =GND –80 –140 –200 mA IO Output Drive Current[8] VCC =Max., VOUT =2.5V –50 –180 mA IOFF Power-Off Disable VCC =0V, VOUT £4.5V[9] –1 mA

Output Drive Characteristics for CY74FCT16245T Parameter Description Test Conditions Min. Typ.[5] 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 V VCC =Min., IOH =–32 mA 2.0 3.0 V VOL Output LOW Voltage VCC =Min., IOL =64 mA 0.2 0.55 V Output Drive Characteristics for CY74FCT162245T, CY74FCT162H245T Parameter Description Test Conditions Min. Typ.[5] Max. Unit IODL Output LOW Current[8] VCC =5V, VIN=V IH or VIL, VOUT =1.5V 60 115 150 mA IODH Output HIGH Current[8] 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 Notes: 5. Typical values are at VCC =5.0V, TA=+25˚C ambient. 6. This parameter is specified but not tested. 7. Pins with bus hold are described in Pin Description. 8. 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. 9. Tested at +25˚C. Capacitance[6](TA = +25˚C, f = 1.0 MHz) Parameter Description Test Conditions Typ.[5] 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.[5] Max. Unit ICC Quiescent Power Supply CurrentVCC =Max. VIN<0.2V, VIN>V CC -0.2V 5 500 mA DICC Quiescent Power Supply Current (TTL inputs HIGH) VCC =Max. VIN=3.4V[10] 0.5 1.5 mA ICCD Dynamic Power Supply Current [11] VCC =Max., One Input Toggling, 50% Duty Cycle, Outputs Open, OE=DIR=GND VIN=V CC or VIN=GND 60 100 mA/MHz IC Total Power Supply Current[12] VCC =Max., f1=10 MHz, 50% Duty Cycle, Outputs Open, One Bit Toggling, OE=DIR=GND VIN=V CC or VIN=GND 0.6 1.5 mA VIN=3.4V or VIN=GND 0.9 2.3 mA VCC =Max., f1=2.5 MHz, 50% Duty Cycle, Outputs Open, Sixteen Bits Toggling, OE=DIR=GND VIN=V CC or VIN=GND 2.4 4.5[13] mA VIN=3.4V or VIN=GND 6.4 16.5[13] mA Notes: 10. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND. 11. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. 12. IC =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. 13. Values for these conditions are examples of the ICC formula. These limits are specified but not tested.

Switching CharacteristicsOver the Operating Range[14]

Description

74FCT162H245AT Fig. tPLH tPHL Propagation Delay Data to Output A to B, B to A 1.5 7.0 1.5 4.5 ns 1, 3 tPZH tPZL Output Enable Time OE to A or B 1.5 9.5 1.5 6.2 ns 1, 7, 8 tPHZ tPLZ Output Disable Time OE to A or B 1.5 7.5 1.5 5.0 ns 1, 7, 8 tPZH tPZL Output Enable Time DIR to A or B 1.5 9.5 1.5 6.2 ns 1, 7, 8 tPHZ tPLZ Output Disable Time DIR to A or B 1.5 7.5 1.5 5.0 ns 1, 7, 8 tSK(O) Output Skew[16] 0.5 0.5 ns — 74FCT162H245ET Fig. tPLH tPHL Propagation Delay Data to Output A to B, B to A 1.5 4.1 1.5 3.2 ns 1, 3 tPZH tPZL Output Enable Time OE to A or B 1.5 5.8 1.5 4.4 ns 1, 7, 8 tPHZ tPLZ Output Disable Time OE to A or B 1.5 4.8 1.5 4.0 ns 1, 7, 8 tPZH tPZL Output Enable Time DIR to A or B 1.5 5.8 1.5 4.8 ns 1, 7, 8 tPHZ tPLZ Output Disable Time DIR to A or B 1.5 4.8 1.5 4.0 ns 1, 7, 8 tSK(O) Output Skew[16] 0.5 0.5 ns — Note: 14. Minimum limits are specified but not tested on Propagation Delays. 15. See “Parameter Measurement Information” in the General Information section. 16. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design. Speed (ns) Ordering Code Package Name Package Type Operating Range

3.2 CY74FCT16245ETPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT16245ETPVC/PVCT O48 48-Lead (300-Mil) SSOP

4.1 CY74FCT16245CTPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT16245CTPVC/PVCT O48 48-Lead (300-Mil) SSOP

4.5 CY74FCT16245ATPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT16245ATPVC/PVCT O48 48-Lead (300-Mil) SSOP

7.0 CY74FCT16245TPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT16245TPVC/PVCT O48 48-Lead (300-Mil) SSOP

(ns) Ordering Code Package Name Package Type Operating Range 3.2 74FCT162245ETPACT Z48 48-Lead (240-Mil) TSSOP Industrial CY74FCT162245ETPVC O48 48-Lead (300-Mil) SSOP 74FCT162245ETPVCT O48 48-Lead (300-Mil) SSOP

4.1 CY74FCT162245CTPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT162245CTPVC O48 48-Lead (300-Mil) SSOP 74FCT162245CTPVCT O48 48-Lead (300-Mil) SSOP 4.5 74FCT162245ATPACT Z48 48-Lead (240-Mil) TSSOP Industrial CY74FCT162245ATPVC O48 48-Lead (300-Mil) SSOP 74FCT162245ATPVCT O48 48-Lead (300-Mil) SSOP

7.0 CY74FCT162245TPACT Z48 48-Lead (240-Mil) TSSOP Industrial

CY74FCT162245TPVC/PVCT O48 48-Lead (300-Mil) SSOP Speed (ns) Ordering Code Package Name Package Type Operating Range 3.2 74FCT162H245ETPACT Z48 48-Lead (240-Mil) TSSOP Industrial CY74FCT162H245ETPVC O48 48-Lead (300-Mil) SSOP 74FCT162H245ETPVCT O48 48-Lead (300-Mil) SSOP 4.1 74FCT162H245CTPACT Z48 48-Lead (240-Mil) TSSOP Industrial CY74FCT162H245CTPVC O48 48-Lead (300-Mil) SSOP 74FCT162H245CTPVCT O48 48-Lead (300-Mil) SSOP 4.5 74FCT162H245ATPACT Z48 48-Lead (240-Mil) TSSOP Industrial CY74FCT162H245ATPVC O48 48-Lead (300-Mil) SSOP 74FCT162H245ATPVCT O48 48-Lead (300-Mil) SSOP

48-Lead Shrunk Small Outline PackageO48

48-Lead Thin Shrunk Small Outline PackageZ48

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