ATMEL AT16244F-25YC, AT16244F-25XC, AT16244F-20YC, AT16244F-20XC Datasheet
AT16244
Fast Logic
16-Bit
Buffer/Line
Driver
AT16244F
AT16244G
Features
••
Fastest Propagation Speeds in the Industry T
PD (F grade)
= 2.5 ns, T
PD (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 fa stest speeds available in the industry. The Tri-state outputs can be set for
either 4-bit, 8-bi t, or 16-bit independent ope ration. The AT16244 al so has bus-hold
circuitry which retain s th e last st ate of the input w henever a high impedance level is
detected, and eliminates the need for pull-up or pull-down resistors. Minimal grou nd
bounce and high input n oise rejection make this device excelle nt 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)
1
1Y2
1Y3
VCC
2Y2
2Y3
3Y1
GND
3Y4
4Y1
GND
4Y4
OE
1
3
5
7
9
11
13
15
17
19
21
23
47
45
43
41
39
37
35
33
31
29
27
25
48
46
44
42
40
38
36
34
32
30
28
26
2
4
6
8
10
12
14
16
18
20
22
24
2
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 Descripti ons
xOE
Output Enable Input
(Active Low)
xA
χ
Data Inputs
xY
χ
Tri-State Outputs
Pin Configurations
SSOP/TSSOP
Top View
0755B
AT16244
5-3
Inputs Outputs
xOE
xAχ xYχ
LLL
LHH
HXZ
Note: 1. X = Don’t Care, Z = High Impedance
Function Table
(1)
Operating Temperature........................0°C to +70°C
Storage Temperature. ........ ..... ........-65°C to +150°C
Voltage on any Pin
with Respect to Ground...................-2.0V to +7.0V
(1)
Ma x imum Operating Voltage.... .. ........................6. 0 V
*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 other wise noted)
Symbol Parameter Test Conditions Min Typ M ax
Units
∆I
CC
Quiescent Power Supply
Current
VCC = 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
I
IH
Input Hig h Current (I/O Pins) VIN = V
CC
±15 µA
I
IL
Input Low Current (I/O Pins) VIN = GND ±15 µA
I
OZ
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 L ow 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 V
CC (max)
, the value of V
OH(max)
= 3.75V and at V
CC(min)
, V
OH(max)
= 3.25V
2. G grade: At V
CC (max)
, the value of V
OH(max)
= 3.75V and at V
CC(min)
, V
OH(max)
= 3.35V
5.0 Vol t DC Cha r ac t eristics
5-4
AT16244
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