PI74LVC3245ALE Datasheet, PDF (1/9 Pages) Pericom Semiconductor Corporation – 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
• Packaging (Pb-free & Green availiable):
– 24-pin 173-mil wide plastic TSSOP (L)
– 24-pin 150-mil wide plastic QSOP (Q)
PI74LVC3245A
8-Bit Dual Supply Bus Transceiver
with 3-State Outputs
Product Description
The PI74LVC3245A is a non-inverting 8-bit Bidirectional Trans-
ceiver that uses two seperate power supply rails. A-port (V_CCA)
is set to operate at 3.3V and B-port (V_CCB) is set to operate at 5V.
This allows for translation from a 3.3V to a 5V environment 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.
Logic Block Diagram
DIR ²
A1 ³
A2 ⁴
A3 ⁵
A4 ⁶
A5 ⁷
A6 ⁸
A7 ⁹
A8 ¹⁰
22 _OE
21 _B1
20 _B2
19 _B3
18 _B4
17 _B5
16 _B6
15 _B7
14 _B8
Truth Table⁽¹⁾
Inputs
OE
DIR
L
L
L
H
H
X
Note:
1. H = High Signal Level
X = Don’t Care or Irrelevant
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
Z (Isolation)
L = Low Signal Level
Z = High Impedance
Product Pin Configuration
(3.3V) 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 (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
V_CCA,V_CCB Power
08-0291
1
PS8699C
10/23/08