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AT16646F Dataheets PDF



Part Number AT16646F
Manufacturers ATMEL Corporation
Logo ATMEL Corporation
Description AT16646 Fast Logic 16-Bit Tri-State Register
Datasheet AT16646F DatasheetAT16646F Datasheet (PDF)

AT16646 Features • • • • • • Fastest Propagation Speeds in the Industry TPD (F grade) = 2.5 ns, TPD (G grade) = 2.0 ns Maximum derating for capacitive loads 1.5ns/100 pF (F grade) and 1.1ns/100 pF (G grade) Very low ground bounce < 0.6 V @ VCC =5.00 V, Ta=25°C Typical output skew ≤0.25ns Bus Hold circuitry to retain last active state during Tri-State™ Available in SSOP and TSSOP packages Description Atmel’s AT16646 devices are 16-bit high speed, low power Tri-statable D type registers, ideal .

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AT16646 Features • • • • • • Fastest Propagation Speeds in the Industry TPD (F grade) = 2.5 ns, TPD (G grade) = 2.0 ns Maximum derating for capacitive loads 1.5ns/100 pF (F grade) and 1.1ns/100 pF (G grade) Very low ground bounce < 0.6 V @ VCC =5.00 V, Ta=25°C Typical output skew ≤0.25ns Bus Hold circuitry to retain last active state during Tri-State™ Available in SSOP and TSSOP packages Description Atmel’s AT16646 devices are 16-bit high speed, low power Tri-statable D type registers, ideal for use in systems requiring both transparent and registered mode functions. They are organized as two separate 8-bit bus transceivers. Data flow is bi-directional, and can be controlled for multiplexed transmission between A bus and B bus either directly or from the D registers by use of the direction control pin (xDir), output enable (xOE), and select lines (xSAB and xSBA). Storage of data on the A bus and B bus is controlled by the output pins. They have very low ground bounce and excellent input noise rejection, giving the user stable signals in a high speed environment. The Bus Hold feature eliminates the need for pull-up or pull-down resistors and retains the last active state during a Tri-State event. AT16646 Fast Logic™ 16-Bit Tri-State™ Register AT16646F AT16646G Functional Block Diagram Pin Configurations 1DIR SSOP/TSSOP 1SAB 1A1 VCC 1A4 GND 1A7 2A1 2A3 2A4 2A6 2A7 GND 2CLKAB 1CLKAB GND 1A2 1A3 1A5 1A6 1A8 2A2 GND 2A5 VCC 2A8 2SAB 2DIR 1 3 5 7 9 11 13 15 17 19 21 23 25 27 2 4 6 8 10 12 14 16 18 20 22 24 26 28 56 54 52 50 48 46 44 42 40 38 36 34 32 30 55 53 51 49 47 45 43 41 39 37 35 33 31 29 1CLKBA GND 1B2 1B3 1B5 1B6 1B8 2B2 GND 2B5 VCC 2B8 2SBA 2OE 1OE 1SBA 1B1 VCC 1B4 GND 1B7 2B1 2B3 2B4 2B6 2B7 GND 2CLKBA Pin Names xDir, xOE xCLKAB,xCLKBA xSAB, xSBA xAχ xBχ Descriptions Output Enable Inputs Clock Pulse Inputs Output Data Source Select Inputs Data Register A Inputs Data Register B Outputs Data Register B Inputs Data Register A Outputs Top View 0757B 5-21 Function Table(1) Inputs xOE H H L L L L Notes: Data I/O(2) xSAB X X X X L H xSBA X X L H X X xAχ Input Output Input xBχ Input Input Output Operation or Function Isolation Store A and B Data Real Time B Data to A Bus Stored B Data to A Bus Real Time A Data to B Bus Stored A Data to B Bus xDir X X L L H H xCLKAB H or L ↑ X X X H or L xCLKBA H or L ↑ X H or L X X 1. H = High voltage level, L = Low voltage level, X = Don’t care, ↑ = Low-to-High transition 2. The data output functions may be enabled or disabled by various signals at the xOE or xDir inputs. Data input functions are always enabled, i.e. data at the bus pins will be stored on every LOW-to-HIGH transition on the clock inputs. *NOTICE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Notes: 1. Minimum voltage is -0.6 V dc which may undershoot to -2.0 V for pulses of less than 20 ns. Maximum output pin voltage is VCC +0.75 V dc which may overshoot to +7.0 V for pulses of less than 20 ns. Absolute Maximum Ratings* Operating Temperature........................ 0°C to +70°C Storage Temperature ...................... -65°C to +150°C Voltage on any Pin with Respect to Ground................. -2.0 V to +7.0 V(1) Maximum Operating Voltage.............................. 6.0V 5.0 Volt DC Characteristics Symbol ∆ ICC VIH VIL IIH IIL IOZ VOH(1) VOH(2) V OL V OL Note: Applicable over recommended operating range from Ta = 0°C to +70°C, VCC = +5.0V +/- 5% (unless otherwise noted) Parameter Quiescent Power Supply Current Input High Voltage Input Low Voltage Input High Current (I/O Pins) Input Low Current (I/O Pins) Output Leakage Current Output High Voltage F Grade only Output High Voltage G Grade only Output Low Voltage (F Grade) Output Low Voltage (G Grade) VCC = 4.75 V IOH = -10 mA VCC = 4.75 V IOH = -12 mA IOL = 10 mA IOL = 12 mA 2.7 2.7 0.55 0.55 VIN = VCC VIN = GND Test Conditions VCC = Max, VIN = 3.4 V 2.0 0.8 ±15 ±15 ±10 Min Typ 0.8 Max 1.2 Units mA V V µA µA µA V V V V 1. F grade: At VCC (max), the value of VOH(max) = 3.75 V and at VCC(min), VOH(max) = 3.25 V 2. G grade: At VCC (max), the value of VOH(max) = 3.75 V and at VCC(min), VOH(max) = 3.35 V 5-22 AT16646 AT16646 AC Characteristics AT16646F Applicable over recommended operating range from Ta = 0°C to +70°C, VCC = 5.0V +/- 5% (unless otherwise noted) Symbol tPHL tPLH tPZH tPZL tPHZ tPLZ Parameter Propagation Delay Output Enable Time Output Disable Time Output Skew Propagation Delay vs Output Loading Set-up Time Bus to Clock Hold Time Bus to Clock Test Conditions(1) CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF Min Typ Max 2.5 7.4 6.4 0.5 Units ns ns ns ns ns/100 pF ns ns tSK(1) ∆tPHL(.


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