View PI74LVC3245A_19598.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver with 3-State Outputs
Product Features
* * * * 2.7V to 3.6V on A-port and 4.5V to 5.5V on B-port TTL Compatible Inputs Latch-up performance exceeds 200mA Per JESD78 ESD protection exceeds JESD22 2000V Human-Body Model (A114-B) 200V Machine Model (A115-A) * Industrial Temperature: -40C to +85C * Available Packages: 24-pin 173-mil wide plastic TSSOP (L) 24-pin 150-mil wide plastic QSOP (Q) 24-pin 300-mil wide plastic SOIC (S)
Product Description
Pericom Semiconductor's PI74LVC series of logic circuits are produced using the Company's advanced submicron CMOS technology, achieving industry leading speed. The PI74LVC3245A is a non-inverting 8-bit Bidirectional Transceiver that uses two seperate power supply rails. A-port (VCCA) is set to operate at 3.3V and B-port (VCCB) is set to operate at 5V. This allows for translation from a 3.3V to a 5Venvironment and vice-versa. This tranceiver is designed for asynchronous two-way communication between data buses. The direction control input pin (DIR) determines the dataflow from the A bus to the B bus or from the B bus to the A bus. The output enable (OE) input, when HIGH, disables both A and B ports by placing them in HIGH Z condition.
Logic Block Diagram
DIR 2
22
Product Pin Configuration
OE
(3.3V) VCCA DIR A1 A2 A3 A4 A5 A6 A7 A8 GND GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCCB (5V) NC OE B1 B2 B3 B4 B5 B6 B7 B8 GND
A1 3
A2 4
A3
5
21 B1 20 B2 19 18 17 16
A4 6
A5 7
A6 8
A7 9
A8 10
B3
B4
B5
B6
15 B7 14 B8
Product Pin Description
Pin Name OE Outputs DIR Ax Bx NC GND VCCA,VCCB Description 3-State Output Enable Inputs (Active LOW) Direction Control Input Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs NO Internal Connect Ground Power
Truth Table(1)
Inputs OE L L H DIR L H X Bus B Data to Bus A Bus A Data to Bus B Z (Isolation)
L = Low Signal Level Z = High Impedance 1
Note: 1. H = High Signal Level X = Don't Care or Irrelevant
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Supply voltage range, VCCA and VCCB ............................ -0.5V to +7V Input voltage range, VI(2) : I/O ports (A-port) .... -0.5V to VCCA +0.5V I/O ports (B-port) ........... -0.5V to VCCB+0.5V Control Pins ................. -0.5V to VCCA +0.5V Input clamp current, IIK (VI <0)................................................-50mA Output clamp current, IOK (VO <0)...........................................-50mA Continous Output Current IO ..................................................50mA Continous Current through each VCC or GND pin .....................100mA Package thermal impedance, JA(3): package L...................... 84C/W package Q...................... 98C/W package S ...................... 79C/W Storage Temperature range, Tstg ................................-65C to 150C Notes: 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. 2. This value is limited to 7V maximum. 3. The package thermal impedance is calculated in accordance with JESD 51.
2
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs
Recommended Operating Conditions(4)
Parameters VCCA VCCB VIHA VIHB VILA VILB Description Supply Voltage Supply Voltage High-Level Input Voltage High-Level Input Voltage Low-Level Input Voltage Low-Level Input Voltage High-Level Input Voltage (Control Pins) VOB 0.1v or VOB VCCB -0.1V VOA 0.1V or VOA VCCA -0.1V VOB 0.1V or VOB VCCB -0.1V VOA 0.1V or VOA VCCA -0.1V VOA 0.1V or VOA VCCA -0.1V, VOB 0.1V or VOB VCCB -0.1V VOA 0.1V or VOA VCCA -0.1V, VOB 0.1V or VOB VCCB -0.1V 2.7V 3.6V 3.3V 3.3V 2.7V 3.6V 3.3V 3.3V 2.7V 3.6V 2.7V 3.6V 5.0V 5.0V 4.5V 5.5V 5.0V 5.0V 4.5V 5.5V 4.5V 5.5V 4.5V 5.5V 0 0 0 0 2.7V 3V 3V 2.7V 3V 3V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 2 2 0.8 0.8 VCCA VCCB VCCA VCCB -12 -24 -24 12 24 24 10 -40 85 ns/v C mA VCCA VCCB Min. 2.7 4.5 2 2 2 2 0.8 0.8 0.8 0.8 V Typ. 3.3 5 Max. 3.6 5.5 Units
VIH
VIL VIA VIB VOA VOB IOHA IOHB IOLA IOLB t/v TA
Low-Level Input Voltage (Control Pins) Input Voltage Input Voltage Output Voltage Output Voltage High-Level Output Current High-Level Output Current Low-Level Output Current Low-Level Output Current Input transition Rise or Fall Rate Operating Free-Air Temp.
Note: 4. All unused inputs of the device must be held at the associated VCC or GND to ensure proper device operation.
3
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs
DC Electrical Characteristics (Over the Operating Range, TA = -40C +85C)
Parameters Description Test Conditions IOH = -100A VOHA Minimum High Level Output Voltage (Port A) IOH = -12mA IOH = -24mA VOHB Minimum High Level Output Voltage (Port B) Maximum Low Level Output Voltage (Port A) Maximum Low Level Output Voltage (Port B) Maximum Input Leakage Current (Control Inputs) Maximum 3-State Output Leakage Current (A or B ports) Quiescent VCCA Supply Current Quiescent VCCB Supply Current ICC per input (A port) IOH = -100A IOH = -24mA IOL = 100A VOLA IOL = 12mA IOL = 24mA IOL = 100A IOL = 24mA VI = VCCA or GND VI = VIL or VIH, OE = VCCA VO = VCCA/B or GND B to A, B-Port = VCCB or GND, IO (A port) = 0 A to B, A port = VCCA or GND, IO (B port) = 0 One input VI = VCCA -0.6V, other inputs = VCCA or GND, OE = GND and DIR = VCCA One input VI = VCCA -0.6V, other inputs = VCCA or GND, DIR = VCCA VI = VCCA -0.6V, other inputs = VCCA or GND, OE = GND One Input VI = VCCB -2.1V, other inputs = VCCB or GND, OE = GND and DIR = GND VCCA 3V 2.7V 3V 2.7V 3V 3V 3V 3V 2.7V 2.7V 3V 3V 3V 3.6V VCCB 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 4.5V 5.5V Min. 2.9 2.2 2.4 2 2.25 4.4 3.76 Typ. 3 2.55 2.8 2.4 2.7 4.5 4.21 0.01 0.09 0.18 0.18 0.01 0.18 0.1 0.44 0.5 0.44 0.1 0.44 1 V Max. Units
VOLB II
(5)
IOZ
3.6V
5.5V
5 A
ICCA ICCB
3.6V 3.6V 3.6V
5.5V 5.5V 5.5V
10 10 50
ICC per input (OE) ICC(6)
3.6V
5.5V
50
uA
ICC per input (DIR)
3.6V
5.5V
50
ICC per input (B Port)
3.6V
5.5V
0.7
1.5
mA
Notes: 5. For I/O ports, the parameter IOZ includes the input leakage current. 6. This is the increase in supply current for each input that is at one of the specified voltage levels, rather than 0V or the associated VCC.
4
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs
Capacitance (TA = 25C)
Parameters CIN CI/O CPD Description Control Input Capacitance Input/Output Capacitance (A or B port) Power Dissipation Capacitance (7) Test Conditions VI = VCCA or GND, VCCA = Open, VCCB =Open VI/O = VCCA/B or GND, VCCA = 3.3V, VCCB = 5V Outputs Enabled Outputs Disabled VCCA = 3.3V, VCCB = 5V CL = 0pF, f = 10MHz Typ. 2.8 9 22 2.2 pF Units
Notes: 7. CPD is defined as the value of the internal equivalent capacitance which is derived from dynamic operating current consumption (ICCD) at no output loading and operating at 50% duty cycle, CPD is related to ICCD dynamic operating current by the expression: ICCD = (CPD)(VCC)(fIN) +(ICC static)
AC Electrical Characteristics (Over Operating Range, TA = -40C to +85C)
VCCA = 2.7V to 3.6V, VCCB = 5V 0.5V Parameters tPHL tPLH tPHL tPLH tPZL tPZH tPZL tPZH tPLZ tPHZ tPLZ tPHZ tSK(O) From (Input) To (Output) CL = 50pF, RL = 500 Min. A B OE OE OE OE Output-to-Output B A A B A B Skew(8) 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Max. 6.3 6.0 5.7 6.0 7.8 7.5 7.8 7.6 7.0 7.5 7.0 7.3 1.5 ns Units
Note: 8. Skew between any two outputs of the same device, switching in the same direction. Parameter guaranteed by design.
5
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs
Power- Up Considerations
To avoid excessive supply current, bus contention or oscillation during power-up, the following guidelines should be followed: 1. Connect ground first before any supply voltage is applied. 2. Power up VCCA, which is the control side of the device. 3. Ramp OE ahead of or with VCCA to help prevent bus contention 4. Ramp DIR with VCCA if DIR high is needed (A bus to B bus). Otherwise keep DIR Low.
PARAMETER MEASUREMENT INFORMATION FOR A TO B PORT VCCA =2.7V TO 3.6V and VCCB = 5V 0.5V
2xVCCB Open GND
From Output Under Test CL = 50 50pF
(See Note A)
500 500 500 500
S1
Test tPLH/tPHL tPLZ/tPZL tPHZ/tPZH
S1 Open 2 x VCCB GND
Load Circuit
2.7V
Input
Output Control
2.7V
1.5V
1.5V
1.5V
tPLH
1.5V
0V
tPHL
tPZL
Output Waveform 1 S1 at 2 x VCCB 50% VCCB (see Note B) t PZH Output Waveform 2 S1 at GND (see Note B)
0V
tPLZ
VCCB VOL +0.3V
B-Port Output
50% VCCB
VOH
VOL VOH
0V
50% VCCB VOL
tPHZ 50% VCCB
VOH -0.3V
Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable and Disable Times
Figure 1. Load Circuit and Voltage Waveforms
Notes: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. All input impulses are supplied by generators having the following characteristics: PRR 10 MHz, ZO = 50, tR 2.5ns, tF 2.5ns. D. The outputs are measured one at a time with one transition per measurement.
6
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs
PARAMETER MEASUREMENT INFORMATION FOR B TO A PORT VCCA =2.7V TO 3.6V and VCCB = 5V 0.5V
6V From Output Under Test CL = 50 50pF
(See Note A)
500 500 500 500
S1
Open GND
Test tPLH/tPHL tPLZ/tPZL tPHZ/tPZH
S1 Open 6V GND
Load Circuit
3V
B Port Input
Output Control
2.7V
1.5V
1.5V
1.5V
tPLH
1.5V
0V
tPHL
tPZL
Output Waveform 1 S1 at 6V (see Note B) t PZH Output Waveform 2 S1 at GND (see Note B)
1.5V
0V
tPLZ
3V VOL +0.3V
A-Port Output
VOH
VOL VOH
0V
1.5V
1.5V
VOL
tPHZ 1.5V
VOH -0.3V
Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable and Disable Times
Figure 2. Load Circuit and Voltage Waveforms
Notes: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. All input impulses are supplied by generators having the following characteristics: PRR 10 MHz, ZO = 50, tR 2.5ns, tF 2.5ns. D. The outputs are measured one at a time with one transition per measurement.
7
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs
Packaging Mechanical: 24-pin TSSOP (L)
24
.169 .177
4.3 4.5
.004 .008
1
0.09 0.20
.303 .311 7.7 7.9
0.45 0.75
.018 .030
.047 1.20 Max
SEATING PLANE
.252 BSC 6.4
.0256 BSC 0.65
.007 .012 0.19 0.30
.002 .006
0.05 0.15
X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS
Packaging Mechanical: 24-pin QSOP (Q)
24
.008 0.20 MIN.
.150 .157
3.81 3.99
.008 .013 0.20 0.33
Guage Plane
.010 0.254
1
.337 .344
Detail A
8.56 8.74
.016 .035 0.41 0.89
.041 1.04 REF
0-6
.033 0.84
.053 .069
1.35 1.75
.015 x 45 0.38
Detail A
SEATING PLANE
.004 0.101 .010 0.254
.007 .010
0.178 0.254
.016 .050
0.406 1.27
.228 .244 5.79 6.20
.025 typical 0.635
.008 0.203 .012 0.305
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
8
P-0.3
08/05/03
ADVANCE INFORMATION
PI74LVC3245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs
Packaging Mechanical: 24-pin SOIC (S)
24
.2914 .2992
7.40 7.60
.010 .029
1
.5985 15.20 .6141 15.60
0.254 x 45 0.737
0-8
.0091 .0125
0.23 0.32
.021 0.533 .031 0.787
0.41 .016 1.27 .050
.0926 2.35 .1043 2.65
SEATING PLANE
.394 .419 10.00 10.65
.050 BSC
1.27
.013 .020 0.33 0.51
.0040 .0118
0.10 0.30
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
Ordering Information
Ordering Code PI74LVC3245AL PI74LVC3245AQ PI74LVC3245AS Package Code L Q S Package Type 24-pin, 173-mil wide plastic TSSOP 24-pin, 150-mil wide plastic QSOP 24-pin, 300-mil wide plastic SOIC
Notes: 1. Thermal characteristics can be found on the company web site at http://www.pericom.com/packaging/mechanicals.php
Pericom Semiconductor Corporation 2380 Bering Drive * San Jose, CA 95131 * 1-800-435-2336 * Fax (408) 435-1100 * http://www.pericom.com
9
P-0.3 08/05/03

▲Up To Search▲

Price & Availability of PI74LVC3245A

	To Download PI74LVC3245A Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .