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PDF PI74LPT16245 Data sheet ( Hoja de datos )
| Número de pieza | PI74LPT16245 | |
| Descripción | Fast CMOS 3.3V 16-Bit Bidirectional Transceiver | |
| Fabricantes | Pericom Semiconductor Corporation | |
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PI74LPT16245
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PI74LPT16245
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Fast CMOS 3.3V 16-Bit 1
Bidirectional Transceiver
Product Features
Product Description
2
• 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)
• 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
• Packages available:
– 48-pin 240 mil wide thin plastic TSSOP (A)
– 48-pin 300 mil wide plastic SSOP (V)
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 PI74LPT16245 is a 16-bit bidirectional transceiver designed
for asynchronous two-way communication between data buses.
The direction control input pin (xDIR) determines the direction of
data flow through the bidirectional transceiver. The Direction and
Output Enable controls are designed to operate this device as either
two independent 8-bit transceivers or one 16-bit transceiver. The
output enable (OE) input, when HIGH, disables both A and B ports
by placing them in HIGH Z condition.
The PI74LPT16245 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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Logic Block Diagram
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1DIR
1A0
1A1
1A2
1A3
1A4
1A5
1A6
1A7
1OE
1B0
1B1
1B2
1B3
1B4
1B5
1B6
1B7
2DIR
2A0
2A1
2A2
2A3
2A4
2A5
2A6
2A7
8
2OE
9
2B0
10
2B1
11
2B2
122B3
132B4
142B5
152B6
2B7
1 PS2068A 01/16/97
1 page  
PI74LPT16245
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Switching Characteristics over Operating Range(1)
Parameters Description
Conditions(2)
LPT16245
Com.
Min.(3) Max.
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
tSK(o)
Propagation Delay
A to B, B to A
Output Enable Time
xOE to A or B
Output Disable Time(4)
xOE to A or B
Output Enable Time
xDIR to A or B
Output Disable Time
xDIR to A or B(4)
Output Skew(5)
CL = 50 pF
RL = 500Ω
1.5 5.2
1.5 7.2
1.5 7.2
1.5 7.2
1.5 7.2
0.5
LPT16245A
Com.
Min.(3) Max.
1.5 4.6
1.5 6.2
1.5 5.0
1.5 6.2
1.5 5.0
0.5
LPT16245C
Com.
Min.(3) Max.
1.5 4.1
1.5 5.8
1.5 4.8
1.5 5.8
1.5 4.8
0.5
Units
ns
ns
ns
ns
ns
ns
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 wave forms.
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.
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Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
5 PS2068A 01/16/97
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet PI74LPT16245.PDF ] | |
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