fax id: 7017 2373T CY74FCT16373T CY74FCT162373T 16-Bit Latch Features * Low power, pin-compatible replacement for ABT functions * FCT-E speed at 3.4 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% CY74FCT16373T Features: * 64 mA sink current, 32 mA source current * Typical VOLP (ground bounce) <1.0V at VCC = 5V, TA = 25C CY74FCT162373T Features: * Balanced 24 mA output drivers * Reduced system switching noise * Typical VOLP (ground bounce) <0.6V at VCC = 5V, TA= 25C Functional Description CY74FCT16373T and CY74FCT162373T are 16-bit D-type latches designed for use in bus applications requiring high speed and low power. These devices can be used as two independent 8-bit latches or as a single 16-bit latch by connecting the Output Enable (OE) and Latch (LE) inputs. Flow-through pinout and small shrink packaging aid in simplifying board layout. The output buffers are designed with power-off disable feature that allows live insertion of boards. The CY74FCT16373T is ideally suited for driving high-capacitance loads and low-impedance backplanes. The CY74FCT162373T 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 CY74FCT162373T is ideal for driving transmission lines. Pin Configuration Logic Block Diagrams SSOP/TSSOP Top View 1OE 1 LE 1D 1 D 1O1 C TO 7 OTHER CHANNELS FCT162373-1 2 OE 1 OE 1 48 1 LE 1 O1 2 47 1 D1 1 O2 3 46 1 D2 GND 4 45 GND 1 O3 5 44 1 D3 1 O4 6 43 1 D4 VCC 1 O5 7 42 8 41 VCC 1 D5 1 O6 9 40 1 D6 GND 10 39 GND 1 O7 11 38 1 D7 1 O8 12 13 37 36 1 D8 GND 14 15 35 34 GND 2 O3 16 33 2 D3 2 O4 17 32 2 D4 VCC 18 31 VCC 2 O5 19 30 2 D5 2 O6 20 29 2 D6 GND 21 28 GND 2 O1 2 O2 2 LE 2D 1 D 2 O1 C TO 7 OTHER CHANNELS 2 D1 2 D2 2 O7 22 27 2 D7 2 O8 23 26 2 D8 2 OE 24 25 2 LE FCT162373-2 FCT162373-3 Cypress Semiconductor Corporation * 3901 North First Street * San Jose * CA 95134 * 408-943-2600 August 1994 - Revised October 30, 1997 CY74FCT16373T CY74FCT162373T Maximum Ratings[2, 3] Pin Description Name Description D Data Inputs LE Latch Enable Inputs (Active HIGH) OE Output Enable Inputs (Active LOW) O Three-State Outputs (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature.......................Com'l -55C to +125C Ambient Temperature with Power Applied..................................Com'l -55C to +125C DC Input Voltage ................................................. -0.5V to +7.0V DC Output Voltage .............................................. -0.5V to +7.0V Function Table[1] Inputs Outputs DC Output Current (Maximum Sink Current/Pin) ........................... -60 to +120 mA D LE OE O Power Dissipation .......................................................... 1.0W H H L H Static Discharge Voltage ........................................... >2001V (per MIL-STD-883, Method 3015) L H L L X L L Q0 X X H Z Operating Range 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.[4] Max. 2.0 V 0.8 [5] 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[6] VCC=Max., VOUT=GND -80 -200 mA [6] -50 -180 mA 1 A Max. Unit IO Output Drive Current VCC=Max., VOUT=2.5V IOFF Power-Off Disable VCC=0V, VOUT4.5V[7] -0.7 V -140 Output Drive Characteristics for CY74FCT16373T Parameter VOH VOL Description Output HIGH Voltage Output LOW Voltage Min. Typ.[4] 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 0.2 V 0.55 V Notes: 1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don't Care. Z = High Impedance. Q0=Previous state of flip-flop. 2. 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. 3. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground. 4. Typical values are at VCC=5.0V, TA= +25C ambient. 5. This parameter is guaranteed but not tested. 6. 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. 7. Tested at +25C. 2 CY74FCT16373T CY74FCT162373T Output Drive Characteristics for CY74FCT162373T Parameter Description [6] Test Conditions Min. Typ.[4] Max. Unit IODL Output LOW Current VCC=5V, VIN=VIH or VIL, VOUT=1.5V 60 115 150 mA IODH Output HIGH Current[6] 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.[4] Max. Unit Capacitance[5] (TA = +25C, f = 1.0 MHz) Parameter Description Test Conditions 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.[4] Max. Unit 5 500 A 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[8] 0.5 1.5 mA ICCD Dynamic Power Supply Current[9] VCC=Max., One Input Toggling, 50% Duty Cycle, Outputs Open, OE=GND VIN=VCC or VIN=GND 60 100 A/MHz IC Total Power Supply Current[10] VCC=Max., f1=10 MHz, 50% Duty Cycle, Outputs Open, One Bit Toggling, OE=GND, LE=VCC VIN=VCC 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, VIN=VCC or 50% Duty Cycle, Outputs VIN=GND Open, Sixteen Bits Toggling, VIN=3.4V or OE=GND, LE=VCC VIN=GND 2.4 4.5[11] mA 6.4 16.5[11] mA Notes: 8. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND. 9. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. 10. 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. 11. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested. 3 CY74FCT16373T CY74FCT162373T Switching Characteristics Over the Operating Range[12] CY74FCT16373T CY74FCT162373T CY74FCT16373AT CY74FCT162373AT Description Min. Max. Min. Max. Unit Fig. No.[13] tPLH tPHL Propagation Delay D to O 1.5 8.0 1.5 5.2 ns 1, 3 tPLH tPHL Propagation Delay LE to O 2.0 13.0 2.0 6.7 ns 1, 5 tPZH tPZL Output Enable Time 1.5 12.0 1.5 6.1 ns 1, 7, 8 tPHZ tPLZ Output Disable Time 1.5 7.5 1.5 5.5 ns 1, 7, 8 tSU Set-Up Time HIGH or LOW, D to LE 2.0 2.0 ns 9 tH Hold Time HIGH or LOW, D to LE 1.5 1.5 ns 9 tW LE Pulse Width HIGH 6.0 3.3 ns 5 ns -- Parameter tSK(O) Output Skew [14] 0.5 CY74FCT16373CT CY74FCT162373CT Parameter Description 0.5 CY74FCT16373ET CY74FCT162373ET Min. Max. Min. Max. Unit Fig. No.[13] tPLH tPHL Propagation Delay D to O 1.5 4.2 1.5 3.4 ns 1, 3 tPLH tPHL Propagation Delay LE to O 2.0 5.5 2.0 3.7 ns 1, 5 tPZH tPZL Output Enable Time 1.5 5.5 1.5 4.4 ns 1, 7, 8 tPHZ tPLZ Output Disable Time 1.5 5.0 1.5 3.6 ns 1, 7, 8 tSU Set-Up Time HIGH or LOW, D to LE 2.0 1.0 ns 9 tH Hold Time HIGH or LOW, D to LE 1.5 1.0 ns 9 tW LE Pulse Width HIGH 3.3 3.0 ns 5 ns -- tSK(O) Output Skew [14] 0.5 0.5 Notes: 12. Minimum limits are guaranteed but not tested on Propagation Delays. 13. See "Parameter Measurement Information" in the General Information section. 14. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design. 4 CY74FCT16373T CY74FCT162373T Ordering Information CY74FCT16373 Speed (ns) 3.4 4.2 5.2 8.0 Ordering Code Package Name Package Type CY74FCT16373ETPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16373ETPVC O48 48-Lead (300-Mil) SSOP CY74FCT16373CTPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16373CTPVC O48 48-Lead (300-Mil) SSOP CY74FCT16373ATPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16373ATPVC O48 48-Lead (300-Mil) SSOP CY74FCT16373TPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT16373TPVC O48 48-Lead (300-Mil) SSOP Operating Range Industrial Industrial Industrial Industrial Ordering Information CY74FCT162373 Speed (ns) 3.4 4.2 5.2 8.0 Ordering Code Package Name Package Type CY74FCT162373ETPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162373ETPVC O48 48-Lead (300-Mil) SSOP CY74FCT162373CTPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162373CTPVC O48 48-Lead (300-Mil) SSOP CY74FCT162373ATPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162373ATPVC O48 48-Lead (300-Mil) SSOP CY74FCT162373TPAC Z48 48-Lead (240-Mil) TSSOP CY74FCT162373TPVC O48 48-Lead (300-Mil) SSOP Document #: 38-00386-C 5 Operating Range Industrial Industrial Industrial Industrial CY74FCT16373T CY74FCT162373T 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.