AT16244
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.
Functional Block Diagram (1)
Note: 1. The function shown is repeated 3 additional times on each device.
Pin Configurations |
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SSOP/TSSOP |
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Pin Names |
Descriptions |
1OE |
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1Y1 |
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1 |
2 |
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48 |
47 |
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1A1 |
2OE |
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1Y2 |
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3 |
46 |
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1A2 |
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GND |
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4 |
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45 |
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GND |
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1Y3 |
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5 |
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44 |
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1A3 |
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Output Enable Input |
1Y4 |
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6 |
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43 |
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1A4 |
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VCC |
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7 |
42 |
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VCC |
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xOE |
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2Y1 |
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8 |
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41 |
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2A1 |
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(Active Low) |
2Y2 |
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9 |
40 |
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2A2 |
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GND |
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10 |
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39 |
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GND |
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2Y3 |
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11 |
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38 |
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2A3 |
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xAχ |
Data Inputs |
2Y4 |
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12 |
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37 |
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2A4 |
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3Y1 |
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13 |
36 |
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3A1 |
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3Y2 |
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14 |
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35 |
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3A2 |
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GND |
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15 |
34 |
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GND |
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xYχ |
Tri-State Outputs |
3Y3 |
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16 |
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33 |
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3A3 |
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3Y4 |
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17 |
32 |
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3A4 |
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VCC |
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18 |
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31 |
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VCC |
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4Y1 |
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19 |
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30 |
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4A1 |
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4Y2 |
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20 |
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29 |
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4A2 |
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GND |
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21 |
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28 |
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GND |
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4Y3 |
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22 |
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27 |
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4A3 |
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4Y4 |
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23 |
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26 |
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4A4 |
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4OE |
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24 |
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25 |
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3OE |
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Top View
AT16244 Fast Logic™
16-Bit Buffer/Line Driver
AT16244F
AT16244G
0755B
5-3
Function Table(1)
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Inputs |
Outputs |
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xAχ |
xYχ |
xOE |
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L |
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L |
L |
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L |
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H |
H |
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H |
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X |
Z |
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Note: 1. X = Don’t Care, Z = High Impedance
Absolute Maximum Ratings*
........................Operating Temperature |
0°C to +70°C |
Storage Temperature ...................... |
-65°C to +150°C |
Voltage on any Pin |
-2.0V to +7.0V(1) |
with Respect to Ground................... |
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Maximum Operating Voltage.............................. |
6.0V |
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5.0 Volt DC Characteristics
*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.
Applicable over recommended operating range from Ta = 0°C to +70°C, V CC = +5.0V +/- 5% (unless otherwise noted)
Symbol |
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Parameter |
Test Conditions |
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Min |
Typ |
Max |
Units |
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ICC |
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Quiescent Power Supply |
VCC = Max, VIN = 3.4V |
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0.8 |
1.2 |
mA |
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Current |
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VIH |
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Input High Voltage |
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2.0 |
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V |
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VIL |
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Input Low Voltage |
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0.8 |
V |
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IIH |
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Input High Current (I/O Pins) |
VIN = VCC |
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±15 |
μA |
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IIL |
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Input Low Current (I/O Pins) |
VIN = GND |
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±15 |
μA |
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IOZ |
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Output Leakage Current |
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±10 |
mA |
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VOH(1) |
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Output High Voltage |
VCC = 4.75V |
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2.7 |
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V |
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F Grade only |
IOH = -10 mA |
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VOH(2) |
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Output High Voltage |
VCC = 4.75V |
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2.7 |
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V |
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G Grade only |
IOH = -12 mA |
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VOL |
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Output Low Voltage (F Grade) |
IOL = 10 mA |
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0.55 |
V |
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VOL |
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Output Low Voltage (G Grade) |
IOL = 12 mA |
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0.55 |
V |
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Note: 1. F grade: |
At VCC (max), the value of VOH(max) = 3.75V and at VCC(min), VOH(max) = 3.25V |
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2. G grade: |
At VCC (max), the value of VOH(max) = 3.75V and at VCC(min), VOH(max) = 3.35V |
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5-4 |
AT16244 |
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