1
PS8650B 06/05/06
Product Description
The PI74LVTCH16244 is a non-inverting 16-bit buffer and line
driver designed for low-voltage 2.7V to 3.6V V
CC
operation, with the
capability of interfacing to the 5V system environment. This buffer/
driver is designed specifically to improve both the performance and
density of 3-State memory address drivers, clock drivers, and bus-
oriented receivers and transmitters. The device can be used as four
4-bit buffers, two 8-bit buffers, or one 16-bit buffer.
The PI74LVTCH16244 has "Bus Hold" which retains the data
input's last valid logic state whenever the data input goes to high-
impedance, preventing "floating" inputs and eliminating the need
for pull-up/down resistors.
When Vcc is between 0 to 1.5V during power up or power down,
the device is in the high-impedance state. To ensure the high-
impedance state above 1.5V, OE should be tied to Vcc through a
pullup resistor; the minimum value of the resistor is determined by
the current sinking capability of the driver.
The device fully supports live-insertion with its I
off
and power-up/
down 3-state. The I
off
circuitry disables the outputs when the
power is off, preventing the backflow of damaging current through
the device. Power-up/down 3-state places the outputs in the high-
impedance state during power up or power down, preventing driver
conflict.
3.3V 16-Bit Buffer/Line Driver
with 3-State Outputs
Logic Block Diagram
Product Features
· Advanced low power CMOS design for 2.7V to 3.6V
Vcc operation
· Supports 5V input/output tolerance in mixed signal mode
operation
· Function compatible with LVT family of products
· Balanced ±24mA output drive
· Typical V
OGB
(Output Ground Bounce) <0.8V at V
CC
=3.3V,
T
A
=25°C
·I
off
and Power Up/Down 3-State support live insertion
· Bus Hold on data inputs eliminates the need for external
pull-up/down resistors
· 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 (Pb-free & Green available):
– 48-pin 240-mil wide plastic TSSOP (A)
PI74LVTCH16244
1OE
1A1 1Y1
1A2 1Y2
1A3 1Y3
1A4 1Y4
3OE
3A1 3Y1
3A2 3Y2
3A3 3Y3
3A4 3Y4
2OE
2A1 2Y1
2A2 2Y2
2A3 2Y3
2A4 2Y4
4OE
4A1 4Y1
4A2 4Y2
4A3 4Y3
4A4 4Y4
43
44
46
47
1
37
38
40
41
48
12
11
9
8
6
5
3
2
32
33
35
36
25
17
16
14
13
26
27
29
30
24
23
22
20
19
