INTEGRATED CIRCUITS
74LVC2952A
Octal registered tranceiver with 5-volt
tolerant inputs/ouputs (3-State)
Product specification
1998 Jul 29
Philips
Semiconductors
Philips Semiconductors
Product specification
Octal registered tranceiver with 5-volt tolerant
inputs/ouputs (3-State)
74LVC2952A
FEATURES
•
5-volt tolerant inputs/outputs, for interfacing with 5-volt logic
•
Wide supply voltage range of 1.2 V to 3.6 V
•
In accordance with the JEDEC standard no. 8-1 A
•
Inputs accept voltages up to 5.5 V
•
CMOS low power consumption
•
Flow-through pin-out architecture
•
3-State outputs
•
Direct interface with TTL levels
•
Integrated 30W damping resistor
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25°C; t
r
=t
f
≤
2.5 ns
SYMBOL
t
PHL
/t
PLH
f
max
C
I
C
I/O
C
PD
PARAMETER
Propagation delay
CP
nn
to A
n
, B
n
Maximum clock frequency
Input capacitance
Input/output capacitance
Power dissipation capacitance per buffer
V
CC
= 3.3V
1
DESCRIPTION
The 74LVC2952A is a low-power, low-voltage, Si-gate CMOS device
and superior to most advanced CMOS compatible TTL families. The
74LVC2952A is an octal non-inverting registered transceiver. Two 8-bit
back to back registers store data flowing in both directions between two
bidirectional busses. Data applied to the inputs is entered and stored on
the rising edge of the clock (CPnn) provided that the clock enable CE
nn
)
is LOW. The data is then present at the 3-State output buffers, but is
only accessible when the output enable input (OE
nn
) is LOW. Data flow
from A inputs to B outputs is the same as for B inputs to A outputs. The
74LVC2952A is identical to the 74LVC2953A but has non-inverting
outputs.
CONDITIONS
C
L
= 50 pF;
V
CC
= 3.3 V
TYPICAL
4.3
150
5
10
31
UNIT
ns
MHz
pF
pF
pF
NOTE:
1 C
PD
is used to determine the dynamic power dissipation (P
D
in
µW)
P
D
= C
PD
×
V
CC2
×
f
i
)
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz; C
L
= output load capacity in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
(C
L
×
V
CC2
×
f
o
) = sum of the outputs.
ORDERING INFORMATION
PACKAGES
24-Pin Plastic SO
24-Pin Plastic SSOP Type II
24-Pin Plastic TSSOP Type I
TEMPERATURE RANGE
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
OUTSIDE NORTH AMERICA
74LVC2952A D
74LVC2952A DB
74LVC2952A PW
NORTH AMERICA
74LVC2952A D
74LVC2952A DB
74LVC2952APW DH
PKG. DWG. #
SOT137-1
SOT340-1
SOT355-1
PIN CONFIGURATION
B
7
1
B
6
2
B
5
3
B
4
4
B
3
5
B
2
6
B
1
7
B
0
8
OE
AB
9
CP
AB
10
CE
AB
11
GND 12
24 V
CC
23 A
7
22 A
6
21 A
5
20 A
4
19 A
3
18 A
2
17 A
1
16 A
0
15 OE
BA
14 CP
BA
13 CE
BA
PIN DESCRIPTION
PIN NUMBER
8, 7, 6, 5, 4, 3, 2, 1,
12
9, 15
10, 14
11, 13,
16, 17, 18, 19, 20,
21, 22, 23
24
SV01716
SYMBOL
B
0
to B
7
GND
OE
AB
,OE
BA
CP
AB
, CP
BA
CE
AB
, CE
BA
A
0
to A
7
V
CC
FUNCTION
B data inputs/outputs
Ground (0 V)
Output enable inputs
(active LOW)
Clock inputs
Clock enable inputs
A data inputs/outputs
Positive supply voltage
1998 Jul 29
2
853-1993 19803
Philips Semiconductors
Product specification
Octal registered tranceiver with 5-volt tolerant
inputs/ouputs (3-State)
74LVC2952A
LOGIC SYMBOL (IEEE/IEC)
9
OE AB
FUNCTIONAL DIAGRAM
16
CP BA
CE BA
B0
B1
B2
B3
B4
B5
B6
14
13
8
7
6
22
5
4
3
2
1
9
15
11
13
10
OE AB
OE BA
CE AB
CE BA
CP AB
CP BA
23
17
18
19
20
21
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
8
7
6
5
4
3
2
1
10
11
16
17
18
19
20
21
22
23
CP AB
CE AB
A0
A1
A2
A3
A4
A5
A6
A7
OE BA
15
B7
SV01717
14
LOGIC SYMBOL
14
10
13
11
15
9
1 C5
2 C6
G1
G2
EN3
EN4
8
SV01719
16
3
6D
1
1
5D
4
17
18
19
20
21
22
23
7
6
5
4
3
2
1
SV01718
1998 Jul 29
3
Philips Semiconductors
Product specification
Octal registered tranceiver with 5-volt tolerant
inputs/ouputs (3-State)
74LVC2952A
FUNCTION TABLE for register A
n
or B
n
INPUTS
A
n
or B
n
X
L
H
CP
nn
X
↑
↑
CE
nn
H
L
L
INTERNAL
Q
NC
L
H
OPERATING
MODE
Hold data
Load data
Load data
FUNCTION TABLE for output enable
INPUTS
OE
nn
H
L
L
Z =
↑
=
NC =
INTERNAL
Q
X
L
H
A
n
or B
n
OUTPUTS
Z
L
H
OPERATING MODE
Disable outputs
Enable outputs
Enable outputs
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don’t care
high impedance OFF-state
Low-to-High transition
no change
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
CC
V
I
V
I/O
T
amb
t
r
, t
f
PARAMETER
DC supply voltage (for max. speed performance)
DC supply voltage (for low-voltage applications)
DC input voltage range
DC output voltage range; output HIGH or LOW state
DC input voltage range; output 3-State
Operating free-air temperature range
Input rise and fall times
V
CC
= 1.2 to 2.7V
V
CC
= 2.7 to 3.6V
CONDITIONS
LIMITS
MIN
2.7
1.2
0
0
0
–40
0
0
MAX
3.6
3.6
5.5
V
CC
5.5
+85
20
10
UNIT
V
V
V
°C
ns/V
ABSOLUTE MAXIMUM RATINGS
1
In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0 V).
SYMBOL
V
CC
I
IK
V
I
I
OK
V
I/O
I
O
I
GND
, I
CC
T
stg
P
TOT
PARAMETER
DC supply voltage
DC input diode current
DC input voltage
DC output diode current
DC output voltage; output HIGH or LOW
DC output voltage; output 3-State
DC output source or sink current
DC V
CC
or GND current
Storage temperature range
Power dissipation per package
– plastic mini-pack (SO)
– plastic shrink mini-pack (SSOP and TSSOP)
above +70°C derate linearly with 8 mW/K
above +60°C derate linearly with 5.5 mW/K
V
I
t
0
Note 2
V
O
uV
CC
or V
O
t
0
Note 2
Note 2
V
O
= 0 to V
CC
CONDITIONS
RATING
–0.5 to +6.5
–50
–0.5 to +6.5
"50
–0.5 to V
CC
+0.5
–0.5 to 6.5
"50
"100
–65 to +150
500
500
UNIT
V
mA
V
mA
V
mA
mA
°C
mW
NOTES:
1 Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability.
2 The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1998 Jul 29
4
Philips Semiconductors
Product specification
Octal registered tranceiver with 5-volt tolerant
inputs/ouputs (3-State)
74LVC2952A
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions voltages are referenced to GND (ground = 0V)
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
Temp = -40°C to +85°C
MIN
V
IH
HIGH level Input voltage
V
CC
= 1.2V
V
CC
= 2.7 to 3.6V
LOW level Input voltage
V
CC
= 1.2V
V
CC
= 2.7 to 3.6V
V
CC
= 2.7V; V
I
= V
IH
or V
IL
; I
O
= –12mA
V
O
OH
HIGH level output voltage
V
CC
= 3 0V; V
I
= V
IH
or V
IL
; I
O
= –100µA
100µA
3.0V;
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= –18mA
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= –24mA
V
CC
= 2.7V; V
I
= V
IH
or V
IL
; I
O
= 12mA
V
OL
LOW level output voltage
V
CC
= 3.0V; V
I
= V
IH
or V
IL
; I
O
= 100µA
V
CC
= 3.0V; V
I
= V
IH
or V
IL;
I
O
= 24mA
I
I
I
IHZ
/I
ILZ
I
OZ
I
off
I
CC
∆I
CC
Input leakage current
Input current for common I/O pins
3-State output OFF-state current
Power off leakage supply
Quiescent supply current
Additional quiescent supply
current per input pin
V
CC
= 3.6V; V
I
= 5.5V or GND
V
CC
= 3.6V; V
I
= 5.5V or GND
V
CC
= 3.6V; V
I
= V
IH
or V
IL
; V
O
= 5.5V or GND
V
CC
= 0.0V; V
I
or V
O
= 5.5V
V
CC
= 3.6V; V
I
= V
CC
or GND; I
O
= 0
V
CC
= 2.7V to 3.6V; V
I
= V
CC
–0.6V; I
O
= 0
0.1
5
Not for I/O pins
"0.1
"0.1
0.1
V
CC
*0.5
V
CC
*0.2
02
V
CC
*0.6
V
CC
*0.8
0.40
0.20
0.55
"5
"15
"5
"10
10
500
µA
µA
µA
µA
µA
µA
V
V
CC
V
V
CC
2.0
GND
V
0.8
V
TYP
1
MAX
V
UNIT
V
IL
NOTES:
1 All typical values are at V
CC
= 3.3V and T
amb
= 25°C.
AC CHARACTERISTICS
GND = 0 V; t
r
= t
f
v
2.5 ns; C
L
= 50 pF; R
L
= 500W
LIMITS
SYMBOL
PARAMETER
Propagation delay
CP
BA
, CP
AB
to A
n
, B
n
3-state output enable time
OE
BA
, OE
AB
, to A
n
, B
n
3-state output disable time
OE
BA
, OE
AB
, to A
n
, B
n
CP
AB
, CP
BA
pulse width,
HIGH or LOW
Set-up time HIGH or LOW
A
n
, B
n
to CP
AB
, CP
BA
Set-up time, HIGH or LOW
CE
AB
, CE
BA
to CP
AB
, CP
BA
Hold time
A
n
, B
n
to CP
AB
, CP
BA
Hold time
CE
AB
, CE
BA
to CP
AB
, CP
BA
Maximum clock pulse
frequency
WAVEFORM
V
CC
= 3.3V
±0.3V
MIN
t
PHL
/t
PLH
t
PZH/
t
PZL
t
PHZ/
t
PLZ
t
w
t
su
t
su
t
h
t
h
f
max
Figures 1, 4
Figures 3, 4
Figures 3, 4
Figure 1
Figure 2
Figure 2
Figure 2
Figure 2
Figure 2
1.5
1.5
1.5
3.0
2.0
2.0
1.5
1.5
100
TYP
4.1
3.9
3.4
1.5
–0.5
0.5
0.6
0
150
MAX
7.6
7.6
6.6
–
–
–
–
–
–
MIN
1.5
1.5
1.5
3.0
2.0
2.0
1.5
1.5
80
V
CC
= 2.7V
TYP
4.4
4.7
3.8
1.5
–
–
–
–
–
MAX
8.6
8.6
7.6
–
–
–
–
–
–
V
CC
= 1.2V
TYP
16
16
8
–
–
–
–
–
–
ns
ns
ns
ns
ns
ns
ns
ns
MHz
UNIT
NOTE:
These typical values are at V
CC
= 3.3V and T
amb
= 25°C.
1998 Jul 29
5
