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| AT16373 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 < 0.6V @ VCC =5.00V, Ta=25C Excellent noise rejection Typical output skew 0.25ns TM Bus Hold circuitry to retain last active state during Tri-stateTM Available in SSOP and TSSOP packages Description Atmel's AT16373 devices provide maximum speed in temporary data storage. They can be operated as either two separate 8 bit latches or as a single 16-bit latch by use of the output enable and the latch enable. The AT16373 has very low ground bounce and excellent input noise rejection, giving the user stable signals in a high speed environment. These devices can drive very large loads while operating in a high speed transparent mode. AT16373 Fast LogicTM 16-Bit Transparent Latch AT16373F AT16373G Functional Block Diagram (1) Note: 1. This 8-bit latch function is repeated a second time on each device. Pin Configurations Pin Names xOE xLE xD xO Descriptions Output Enable Input (Active Low) Latch Enable Inputs (Active High) Data Inputs Tri-State Outputs 1OE 1O2 1O3 VCC 1O6 1O7 2O1 GND 2O4 2O5 GND 2O8 1O1 GND 1O4 1O5 GND 1O8 2O2 2O3 VCC 2O6 2O7 2OE 1 3 5 7 9 11 13 15 17 19 21 23 SSOP/TSSOP 2 4 6 8 10 12 14 16 18 20 22 24 48 46 44 42 40 38 36 34 32 30 28 26 47 45 43 41 39 37 35 33 31 29 27 25 1D1 GND 1D4 1D5 GND 1D8 2D2 2D3 VCC 2D6 2D7 2LE 1LE 1D2 1D3 VCC 1D6 1D7 2D1 GND 2D4 2D5 GND 2D8 Top View 0756B 5-15 Function Table(1) Inputs xD H L X Note: 1. X = Don't Care, Z = High Impedance Outputs xOE L L H xO H L Z xLE H H X Absolute Maximum Ratings* Operating Temperature........................ 0C to +70C Storage Temperature...................... -65C to +150C Voltage on any Pin with Respect to Ground .................. -2.0V to +7.0V(1) Maximum Operating Voltage ............................. 6.0V *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 -0.6V dc which may undershoot to -2.0V for pulses of less than 20 ns. Maximum output pin voltage is VCC +0.75V dc which may overshoot to +7.0V for pulses of less than 20 ns. 5.0 Volt DC Characteristics Applicable over recommended operating range from Ta = 0C to +70C, VCC = +5.0V +/- 5% (unless otherwise noted) Units Symbol ICC V IH VIL IIH IIL IOZ V OH(1) Parameter Quiescent Power Supply Current Input High Voltage Input Low Voltage Input High Current Input Low Current 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 = 4.75V IOH = -10 mA VCC = 4.75V 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 = 3.4V 2.0 0.8 15 15 10 Min Typ 0.8 Max 1.2 mA V V A A A V V V V V OH(2) VOL VOL Note: 1. F grade: At VCC (max), the value of VOH(max) = 3.75V and at VCC(min), VOH(max) = 3.25V 2. G grade: At VCC (max), the value of VOH(max) = 3.75V and at VCC(min), VOH(max) = 3.35V 5-16 AT16373 AT16373 AC Characteristics AT16373F Applicable over recommended operating range from Ta = 0C to +70C, VCC = 5.0V +/- 5% (unless otherwise noted) Symbol tPHL tPLH tPHL tPLH tPZH tPZL tPHZ tPLZ tSK(2) tPHL(2) tPLH tsu tH Parameter Propagation Delay xD to xO Propagation Delay xLE to xO Output Enable Output Disable Output Skew Propagation Delay vs Output Loading Set-up Time Hold Time CL = 50 pF CL = 50 pF 2.0 2.0 Test Conditions(1) CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF 1.3 Min Typ Max 2.5 5.5 8.8 6.5 0.5 1.5 Units ns ns ns ns ns ns/100 pF ns ns Note: 1. See test circuit and waveforms. 2. This parameter is guaranteed but not 100% tested. AT16373G Applicable over recommended operating range from Ta = 0C to +70C, VCC = 5.0V +/- 5% (unless otherwise noted) Symbol tPHL tPLH tPHL tPLH tPZH tPZL tPHZ tPLZ tSK(2) tPHL(2) tPLH tsu tH Parameter Propagation Delay xD to xO Propagation Delay xLE to xO Output Enable Output Disable Output Skew Propagation Delay vs Output Loading Set-up Time Hold Time CL = 50 pF CL = 50 pF 2.0 2.0 Test Conditions(1) CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF 0.9 Min Typ Max 2.0 5.0 8.8 Units ns ns ns ns ns ns/100 pF ns ns 6.0 0.5 1.1 Note: 1. See test circuit and waveforms. 2. This parameter is guaranteed but not 100% tested. 5-17 Test Circuits(1,2) VCC 7.0V Switch Position Test Open Drain Disable Low Enable Low All Other Tests 50 pF 500 Switch Closed Open 500 VIN Pulse Generator RT D.U.T. VOUT CL Definitions: CL = Load capacitance; Includes jig and probe capacitance. RT = Termination resistance; Should be equal to ZOUT of the Pulse Generator. Note: 1. Pulse Generator: Rate 1.0 MHz, tF 2.5 ns, tR 2.5 ns. 2. AC tests are done with a single bit switching, and timings need to be derated when multiple outputs are switching in the same direction simultaneously. This derating should not exceed 0.5 ns for 16 inputs switching simultaneously. IOL Pull Down Current 160 120 IOL, mA 80 40 0 -40 Time 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 -0.5 -1.0 IOL Output, V Output, V Ground Bounce for High to Low Transitions(1) 3.5 3.0 2.5 2.0 gnd - measured on output with input held constant output Supply Bounce for Low to High Transitions(2) 4.5 4 3.5 3 2.5 2 1.5 1 0.5 VOHV VOHP vcc measured on output with input held constant output Volts 1.5 1.0 0.5 0.0 VOLV VOLP Volts -0.5 0 Time Time 5-18 AT16373 AT16373 Typical Values Parameter V OLP V OLV VOHV VOHP Value 0.4 -0.26 V CC - 0.13 VCC + 0.6 Units V V V V Note: 1. When multiple outputs are switched at the same time, rapidly changing current on the ground and VCC paths causes a voltage to develop across the parasitic inductance of the wire bond and package pins. This occurrence is called simultaneous switching noise. Atmel's AT16373 products have minimized this phenomenon as shown on the graph. Output data is for 15 outputs switching simultaneously at a frequency of 1 MHz. The ground data is measured on the one remaining output, which is set to logic low and will reflect any device ground movement. 2. As on the graph for Ground Bounce, a similar condition occurs for low to high transitions. Output data is for 15 outputs switching simultaneously at a frequency of 1 MHz. VCC droop is measured on the one remaining output pin, which is set to a logic high. This output will reflect any movement on the device VCC. Propagation Delay Waveforms Input Transition 1.5 V tPLH 1.5 V tPHL VOH Output Transition 1.5 V VOL Enable and Disable Waveforms(1) Enable Disable 3.0 V 1.5 V 0V tPZL tPLZ 3.5 V Switch Closed 1.5 V 0.3 V tPZH tPHZ 0.3 V 1.5 V Switch Open 0V Note: 1. Enable and disable waveforms are the same for both xOE and xLE inputs. Control Input Output Switched Low VOL Output Switched High VOH 5-19 Ordering Information TPD 2.5 ns 2.0 ns Ordering Code AT16373F - 25YC AT16373F - 25XC AT16373G - 20YC AT16373G - 20XC Package 48Y 48X 48Y 48X Operation Range Commercial Commercial Package Type 48X 48Y 48 Pin, Plastic Thin Shrink Small Outline Package (TSSOP) 48 Pin, Plastic Shrink Small Outline Package (SSOP) 5-20 AT16373 |
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