HD74LVCC3245A
Octal Bus Transceiver with adjustable output voltage
and 3-state Outputs
REJ03D0379–0201
Rev.2.01
Apr. 12, 2005
Description
The HD74LVCC3245A has eight bus transceivers with three state outputs in a 24 pin package. When (DIR) is high,
data flows from the A inputs to the B outputs, and when (DIR) is low, data flows from the B inputs to the A outputs. A
and B bus are separated by making enable input (OE) high level. This 8-bit non-inverting bus transceiver contains two
separate power-supply rails.
And this product has two terminals (V
CCA
, V
CCB
), V
CCA
is connected with control input and A bus side, V
CCB
is
connected with B bus side. V
CCA
and V
CCB
are isolated.
The B port is designed to track V
CCB
, which accepts voltage from 3 V to 5.5 V, and the A port is designed to track V
CCA
,
which operates at 2.3 V to 3.6 V. This allows for translation from a 3.3 V to a 5 V system environment and vice versa,
or from a 2.5 V to a 3.3 V system environment and vice versa. Low voltage and high-speed operation is suitable at the
battery drive product (note type personal computer) and low power consumption extends the life of a battery for long
time operation.
Features
•
This product function as level shift transceiver that change V
CCA
input level to V
CCB
output level, V
CCB
input level to
V
CCA
output level by providing different supply voltage to V
CCA
and V
CCB
.
•
This product is able to the power management: Turn on and off the supply on V
CCB
side with providing the supply
of V
CCA
(Enable input (OE): High level)
•
V
CCA
= 2.3 V to 3.6 V, V
CCB
= 3.0 V to 5.5 V
•
All control input V
I
(max) = 5.5 V (@V
CCA
= 0 V to 5.5 V)
•
All A bus side input outputs V
I/O
(max) = 5.5 V
(@V
CCA
= 0 V or output off state)
•
All B bus side input outputs V
I/O
(max) = 5.5 V
(@V
CCB
= 0 V or output off state)
•
High output current
A bus side: ±8 mA (@V
CCA
= 2.3 V)
±12 mA (@V
CCA
= 2.7 V)
±24 mA (@V
CCA
= 3.0 V)
B bus side: ±24 mA (@V
CCB
= 3.0 V)
•
Ordering Information
Part Name
HD74LVCC3245ATEL
Package Type
TSSOP–24 pin
Package Code
(Previous Code)
PTSP0024JB–A
(TTP–24DBV)
Package
Abbreviation
T
Taping Abbreviation
(Quantity)
EL (1,000 pcs/reel)
Rev.2.01 Apr. 12, 2005 page 1 of 10
HD74LVCC3245A
Absolute Maximum Ratings
Item
Supply voltage
Input voltage
*1
Input / output voltage
Symbol
V
CCA
, V
CCB
V
I
V
I/O
Ratings
–0.5 to 6.0
–0.5 to 6.0
–0.5 to V
CCA
+0.5
–0.5 to 6.0
–0.5 to V
CCB
+0.5
–0.5 to 6.0
–50
–50
50
±50
100
862
–65 to 150
Unit
V
V
V
Conditions
DIR,
OE
A port output “H” or “L”
A port output “Z” or V
CCA
: OFF
B port output “H” or “L”
B port output “Z” or V
CCB
: OFF
V
I
< 0
V
O
< 0
V
O
> V
CC
+0.5
Input diode current
Output diode current
Output current
V
CCA
, V
CCB
, GND current
Maximum power dissipation
*2
at Ta = 25°C (in still air)
Storage temperature
I
IK
I
OK
I
O
I
CCA
, I
CCB
, I
GND
P
T
Tstg
mA
mA
mA
mA
mW
°C
TSSOP
Notes: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of
which may be realized at the same time.
1. The input and output voltage ratings may be exceeded even if the input and output clamp-current ratings are
observed.
2. The maximum package power dissipation was calculated using a junction temperature of 150°C.
Recommended Operating Conditions
Ratings
Supply voltage
2.3 to 3.6
3.0 to 5.5
Input / output voltage
0 to 5.5
0 to V
CCA
0 to 5.5
0 to V
CCB
0 to 5.5
Output current
I
OHA
–8
–12
–24
I
OHB
–24
I
OLA
8
12
24
I
OLB
24
Input transition rise or fall time
∆t
/
∆v
10
Operating temperature
Ta
–40 to 85
Note: Unused or floating inputs must be held high or low.
Item
Symbol
V
CCA
V
CCB
V
I
V
I/O
Unit
V
V
Conditions
mA
DIR,
OE
A port output “H” or “L”
A port output “Z” or V
CCA
: OFF
B port output “H” or “L”
B port output “Z” or V
CCB
: OFF
V
CCA
= 2.3 V
V
CCA
= 2.7 V
V
CCA
= 3.3 V
V
CCB
= 3.0 V
V
CCA
= 2.3 V
V
CCA
= 2.7 V
V
CCA
= 3.3 V
V
CCB
= 3.0 V
ns / V
°C
Rev.2.01 Apr. 12, 2005 page 3 of 10
HD74LVCC3245A
Electrical Characteristics (cont)
(Ta = –40 to 85°C)
Item
Input current
Off state
output current
Output leak current
Quiescent
supply current
Symbol
I
IN
I
OZ
I
OFF
I
CCA
V
CCA
(V)
3.6
3.6
0
3.6
3.6
V
CCB
(V)
3.6
5.5
3.6
5.5
0
OPEN
3.6
5.5
Min
Max
±1
±5
20
50
50
50
Unit
Test Conditions
µA
Control input
V
I
= V
CCA
or GND
µA
µA
µA
V
I(CONT)
= V
IH
or V
IL
V
O
= V
CCA
, V
CCB
or GND
A port, V
I/O
= 5.5 V
B port, V
I/O
= 3.6 V
An = V
CCA
or GND,
Control input = V
CCA
B to A,
Control input =V
CCA
or GND
Bn = V
CCB
or GND,
I
O
(A port) = 0
A to B,
Control input =V
CCA
or GND
An = V
CCA
or GND,
I
O
(B port) = 0
mA A port or Control input
One input at V
CCA
–0.6V,
Other input at V
CCA
at GND
I
CCB
3.6
3.6
5.5
50
80
Increase in I
CC
*1
per input
∆I
CCA
3.6
3.6
0.5
B port,
One input at V
CCB
–0.6 V
Other input at V
CCB
or GND
Control input at GND
Notes: For condition shown as Min or Max, use the appropriate values under recommended operating conditions.
1. This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
CC
or GND.
∆I
CCB
3.6
3.6
0.5
Capacitance
(Ta = 25°C)
Item
Control Input, capacitance
Input / output capacitance
Symbol
C
IN
C
I/O
V
CCA
(V)
3.3
3.3
V
CCB
(V)
5
5
Min
Typ
5
11
Max
Unit
Test Conditions
pF V
I
= V
CCA
or GND
pF A port, V
I
= V
CCA
or GND,
B port, V
I
= V
CCB
or GND
Rev.2.01 Apr. 12, 2005 page 5 of 10
Talking
京公网安备 11010802033920号
EEWORLD
