PI74LPT827AR - Pericom Semiconductor

1PS2065A 01/15/97

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PI74LPT827

3.3V 10-BIT BUFFERS

Product Description

Pericom Semiconductor’s PI74LPT series of logic circuits are pro-

duced 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 low-

capacitance 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)

2PS2065A 1/15/97

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PI74LPT827

3.3V 10-BIT BUFFERS

Pin Name Description

OENOutput Enable Input (Active LOW)

D0-D910-bit Data Inputs

Y0-Y910-bit Data Outputs

GND Ground

VCC Power

Product Pin Description

OE1

GND

VCC

OE2

Product Pin Configuration

Inputs Outputs

Function OE1OE2DNYN

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

3PS2065A 01/15/97

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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 de-

vice. This is a stress rating only and functional opera-

tion 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

VHInput 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

4PS2065A 1/15/97

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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

ICTotal 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.

5PS2065A 01/15/97

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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 YXRL = 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