fax id: 7041 445T/2 CY74FCT16245T/2245T CY74FCT16445T/2H245T 16-Bit Transceiver Features * Low power, pin-compatible replacement for ABT functions * 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 -40C to +85C * VCC = 5V 10% CY74FCT16245T Features: * 64 mA sink current, 32 mA source current * Typical VOLP (ground bounce)<1.0V at VCC = 5V, TA = 25C CY74FCT162245T Features: * Balanced output drivers: 24 mA * Reduced system switching noise * Typical VOLP (ground bounce) <0.6V at VCC = 5V, TA= 25C CY74FCT16445T Features: * 64 mA sink current, 32 mA source current * Reduces system loading 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 capability 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 minimal undershoot and reduced ground bounce. The CY74FCT162245T is ideal for driving transmission lines. The CY74FCT16445T is designed for 16-bit operation, reducing control lines from two OE and two DIR pins to one OE and one DIR pin to reduce loading. 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. Logic Block Diagrams CY74FCT16245T,CY74FCT162245T, CY74FCT162H245T 1 DIR Pin Configuration SSOP/TSSOP Top View 2 DIR 1OE 2 OE 1A1 1DIR 1 48 1 OE 1 B1 2 3 47 46 1 A2 GND 1 B3 4 5 45 44 GND 1 A3 1 B4 VCC 1 B5 6 2 B2 2 B3 GND 2 A1 1 B2 1B1 2 B1 1A2 2 A2 1B2 1A3 2 A3 1A4 2 A4 1B4 2 B4 1A5 1B5 2 B5 2 A6 1B6 2 B6 1A7 2 A7 1B7 2 B7 1A8 2 A8 1B8 2 B8 FCT16245-1 Cypress Semiconductor Corporation FCT16245-2 * 3901 North First Street 1 A4 VCC 1 A5 GND 1 B7 11 38 1 A7 1 B8 12 13 37 36 1 A8 14 15 35 34 2 A2 16 33 GND 2 A3 2 B4 VCC 2 B5 17 32 2 A4 18 31 19 30 VCC 2 A5 2 B1 2 B2 2 A5 1A6 43 7 16245T 42 8 162245T 41 162H2455T 9 40 10 39 1 B6 1B3 * San Jose 1 A1 GND 2 B3 1 A6 2 A1 2 B6 20 29 2 A6 GND 2 B7 21 28 22 27 GND 2 A7 2 B8 23 26 2 A8 2DIR 24 25 2 OE FCT16245-3 * CA 95134 * 408-943-2600 July 1994 - Revised October 30, 1997 CY74FCT16245T/2245T CY74FCT16445T/2H245 Logic Block DiagramCY74FCT16445T Pin Configuration SSOP/TSSOP Top View DIR OE A1 DIR B1 1 48 2 47 OE A1 B2 3 46 A2 GND 4 45 GND B3 5 44 A3 B4 6 43 VCC B5 7 42 8 41 A4 VCC A5 B6 9 40 A6 GND 10 39 GND B7 11 38 A7 B8 37 36 A8 B9 12 13 B10 14 35 A10 GND 15 34 GND B11 16 33 A11 B12 VCC B13 17 32 18 31 19 30 A12 VCC A13 B14 20 29 A14 GND 21 28 GND B15 22 27 A15 B16 NC 23 26 24 25 A16 NC B1 A2 B2 A3 B3 A4 B4 TO OTHER 12 CHANNELS FCT16245-4 16445T A9 FCT16245-5 Maximum Ratings[3, 4] Pin Description Name (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ........................ Com'l -55C to +125C Description OE Three-State Output Enable Inputs (Active LOW) DIR Direction Control A Inputs or Three-State Outputs[1] Ambient Temperature with Power Applied.................................... Com'l -55C to +125C B Inputs or Three-State Outputs[1] DC Input Voltage ............................................-0.5V to +7.0V DC Output Voltage..........................................-0.5V to +7.0V Function Table DC Output Current (Maximum Sink Current/Pin) ........................ -60 to +120 mA [2] Inputs Power Dissipation .......................................................... 1.0W OE DIR Outputs L L Bus B Data to Bus A Static Discharge Voltage ........................................... >2001V (per MIL-STD-883, Method 3015) L H Bus A Data to Bus B Operating Range H X High Z State Range Industrial Ambient Temperature VCC -40C to +85C 5V 10% Notes: 1. On CY74FCT162H245T these pins have bus hold. 2. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don't Care. Z = High Impedance. 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-air temperature range. 4. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground. 2 CY74FCT16245T/2245T CY74FCT16445T/2H245 Electrical Characteristics Over the Operating Range Parameter Description VIH Input HIGH Voltage VIL Input LOW Voltage Test Conditions Min. Typ.[5] 2.0 [6] Input Hysteresis VIK Input Clamp Diode Voltage 100 IIH Input HIGH Current VCC=Min., IIN=-18 mA Standard -0.7 VCC=Max., VI=VCC Standard VCC=Max., VI=GND Bus Hold [7] V mV -1.2 V 1 A 100 Bus Hold Input LOW Current Unit V 0.8 VH IIL Max. IBBH IBBL Bus Hold Sustain Current on Bus Hold Input VCC=Min. VI=2.0V -50 VI=0.8V +50 IBHHO IBHLO Bus Hold Overdrive Current on Bus Hold Input[7] VCC=Max., VI=1.5V IOZH High Impedance Output Current (Three-State Output pins) IOZL IOS 1 A 100 A A TBD mA VCC=Max., VOUT=2.7V 1 A High Impedance Output Current (Three-State Output pins) VCC=Max., VOUT=0.5V 1 A Short Circuit Current[8] VCC=Max., VOUT=GND -80 -200 mA [8] VCC=Max., VOUT=2.5V -50 -180 mA 1 A Max. Unit IO Output Drive Current IOFF Power-Off Disable -140 VCC=0V, VOUT4.5V[9] Output Drive Characteristics for CY74FCT16245T, CY74FCT16445T Parameter VOH VOL Description Output HIGH Voltage Output LOW Voltage Min. Typ.[5] 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 Test Conditions VCC=Min., IOL=64 mA V 0.2 0.55 V Min. Typ.[5] Max. Unit Output Drive Characteristics for CY74FCT162245T, CY74FCT162H245T Parameter IODL Description Output LOW Current Test Conditions [8] VCC=5V, VIN=VIH or VIL, VOUT=1.5V 60 115 150 mA [8] -150 mA IODH Output HIGH Current VCC=5V, VIN=VIH or VIL, VOUT=1.5V -60 -115 VOH Output HIGH Voltage VCC=Min., IOH=-24 mA 2.4 3.3 VOL Output LOW Voltage VCC=Min., IOL=24 mA 0.3 V 0.55 V Notes: 5. Typical values are at VCC=5.0V, TA=+25C ambient. 6. This parameter is guaranteed 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, IOS tests should be performed last. 9. Tested at +25C. 3 CY74FCT16245T/2245T CY74FCT16445T/2H245 Capacitance[6] (TA = +25C, f = 1.0 MHz) Parameter Description Test Conditions Typ.[5] Max. Unit CIN Input Capacitance VIN = 0V 4.5 6.0 pF COUT Output Capacitance VOUT = 0V 5.5 8.0 pF Typ.[5] Max. Unit 5 500 A 0.5 1.5 mA Power Supply Characteristics Parameter Description Test Conditions ICC Quiescent Power Supply Current VCC=Max. VIN<0.2V, VIN>VCC-0.2V ICC Quiescent Power Supply Current VCC=Max. (TTL inputs HIGH) VIN=3.4V[10] ICCD Dynamic Power Supply Current[11] VCC=Max., One Input Toggling, VIN=VCC or 50% Duty Cycle, Outputs Open, VIN=GND OE=DIR=GND 60 100 A/MHz IC Total Power Supply Current[12] VCC=Max., f1=10 MHz, VIN=VCC or 50% Duty Cycle, Outputs Open, VIN=GND One Bit Toggling, VIN=3.4V or OE=DIR=GND VIN=GND 0.6 1.5 mA 0.9 2.3 mA VCC=Max., f1=2.5 MHz, 50% Duty Cycle, Outputs Open, Sixteen Bits Toggling, OE=DIR=GND VIN=VCC 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. = IQUIESCENT + IINPUTS + IDYNAMIC 12. IC 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 = Input signal frequency f1 N1 = 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 guaranteed but not tested. 4 CY74FCT16245T/2245T CY74FCT16445T/2H245 ] Switching Characteristics Over the Operating Range[14] Parameter Description 74FCT16245T 74FCT162245T 74FCT16445T 74FCT162H245T 74FCT16245AT 74FCT162245AT 74FCT16445AT 74FCT162H245AT Min. Max. Min. Max. Unit Fig. No.[15] 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 ns -- 0.5 74FCT16245CT 74FCT162245CT 74FCT16445CT 74FCT162H245CT Parameter Description 74FCT16245ET 74FCT162245ET 74FCT162H245ET Min. Max. Min. Max. Unit Fig. No.[15] 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 ns -- 0.5 Note: 14. Minimum limits are guaranteed 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 guaranteed by design. 5 CY74FCT16245T/2245T CY74FCT16445T/2H245 Ordering Information CY74FCT16245 Speed (ns) 3.2 4.1 4.5 7.0 Ordering Code Package Name Package Type CY74FCT16245ETPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16245ETPVC O48 48-Lead (300-Mil) SSOP CY74FCT16245CTPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16245CTPVC O48 48-Lead (300-Mil) SSOP CY74FCT16245ATPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16245ATPVC O48 48-Lead (300-Mil) SSOP CY74FCT16245TPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16245TPVC O48 48-Lead (300-Mil) SSOP Operating Range Industrial Industrial Industrial Industrial Ordering Information CY74FCT162245 Speed (ns) 3.2 4.1 4.5 7.0 Ordering Code Package Name Package Type CY74FCT162245ETPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162245ETPVC O48 48-Lead (300-Mil) SSOP CY74FCT162245CTPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162245CTPVC O48 48-Lead (300-Mil) SSOP CY74FCT162245ATPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162245ATPVC O48 48-Lead (300-Mil) SSOP CY74FCT162245TPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162245TPVC O48 48-Lead (300-Mil) SSOP Operating Range Industrial Industrial Industrial Industrial Ordering Information CY74FCT16445 Speed (ns) 4.1 4.5 7.0 Ordering Code Package Name Package Type CY74FCT16445CTPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16445CTPVC O48 48-Lead (300-Mil) SSOP CY74FCT16445ATPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16445ATPVC O48 48-Lead (300-Mil) SSOP CY74FCT16445TPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16445TPVC O48 48-Lead (300-Mil) SSOP Operating Range Industrial Industrial Industrial Ordering Information CY74FCT162H245 Speed (ns) 3.2 4.1 4.5 7.0 Ordering Code Package Name Package Type CY74FCT162H245ETPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162H245ETPVC O48 48-Lead (300-Mil) SSOP CY74FCT162H245CTPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162H245CTPVC O48 48-Lead (300-Mil) SSOP CY74FCT162H245ATPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162H245ATPVC O48 48-Lead (300-Mil) SSOP CY74FCT162H245TPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162H245TPVC O48 48-Lead (300-Mil) SSOP Document #: 38-00389-C 6 Operating Range Industrial Industrial Industrial Industrial CY74FCT16245T/2245T CY74FCT16445T/2H245 Package Diagrams 48-Lead Shrunk Small Outline Package O48 48-Lead Thin Shrunk Small Outline Package Z48 (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.