AT16245F ATMEL | Alldatasheet

Document overview

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Technical content

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/100pF (F grade) and 1.1ns/100pF (G grade)
  • Very Low Ground Bounce <0.6V @ VCC =5.00 V, Ta=25°C
  • Excellent Noise Rejection
  • 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 new family of high speed CMOS transceivers offers the best of all worlds to the user requiring stability and ultra fast speeds. These transceivers, which can function as two 8-bit devices or one 16-bit device, are capable of improving processing efficiency as much as 6% by reducing the number of wait states required during memory access. In addition, this family of parts has been designed to minimize ground bounce on the outputs while rejecting input spikes of up to 1.8V and 1 ns wide. This combination of ultra high speed and low noise is the next step in high speed performance. Pin Configurations Pin Names Descriptions xOE Output Enable Input (Active Low) xDIR Direction Control Input xAχ Side A Inputs or Tri-State Outputs xBχ Side B Inputs or Tri-State Outputs SSOP/TSSOP Top View 0754B AT16245 5-9

Absolute Maximum Ratings* 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=0°C to +70°C, VCC =+5.0V ±5% (unless otherwise noted) Symbol Parameter Test Conditions Min Typ Max Units ΔICC Quiescent Power Supply Current V CC =Max, VIN=3.4V 0.8 1.2 mA V IH Input High Voltage 2.0 V V IL Input Low Voltage 0.8 V IIH Input High Current (I/O Pins) V IN=VCC ±15 µA IIL Input Low Current (I/O Pins) V IN= GND ±15 µA IOZ Output Leakage Current ±10 µA V OH (1) Output High Voltage F Grade only V CC =4.75 V IOH =-10 mA 2.7 V V OH (2) Output High Voltage G Grade only V CC =4.75 V IOH =-12 mA 2.7 V VOL Output Low Voltage (F Grade) I OL =10 mA 0.55 V VOL Output Low Voltage (G Grade) I OL =12 mA 0.55 V 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 Function Table Inputs Outputs xOE xDIR L L Bus B Data to Bus A L H Bus A Data to Bus B HX (1) High Z State Note: 1. X = Don’t Care 5-10 AT16245

Applicable over recommended operating range from Ta=0°C to +70°C, VCC =5.0V ±5% (unless otherwise noted) Symbol Parameter Test Conditions Min Typ Max Units tPHL tPLH Propagation Delay CL=50 pF 2.5 ns tPZH tPZL Output Enable Time CL=50 pF 6.0 ns tPHZ tPLZ Output Disable Time CL=50 pF 6.0 ns tSK (1) Output Skew CL=50 pF 0.5 ns Δ tPHL (1) ΔtPLH Propagation Delay vs Output Loading 1.3 1.5 ns/100pF Note: 1. This parameter is guaranteed but not 100% tested. AT16245G Applicable over recommended operating range from Ta=0°C to +70°C, VCC =5.0V ±5% (unless otherwise noted) Symbol Parameter Test Conditions Min Typ Max Units TPHL TPLH Propagation Delay CL=50 pF 2.0 ns TPZH TPZL Output Enable Time CL=50 pF 6.0 ns TPHZ TPLZ Output Disable Time CL=50 pF 5.0 ns TSK (1) Output Skew CL=50 pF 0.5 ns Δ tPHL (1) ΔtPLH Propagation Delay vs Output Loading 0.9 1.1 ns/100pF Note: 1. This parameter is guaranteed but not 100% tested. Test Circuits(1,2) 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. Switch Position Test Switch Open Drain Disable Low Enable Low Closed All Other Tests Open Definitions: C L = Load capacitance; Includes jig and probe capacitance. R T = Termination resistance; Should be equal to ZOUT of the Pulse Generator. AT16245 5-11

-40 120 160 Time -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 Output, V I, m AOL 2.5 3.0 3.5 4.0 IOL Output, V Typical Values Parameter Value Units VOLP 0.4 V VOLV -0.26 V VOHV V CC - 0.13 V VOHP V CC + 0.6 V Note: 1. When multiple outputs are switched at the same time, rapidly changing current on the ground and VCC paths cause a voltage to develop across the parasitic inductance of the wire bond and package pins. This occurrence is called simultaneous switching noise. Atmel’s AT16245 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. V CC 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 . VOHP VOHV 0.5 1.5 2.5 3.5 4.5 Time Volts vcc - measured on output with input held constant output 3.5 Time VOL V VOLP -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Volts gnd - measured on output with input held constant output Supply Bounce for Low to High Transitions(2) Ground Bounce for High to Low Transitions (1) IOL Pull Down Current 5-12 AT16245

3.0 V 3.5 V 1.5 V 0.3 V 0.3 V 1.5 V Switch Open Switch Closed 1.5 V Output Switched Low Output Switched High tPZL tPZH tPLZ tPHZ VOL VOH Enable and Disable Waveforms(1) Note: 1. Enable and disable waveforms are the same for both xOE and xDIR inputs. Input Transition 1.5 V 1.5 V VOH 1.5 V VOL Output Transition tPLH tPHL Propagation Delay Waveforms AT16245 5-13

Ordering Information

2.5 ns AT16245F - 25YC AT16245F - 25XC 48Y 48X Commercial 2.0 ns AT16245G - 20YC AT16245G - 20XC 48Y 48X Commercial Package Type 48X 48 Pin, Plastic Thin Shrink Small Outline Package (TSSOP) 48Y 48 Pin, Plastic Shrink Small Outline Package (SSOP) 5-14 AT16245