PO74G245A
www.potatosemi.com
1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs
74 Series Noise Cancellation GHz Logic
FEATURES:
. Patented technology
. Operating frequency up to 1GHz with 2pf load
. Operating frequency up to 730MHz with 5pf load
. Operating frequency up to 320MHz with 15pf load
. Operating frequency up to 75MHz with 50pf load
. VCC Operates from 1.2V to 3.6V
. Propagation delay < 1.65ns max with 15pf load
. Low input capacitance: 5pf typical
. Available in 20pin TSSOP package
DESCRIPTION:
Potato Semiconductor’s PO74G245A is designed for
world top performance using submicron CMOS
technology to achieve 1GHz TTL /CMOS output
frequency with less than 1.65ns propagation delay.
This Octal bus buffer gate is designed for 1.2-V to
3.6-V V
CC
operation.
The
PO74G245A
features independent 8-bit Bidirec-
tional Transceiver with 3 state outputs. Each output is
disabled when the associated output- enable(OE) input
is high.
Pin Configuration
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Logic Block Diagram
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
DIR
A0
A1
A2
A3
A4
A5
A6
A7
OE
B0
B1
B2
B3
B4
B5
B6
B7
Pin Description
Pin Name
OE
DIR
A
X
B
X
GND
V
CC
De s cription
3- State Output Enable Inputs (Active LOW)
Direction Control Input
Side A Inputs or 3- State Inputs
Side B Outputs or 3- State Outputs
Ground
Power
Truth Table
Inputs
OE
L
L
H
DIR
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
Z
Outputs
Potato Semiconductor Corporation
1
01/01/10
PO74G245A
www.potatosemi.com
1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs
74 Series Noise Cancellation GHz Logic
Maximum Ratings
Description
Storage Temperature
Operation Temperature
Operation Voltage
Input Voltage
Output Voltage
Max
-65 to 150
-40 to 85
-0.5 to +4.6
-0.5 to +Vcc
-0.5 to Vcc+0.5
Unit
°C
°C
V
V
V
Note:
stresses greater than 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 specification is not implied.
DC Electrical Characteristics
V
CC
Supply Voltage
O perating
(Over the Operating Range, T
A
= –40°C +85°C)
M in.
1. 4
1. 2
V
CC
0.65 x V
CC
0.65 x V
CC
1. 7
2
GN D
0.35 x V
CC
0.35 x V
CC
0.7
0.8
0
3 .6
V
CC
3.6
–4
–6
– 12
– 24
4
6
12
24
5
–4 0
85
ns/V
°C
mA
V
M a x.
3.6
Units
Data retention only
V
CC
= 1.2V
V
IH
High- level Input Voltage
V
CC
= 1.4V to 1.6V
V
CC
= 1.65V to 1.95V
V
CC
= 2.3V to 2.7V
V
CC
= 3V to 3.6V
V
CC
= 1.2V
V
CC
= 1.4V to 1.6V
V
IL
Low- level Input Voltage
V
CC
= 1.65V to 1.95V
V
CC
= 2.3V to 2.7V
V
CC
= 3V to 3.6V
V
I
V
O
Input Voltage
O utput Voltage
Active State
3- State
V
CC
= 1.4V to 1.6V
0
0
I
OH
High- level output current
V
CC
= 1.65V to 1.95V
V
CC
= 2.3V to 2.7V
V
CC
= 3V to 3.6V
V
CC
= 1.4V to 1.6V
V
CC
= 1.65V to 1.95V
V
CC
= 2.3V to 2.7V
V
CC
= 3V to 3.6V
V
CC
= 1.4V to 3.6V
I
OL
Low- level output current
t v
T
A
Input transition rise or fall rate
O perating free- air temperature
Potato Semiconductor Corporation
2
01/01/10
PO74G245A
www.potatosemi.com
1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs
74 Series Noise Cancellation GHz Logic
DC Electrical Characteristics
Parame te rs
V
O H
I
O HS
= –4mA
I
O HS
= –6mA
I
O HS
= –12mA
I
O HS
= –24mA
I
O LS
= 4mA
V
O L
I
O LS
= 6mA
I
O LS
= 12mA
I
O LS
= 24mA
I
I
I
O Z
I
C C
C
I
C
O
Control Inputs
Data Inputs
Outputs
V
O
= V
C C
or GND
V
I
= V
C C
or GND
V
O
= V
C C
or GND
V
I
= V
C C
or GND
V
I
= V
C C
or GND
(Over the Operating Range, T
A
= –40°C +85°C)
Te s t Conditions
(1)
V
IH
= 0.91V
V
IH
= 1.07V
V
IH
= 1.7V
V
IH
= 2V
V
IL
= 0.49V
V
IL
= 0.57V
V
IL
= 0.7V
V
IL
= 0.8V
V
CC
1.4V
1. 6 5V
2.3V
3V
1. 4 V
1. 6 5 V
2 . 3V
3V
3.6V
3.6V
M in.
1. 0 5
1. 2
1. 7 5
2.0
Typ.
M a x.
Units
0.4
0.45
0.55
0.8
± 2.5
± 10
±350
3.5
5
5
V
A
I
O
= 0
3 . 6V
pF
Notes:
1. Typical values are measured at T
A
= 25°C.
Potato Semiconductor Corporation
3
01/01/10
PO74G245A
www.potatosemi.com
1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs
74 Series Noise Cancellation GHz Logic
Switching Characteristics
Parame te rs
t
pd
t
en
t
dis
fmax CL=2pf
fmax CL=5pf
fmax CL=15pf
fmax CL=50pf
From
(Input)
A or B
OE
OE
A or B
A or B
A or B
A or B
To
(Output)
B or A
B or A
B or A
B or A
B or A
B or A
B or A
V
CC
= 1.2V
Typ.
3.5
8.4
8.4
V
CC
= 1.5V
± 0.1V
Max
3.5
9.6
9.6
270
150
100
45
V
CC
= 1.8V
± 0.15V
Max
2.9
7.0
7.0
300
150
130
50
V
CC
= 2.5V
± 0.2V
Max
1.85
4.3
4.3
685
390
220
70
V
CC
= 3.3V
± 0.3V
Max
1.65
3.5
3.5
1000
730
320
75
Units
ns
Mhz
Operating Characteristics,
Parame te rs
C
pd
Power Dissipation
Capacitance
T
A
= 25°C
Te s t Conditions
C
L
= 0pF,
f = 10 MHz
V
CC
= 1.2V
Typical
18.5
V
CC
= 1.8V
± 0.15V
Typical
20
V
CC
= 2.5V
± 0.2V
Typical
22
V
CC
= 3.3V
± 0.3V
Typical
26
Units
pF
Potato Semiconductor Corporation
4
01/01/10
PO74G245A
www.potatosemi.com
1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs
74 Series Noise Cancellation GHz Logic
Test Waveforms
Test Circuit
500Ohm
50Ohm
50pF
to
2pF
50Ohm
500
Ohm
Potato Semiconductor Corporation
5
01/01/10
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