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PI74LPT827
3.3V 10-BIT BUFFERS
Product Description
Pericom Semiconductor’s PI74LPT series of logic circuits are produced in the Company’s advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74LPT827 is a 10-bit wide non-inverting bus driver providing
high-performance bus interface buffering for wide address/data
paths or buses carrying parity. The 10-bit buffers have nand-ed
output enables for maximum control flexibility. They are designed
for high-capacitance load drive capability, while providing lowcapacitance bus loading at both inputs and outputs.
The PI74LPT827 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.
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Fast CMOS 3.3V 10-Bit Buffers
PI74LPT827
Logic Block Diagram
Product 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 (24 mA sink and source)
• Low ground bounce outputs
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Packages available:
– 24-pin 173-mil wide plastic TSSOP (L)
– 24-pin 150-mil wide plastic QSOP (Q)
– 24-pin 150-mil wide plastic TQSOP (R)
– 24-pin 300-mil wide plastic SOIC (S)
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PI74LPT827
3.3V 10-BIT BUFFERS
Pin Name Description
OEN Output Enable Input (Active LOW)
D0-D9 10-bit Data Inputs
Y0-Y9 10-bit Data Outputs
GND Ground
VCC Power
Product Pin Description
OE1
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
GND
V
CC
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
Y9
OE2
Product Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
Inputs Outputs
Function OE1 OE2 DN YN
Transparent LLLL
LLHH
Three-State H X X Z
XHXZ
Note:
1. H = High Voltage Level
L = Low Voltage Level
X = Don't Care
Z = High Impedance
Truth Table
(1)
24-PIN
L24
Q24
R24
S24
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PI74LPT827
3.3V 10-BIT BUFFERS
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Stresses greater than those listed under 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
above those indicated in the operational sections of
this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may
affect reliability.
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 V
VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 — 0.8 V
(Input and I/O pins)
IIH Input HIGH Current (Input pins) VCC = Max. VIN = 5.5V — — ±5 µA
Input HIGH Current (I/O pins) VCC = Max. VIN = VCC ——±5µA
IIL Input LOW Current (Input pins) VCC = Max. VIN = GND — — ±5 µA
Input LOW Current (I/O pins) VCC = Max. VIN = GND — — ±5 µA
IOZH High Impedance Output Current VCC = Max. VOUT = 5.5V — — ±5 µA
IOZL (3-State Output pins) VCC = Max. VOUT = GND — — ±5 µA
VIK Clamp Diode Voltage VCC = Min., IIN = –18 mA — –0.7 –1.2 V
IODH 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 mA
VOH Output HIGH Voltage VCC = Min. IOH = –0.1 mA Vcc-0.2 — — V
VIN = VIH or VIL IOH = –3 mA 2.4 3.0 — V
VCC = 3.0V, IOH = –8 mA 2.4
(5)
3.0 — V
VIN = VIH or VIL IOH = –24 mA 2.0 — —
VOL Output LOW Voltage VCC = Min. IOL = 0.1 mA — — 0.2 V
VIN = VIH or VIL IOL = 16 mA — 0.2 0.4 V
IOL = 24 mA — 0.3 0.5 V
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
VH Input Hysteresis — 150 — mV
Capacitance (TA = 25°C, f = 1 MHz)
Parameters
(1)
Description Test Conditions Typ. Max. Units
CIN Input Capacitance VIN = 0V 4.5 6 pF
COUT Output Capacitance VOUT = 0V 5.5 8 pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified 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.
Note:
1. This parameter is determined by device characterization but is not production tested.
Storage Temperature............................................................ –65°C to +150°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
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PI74LPT827
3.3V 10-BIT BUFFERS
Power Supply Characteristics
Parameters Description Test Conditions
(1)
Min. Typ
(2)
Max. Units
ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC 0.1 10 µA
∆ICC Quiescent Power Supply Current VCC = Max. VIN = VCC – 0.6V
(3)
2.0 30 µA
TTL Inputs HIGH
ICCD Dynamic Power Supply
(4)
VCC = Max., VIN = VCC 50 75 µA/
Outputs Open VIN = GND MHz
OEX = GND
One Bit Toggling
50% Duty Cycle
IC Total Power Supply VCC = Max., VIN = VCC – 0.6V 0.6 2.3 mA
Current
(6)
Outputs Open VIN = GND
fI = 10 MHZ
50% Duty Cycle
OEX = GND
One Bit Toggling
VCC = Max., VIN = VCC – 0.6V 2.1 4.7
(5)
Outputs Open VIN = GND
fI = 2.5 MHZ
50% Duty Cycle
OEX = GND
Ten Bits Toggling
Notes:
1. For Max. or Min. conditions, use appropriate value specified 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 + ∆ICC DHNT + ICCD (fCP/2 + fINI)
ICC = Quiescent Current (ICCL, ICCH and ICCZ)
∆ICC = Power Supply Current for a TTL High Input
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
NCP = Number of Clock Inputs at fCP
fI = Input Frequency
NI = Number of Inputs at fI
All currents are in milliamps and all frequencies are in megahertz.
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PI74LPT827
3.3V 10-BIT BUFFERS
Switching Characteristics over Operating Range
(1)
LPT827A LPT827B LPT827C
Com. Com. Com.
Parameters Description Conditions
(2)
Min.
(3)
Max. Min.
(3)
Max. Min.
(3)
Max. Units
tPLH Propagation Delay CL = 50 pF 1.5 6.5 1.5 5.0 1.5 4.4 ns
tPHL DXX to YX RL = 500Ω
tPZH Output Enable Time 1.5 9.5 1.5 8.0 1.5 7.0 ns
tPZL OEx to Yx
tPHZ Output Disable Time
(4)
1.5 8.5 1.5 6.0 1.5 5.7 ns
tPLZ OEx to Yx
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. See test circuit and waveforms.
3. Minimum limits are guaranteed but not tested on Propagation Delays.
4. This parameter is guaranteed but not production tested.
5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
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