1PS2067G 11/10/08
Description
Pericom Semiconductor’s PI74LPT16244 is a 16-bit buffer/line
driver designed for driving high capacitive memory loads.
With its balanced-drive characteristics, this high-speed, low
power device provides lower ground bounce, transmission line
matching of signals, fewer line refl ections and lower EMI and
RFI effects. This makes it ideal for driving on-board buses and
transmission lines. This device is designed with three-state
controls to operate in a Quad-Nibble, Dual-Byte, or a single
16-bit word mode.
The PI74LPT16244 can be driven from either 3.3V or 5.0V
devices allowing this device to be used as a translator in a mixed
3.3/5.0V system.
Block Diagram
Features
• Compatible with LCX and LVT families of products
• Supports 5V Tolerant Mixed Signal Mode Operation
– Input can be 3V or 5V
– Output can be 3V or connected to 5V bus
• Advanced Low Power CMOS Operation
• Excellent output drive capability:
Balanced drives (24mA sink and source)
• Pin compatible with industry standard double-density pinouts
• Low ground bounce outputs
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Multiple center pins and distributed Vcc/GND pins minimize
switching noise
• Packaging (Pb-free & Green available):
– 48-pin 240-mil wide thin plastic TSSOP (A)
– 48-pin 300-mil wide plastic SSOP (V)
PI74LPT16244
3.3V, 16-Bit Buffer/Line Driver
1
OE
1
A
0 1 1
Y
0
3
OE
2
OE
4
OE
1
A
1 1 1
Y
1
1
A
2 1 1
Y
2
1
A
3 1 1
Y
3
2
A
0 2 2
Y
0
2
A
1 2 2
Y
1
2
A
2 2 2
Y
2
2
A
3 2 2
Y
3
3
A
0 3 3
Y
0
3
A
1 3 3
Y
1
3
A
2 3 3
Y
2
3
A
3 3 3
Y
3
4
A
0 4 4
Y
0
4
A
1 4 4
Y
1
4
A
2 4 4
Y
2
4
A
3 4 4
Y
3
08-0291
2PS2067G 11/10/08
PI74LPT16244
3.3V, 16-Bit Buffer/Line Driver
Product Pin Confi guration
Product Pin Description
Pin Name Description
xOE 3-State Output Enable Inputs (Active LOW)
xAx Inputs
xYx 3-State Outputs
GND Ground
VCC Power
1
2
3
4
5
6
7
8
9
48
10
47
11
46
12
45
13
44
14
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
32
31
30
29
28
27
26
25
1OE
1Y0
1Y1
GND
1Y2
1Y3
VCC
2Y0
2Y1
GND
2Y2
2Y3
3Y0
3Y1
GND
3Y2
3Y3
VCC
4Y0
4Y1
GND
4Y2
4Y3
4OE
2OE
1A0
1A1
GND
1A2
1A3
VCC
2A0
2A1
GND
2A2
2A3
3A0
3A1
GND
3A2
3A3
VCC
4A0
4A1
GND
4A2
4A3
3OE
48-Pin
A, V
Truth Table Inputs(1) Outputs(1)
XOE XAXxYx
LL L
LH H
HX Z
Notes:
1. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, Z = High Impedance
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Note:
Stresses greater than those listed under MAX I MUM RAT-
INGS may cause permanent damage to the de vice. This is
a stress rating only and func tion al op er a tion of the device
at these or any other conditions above those indicated in
the operational sections of this specifi cation is not implied.
Exposure to absolute maximum rating conditions for ex-
tended periods may affect reliability.
Storage Temperature ............................................................ –55°C to +125°C
Ambient Temperature with Power Applied ........................... –40°C to +85°C
Supply Voltage to Ground Potential (Inputs & VCC Only) .....–0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) ..–0.5V to +7.0V
DC Input Voltage ....................................................................–0.5V to +7.0V
DC Output Current .............................................................................. 120 mA
Power Dissipation ................................................................................... 1.0W
08-0291
3PS2067G 11/10/08
PI74LPT16244
3.3V, 16-Bit Buffer/Line Driver
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 2.7V to 3.6V)
Parameters Description Test Conditions(1) Min. Typ(2) Max. Units
VIH
Input HIGH Voltage (Input pins) Guaranteed Logic HIGH Level 2.2 5.5
V
Input HIGH Voltage (I/O pins) 2.0 5.5
VIL
Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8
(Input and I/O pins)
IIH
Input HIGH Current (Input pins) VCC = Max. VIN = 5.5V ±1
μA
Input HIGH Current (I/O pins) VCC = Max. VIN = VCC ±1
IIL
Input LOW Current (Input pins) VCC = Max. VIN = GND ±1
Input LOW Current (I/O pins) VCC = Max. VIN = GND ±1
IOZH High Impedance Output Current VCC = Max. VOUT = 5.5V ±1
IOZL (3-State Output pins) VCC = Max. VOUT = GND ±1
VIK Clamp Diode Voltage VCC = Min., IIN = –18 mA –0.7 –1.2 V
IOHD Output HIGH Current VCC = 3.3V, VIN = VIH or VIL, VO =
1.5V(3) –36 –60 –110
mA
IODL Output LOW Current VCC = 3.3V, VIN = VIH or VIL, VO =
1.5V(3) 50 90 200
VOH Output HIGH Voltage
VCC = Min.
VIN = VIH or VIL
IOH = –0.1 mA Vcc-0.2
V
IOH = –3 mA 2.4 3.0
VCC = 3.0V, IOH = –8 mA 2.4(5) 3.0
VIN = VIH or VIL IOH = –24 mA 2.0
VOL Output LOW Voltage VCC = Min.
VIN = VIH or VIL
IOL = 0.1 mA 0.2
IOL = 16 mA 0.2 0.4
IOL = 24 mA 0.3 0.5
IOS Short Circuit Current(4) VCC = Max.(3), VOUT = GND –60 –85 –240 mA
IOFF Power Down Disable VCC = 0V, VIN or VOUT ≤ 4.5V ±100 μA
Notes:
1. For Max. or Min. conditions, use appropriate value specifi ed under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 3.3V, +25°C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is guaranteed but not tested.
5. VOH = VCC – 0.6V at rated current.
Notes:
1. This parameter is determined by device characterization but is not production tested.
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(1) De scrip tion Test Conditions Typ Max. Units
CIN Input Capacitance VIN = 0V 3 6 pF
COUT Output Capacitance VOUT = 0V 3 8
08-0291
4PS2067G 11/10/08
PI74LPT16244
3.3V, 16-Bit Buffer/Line Driver
Power Supply Characteristics
Parameters De scrip tion Test Conditions(1) Min. Typ(2) Max. Units
ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC 0.1 10
μA
ΔICC Quiescent Power Supply Current
TTL Inputs HIGH VCC = Max. VIN = VCC – 0.6V(3) 500
ICCD Dynamic Power Supply(4)
VCC = Max.,
Outputs Open
XOE = GND
One Bit Toggling
50% Duty Cycle
VIN = VCC
VIN = GND 50 75 μA/
MHz
ICTotal Power Supply
Current(6)
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
XOE = GND
One Bit Toggling
VIN = VCC – 0.6V
VIN = GND 0.5 0.8
mA
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
XOE = GND
16 Bits Toggling
VIN = VCC – 0.6V
VIN = GND 2.0 3.3(5)
Notes:
1. ForMax. or Min. conditions, use appropriate value specifi ed under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 3.3V, +25°C ambient.
3. Per TTL driven input; all other inputs at Vcc or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested.
6. IC =IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ΔICC DHNT + ICCD (fCP/2 + fINI)
I
CC = Quiescent Current (ICCL, ICCH and ICCZ)
ΔICC = Power Supply Current for a TTL High Input
D
H = Duty Cycle for TTL Inputs High
N
T = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
CP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
N
CP = Number of Clock Inputs at fCP
fI = Input Frequency
N
I = Number of Inputs at fI
All currents are in milliamps and all frequencies are in megahertz.
08-0291
5PS2067G 11/10/08
PI74LPT16244
3.3V, 16-Bit Buffer/Line Driver
Notes:
1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V ±0.3V, normal range. For Vcc = 2.7V, extended range, all Propagation Delays
and Enable/Disable times should be degraded by 20%.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not production tested.
4. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guar an teed by design.
Switching Characteristics over Operating Range(1)
Parameters Description Conditions
LPT16244 LPT16244A LPT16244C
UnitsCom. Com. Com.
Min(2) Max. Min(2) Max. Min(2) Max.
tPLH
tPHL
Propagation Delay
XAX to XYX
CL = 50 pF
RL = 500Ω
1.5 5.2 1.5 4.8 1.5 4.1
ns
tPZH
tPZL
Output Enable Time
xOE to xYx 1.5 7.0 1.5 6.2 1.5 5.8
tPHZ
tPLZ
Output Disable Time(3)
xOE to xYx 1.5 7.0 1.5 5.6 1.5 5.2
tSK(o) Output Skew(4) 0.5 0.5 0.5
Packaging Mechanical: 48-pin TSSOP (A)
.236
.244
.488
.496
.002
.006
SEATING PLANE
.007
.010
.0197
BSC
.004
.008
.319
1
48
12.4
12.6
6.0
6.2
0.50 0.17
0.27 8.1
0.05
0.15
0.09
0.20
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.018
.030
0.45
0.75
.047
1.20 Max
BSC
DOCUMENT CONTROL NO.
PD - 1501
REVISION: G
DATE: 03/09/05
Note:
1. Controlling dimensions in millimeters.
2. Ref: JEDEC MO-153F/ED
3. Dimension does not include mold flash, protrusions or gate burrs. Mold flash, protru-
sions and gate burrs shall not exceed 0.15mm per side.
4. Dimension does not include interlead flash or protrusion. Interlead flash or protrusion
shall not exceed 0.25mm per side. DESCRIPTION: 48-Pin 240-Mil Wide TSSOP
PACKAGE CODE: A
Pericom Semiconductor Corporation
3545 N. 1st Street, San Jose, CA 95134
1-800-435-2335 • www.pericom.com
See Note 3
See Note 4
08-0291
6PS2067G 11/10/08
PI74LPT16244
3.3V, 16-Bit Buffer/Line Driver
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
Ordering Information
Ordering Code Package Code Description
PI74LPT16244V V 48-pin 300 mil wide plastic SSOP
PI74LPT16244CV V 48-pin 300 mil wide plastic SSOP
PI74LPT16244AE A Pb-free & Green, 48-pin 240 mil wide plastic TSSOP
PI74LPT16244AAE A Pb-free & Green, 48-pin 240 mil wide plastic TSSOP
PI74LPT16244CAE A Pb-free & Green, 48-pin 240 mil wide plastic TSSOP
Notes:
• Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
• E = Pb-free & Green
• Adding an X suffi x = Tape/Reel
Packaging Mechanical: 48-pin SSOP (V)
0.20
0.51
1.01
0.25
0.381
0.635
.008
.008
.016
0-8˚
0.20
0.40
.110 2.79
.010
Gauge Plane
.02
.04
.015
.025 x 45˚
.025 BSC
0.635
.291
.299
X.XX
X.XX DENOTES DIMENSIONS
IN MILLIMETERS
7.39
7.59
.395
.420
10.03
10.67
.620
.630
15.75
16.00
.008
.0135 0.20
0.34
1
48
Nom.
Max
DESCRIPTION: 48-Pin, 300-Mil Wide, SSOP
PACKAGE CODE: V
DOCUMENT CONTROL NO.
PD - 1401
REVISION: E
DATE: 03/09/05
Notes:
1) Controlling dimensions in inches.
2) Ref: JEDEC MO-118B/AA
Pericom Semiconductor Corporation
3545 N. 1st Street, San Jose, CA 95134
1-800-435-2335 • www.pericom.com
08-0291
