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PDF PI74LVC3245AL Data sheet ( Hoja de datos )
| Número de pieza | PI74LVC3245AL | |
| Descripción | 8-Bit Dual Supply Bus Transceiver with 3-State Outputs | |
| Fabricantes | Pericom Semiconductor Corporation | |
| Logotipo |  |
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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: –40°C to +85°C
• 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)
Logic Block Diagram
DIR 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
A8 10
Truth Table(1)
Inputs
OE
L
L
H
DIR
L
H
X
Note:
1. H = High Signal Level
X = Don’t Care or Irrelevant
22 OE
21 B1
20 B2
19 B3
18 B4
17 B5
16 B6
15 B7
14 B8
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
Z (Isolation)
L = Low Signal Level
Z = High Impedance
Product Description
Pericom Semiconductor’s PI74LVC series of logic circuits are
produced using the Company’s advanced submicron CMOS tech-
nology, achieving industry leading speed.
The PI74LVC3245A is a non-inverting 8-bit Bidirectional Trans-
ceiver 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 condi-
tion.
Product Pin Configuration
(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 VCCB (5V)
23 NC
22 OE
21 B1
20 B2
19 B3
18 B4
17 B5
16 B6
15 B7
14 B8
13 GND
Product Pin Description
Pin Name
Description
OE 3-State Output Enable Inputs (Active LOW)
DIR Direction Control Input
Ax Side A Inputs or 3-State Outputs
Bx Side B Inputs or 3-State Outputs
NC NO Internal Connect
GND
Ground
VCCA,VCCB Power
1
P-0.3
08/05/03
1 page  
ADVANCE INFORMATION
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
Capacitance (TA = 25°C)
Param-
eters
Description
CIN Control Input Capacitance
CI/O
Input/Output Capacitance
(A or B port)
CPD
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
Notes:
7. CPD is defined as the value of the internal equivalent capacitance which is derived from dynamic operating current con-
sumption (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)
Units
pF
AC Electrical Characteristics (Over Operating Range, TA = –40°C to +85°C)
VCCA = 2.7V to 3.6V, VCCB = 5V ±0.5V
Parameters
From (Input)
To (Output)
CL = 50pF, RL = 500Ω
Min.
Max.
tPHL
tPLH
A
B
1.0 6.3
1.0 6.0
tPHL
tPLH
B
A
1.0 5.7
1.0 6.0
tPZL
tPZH
OE
A
1.0 7.8
1.0 7.5
tPZL
tPZH
OE
B
1.0 7.8
1.0 7.6
tPLZ
tPHZ
OE
A
1.0 7.0
1.0 7.5
tPLZ
tPHZ
OE
B
1.0 7.0
1.0 7.3
tSK(O)
Output-to-Output Skew(8)
1.5
Note:
8. Skew between any two outputs of the same device, switching in the same direction. Parameter guaranteed by design.
Units
ns
5
P-0.3
08/05/03
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet PI74LVC3245AL.PDF ] | |
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