PI74LVC4245A Datasheet, PDF (1/9 Pages) Pericom Semiconductor Corporation – 8-Bit Dual Supply Bus Transceiver with 3-State Outputs

ADVANCE INFORMATION
Product Features
• 4.5V to 5.5V on A-port and 2.7V to 3.6V on B-port
• Latch-up performance exceeds 200mA Per JESD78
• ESD protection exceeds JESD 22
- 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
DIR
L
L
L
H
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
PI74LVC4245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
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 PI74LVC4245A is a non-inverting 8-bit Bidirectional Trans-
ceiver that uses two separate power supply rails. A-port (V_CCA)
is set to operate at 5V and B-port (V_CCB) is set to operate at 3.3V.
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
(5V) V_CCA 1
DIR 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
A8 10
GND 11
GND 12
24 VCCB (3.3V )
23 VCCB (3.3V )
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
GND
Ground
V_CCA,V_CCB Power
1
P-0.2
08/11/03