AT16244F ATMEL | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 6
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/100 pF (F grade) and 1.1 ns/100 pF (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 Fast Logic 16-Bit Buffer/Line driver provides bus interface and signal buffering at the fastest speeds available in the industry. The Tri-state outputs can be set for either 4-bit, 8-bit, or 16-bit independent operation. The AT16244 also has bus-hold circuitry which retains the last state of the input whenever a high impedance level is detected, and eliminates the need for pull-up or pull-down resistors. Minimal ground bounce and high input noise rejection make this device excellent for use in all high speed interface applications. Note: 1. The function shown is repeated 3 additional times on each device. Functional Block Diagram (1) 1Y2 1Y3 VCC 2Y2 2Y3 3Y1 GND 3Y4 4Y1 GND 4Y4 OE 1A2 1A3 VCC 2A2 2A3 3A1 GND 3A4 4A1 GND 4A4 OE 1A1 GND 1A4 2A1 GND 2A4 3A2 3A3 VCC 4A2 4A3 3OE 1Y1 GND 1Y4 2Y1 GND 2Y4 3Y2 3Y3 VCC 4Y2 4Y3 4OE Pin Names Descriptions xOE Output Enable Input (Active Low) xAχ Data Inputs xYχ Tri-State Outputs Pin Configurations SSOP/TSSOP Top View 0755B AT16244 5-3
xOE xAχ xYχ LLL LH H HXZ Note: 1. X = Don’t Care, Z = High Impedance Function Table(1) Voltage on any Pin (1) *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 V CC +0.75V dc which may overshoot to +7.0V for pulses of less than 20 ns. Absolute Maximum Ratings* 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 VCC = Max, VIN = 3.4V 0.8 1.2 mA VIH Input High Voltage 2.0 V VIL Input Low Voltage 0.8 V IIH Input High Current (I/O Pins) VIN = VCC ±15 µA IIL Input Low Current (I/O Pins) VIN = GND ±15 µA IOZ Output Leakage Current ±10 mA VOH (1) Output High Voltage F Grade only VCC = 4.75V IOH = -10 mA 2.7 V VOH (2) Output High Voltage G Grade only VCC = 4.75V IOH = -12 mA 2.7 V V OL Output Low Voltage (F Grade) IOL = 10 mA 0.55 V V OL Output Low Voltage (G Grade) IOL = 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
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 tPHL tPLH Propagation Delay CL = 50 pF 2.5 ns tPZH tPZL Output Enable Time CL = 50 pF 5.5 ns tPHZ tPLZ Output Disable Time CL = 50 pF 6.0 ns tSK (1) Output Skew CL = 50 pF 0.5 ns ΔtPHL (1) ΔtPLH Propagation Delay vs Output Loading 1.3 1.5 ns/100 pF Note: 1. This parameter is guaranteed but not 100% tested. AC Characteristics AT16244F 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 5.5 ns tPHZ tPLZ Output Disable Time CL = 50 pF 5.0 ns tSK (1) Output Skew CL = 50 pF 0.5 ns ΔtPHL (1) ΔtPLH Propagation Delay vs Output Loading 0.9 1.1 ns/100 pF Note: 1. This parameter is guaranteed but not 100% tested. AT16244G Pulse Generator VIN VOUT D.U.T. VCC R T C L 50 pF 500Ω 7.0V 500Ω 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. Test Circuits (1,2) 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. Switch Position AT16244 5-5
-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 IOL Pull Down Current 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 Ground Bounce for High to Low Transitions (1) VOHP VOHV 0.5 1.5 2.5 3.5 4.5 Time Volts vcc - measured on output with input held constant output Supply Bounce for Low to High Transitions(2) Parameter Value Units VOLP 0.4 V VOLV -0.26 V VOHV VCC - 0.13 V VOHP VCC + 0.6 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 AT16244 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 . Typical Values 5-6 AT16244
1.5 V 1.5 V VOH 1.5 V VOL Output Transition tPLH tPHL Propagation Delay Waveforms Control Input Enable Disable 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 AT16244 5-7
2.5 ns AT16244F - 25YC AT16244F - 25XC 48Y 48X Commercial 2.0 ns AT16244G - 20YC AT16244G - 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)