INTEGRATED CIRCUITS
74ALVT16952
2.5V/3.3V ALVT 16-bit registered
transceiver (3-State)
Product specification
Supersedes data of 1995 Sep 19
IC23 Data Handbook
1998 Mar 19
Philips
Semiconductors
Philips Semiconductors
Product specification
2.5V/3.3V 16-bit registered transceiver (3-State)
74ALVT16952
FEATURES
•
Two 8-bit registered transceivers
•
5V I/O Compatible
•
3-State buffers
•
Output capability: +64mA/–32mA
•
TTL input and output switching levels
•
Input and output interface capability to systems at 5V supply
•
Bus hold data inputs eliminate the need for external pull-up
resistors to hold unused inputs
DESCRIPTION
The 74ALVT16952 is a high-performance BiCMOS product
designed for V
CC
operation at 2.5V or 3.3V with I/O compatibility up
to 5V.
The 74ALVT16952 is a dual octal registered transceiver. Two 8-bit
registers store data flowing in both directions between two
bidirectional buses. Data applied to the inputs is entered and stored
on the rising edge of the Clock (nCPXX) provided that the Clock
Enable (nCEXX) is Low. The data is then present at the 3-State
output buffers, but is only accessible when the Output Enable
(nOEXX) is Low. Data flow from A inputs to B outputs is the same as
for B inputs to A outputs.
Active bus hold circuitry is provided to hold unused or floating data
inputs at a valid logic level.
•
Live insertion/extraction permitted
•
Power-up 3-State
•
Power-up reset
•
No bus current loading when output is tied to 5V bus
•
Latch-up protection exceeds 500mA per JEDEC Std 17
•
ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
QUICK REFERENCE DATA
SYMBOL
t
PLH
t
PHL
C
IN
C
I/O
I
CCZ
PARAMETER
Propagation delay
nCPBA to nAx or
nCPAB to nBx
Input capacitance
I/O pin capacitance
Total supply current
CONDITIONS
T
amb
= 25°C; GND = 0V
C
L
= 50pF;
V
I
= 0V or V
CC
V
I/O
= 0V or V
CC
Outputs disabled
Outputs disabled
TYPICAL
2.5V
3.0
3.0
3
9
40
3.3V
2.3
2.3
3
9
70
UNIT
ns
pF
pF
µA
ORDERING INFORMATION
PACKAGES
56-Pin Plastic SSOP Type III
56-Pin Plastic TSSOP Type II
TEMPERATURE RANGE
–40°C to +85°C
–40°C to +85°C
OUTSIDE NORTH AMERICA
74ALVT16952 DL
74ALVT16952 DGG
NORTH AMERICA
AV16952 DL
AV16952 DGG
DWG NUMBER
SOT371-1
SOT364-1
LOGIC SYMBOL (IEEE/IEC)
3
54
56
1
2
55
EN1
EN2
EN3
EN4
C5
C6
2, 3, 6
1, 4, 5
52
51
49
48
47
45
44
43
26
31
29
28
27
30
EN1
EN2
EN3
EN4
C5
C6
2, 3, 6
1, 4, 5
42
41
40
38
37
36
34
33
5
6
8
9
10
12
13
14
15
16
17
19
20
21
23
24
SH00069
1998 Mar 19
2
853-2053 19136
Philips Semiconductors
Product specification
2.5V/3.3V 16-bit registered transceiver (3-State)
74ALVT16952
PIN CONFIGURATION
1OEAB
1CPAB
1CEAB
GND
1A0
1A1
V
CC
1A2
1A3
1A4
GND
1A5
1A6
1A7
2A0
2A1
2A2
GND
2A3
2A4
2A5
V
CC
2A6
2A7
GND
2CEAB
2CPAB
2OEAB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
1OEBA
1CPBA
1CEBA
GND
1B0
1B1
V
CC
1B2
1B3
1B4
GND
1B5
1B6
1B7
2B0
2B1
2B2
GND
2B3
2B4
LOGIC SYMBOL
5
6
8
9
10
12
13
14
1A0 1A1 1A2 1A3 1A4 1A5 1A6 1A7
2
3
55
54
1CPAB
1CEAB
1CPBA
1CEBA
1B0 1B1 1B2 1B3 1B4 1B5 1B6 1B7
1OEBA
1OEAB
56
1
52
51
49
48
47
45
44
43
15
16
17
19
20
21
23
24
2A0 2A1 2A2 2A3 2A4 2A5 2A6 2A7
27
26
30
2CPAB
2CEAB
2CPBA
2CEBA
2B0 2B1 2B2 2B3 2B4 2B5 2B6 2B7
2OEBA
2OEAB
29
28
2B5
V
CC
2B6
2B7
GND
2CEBA
2CPBA
2OEBA
31
42
41
40
38
37
36
34
33
SH00071
SH00070
PIN DESCRIPTION
PIN NUMBER
2, 55
27, 30
3, 54,
26, 31
5, 6, 8, 9, 10, 12, 13, 14, 15,
16, 17, 19, 20, 21, 23, 24
52, 51, 49, 48, 47, 45, 44, 43
42, 41, 40, 38, 37, 36, 34, 33
1, 56
28, 29
4, 11, 18, 25, 32, 39, 46, 53
7, 22, 35, 50
SYMBOL
1CPAB / 1CPBA
2CPAB / 2CPBA
1CEAB / 1CEBA
2CEAB / 2CEBA
1A0 – 1A7
2A0 – 2A7
1B0 – 1B7
2B0 – 2B7
1OEAB / 1OEBA
2OEAB / 2OEBA
GND
V
CC
NAME AND FUNCTION
Clock input A to B / Clock input B to A
Clock enable input A to B / Clock enable input B to A
Data inputs/outputs (A side)
Data inputs/outputs (B side)
Output enable inputs
Ground (0V)
Positive supply voltage
1998 Mar 19
3
Philips Semiconductors
Product specification
2.5V/3.3V 16-bit registered transceiver (3-State)
74ALVT16952
FUNCTION TABLE for Register nAx or nBx
INPUTS
nAx or
nBx
X
L
H
nCPXX
X
↑
↑
nCEXX
H
L
L
INTERNAL
Q
NC
L
H
OPERATING
MODE
Hold data
Load data
FUNCTION TABLE for Output Enable
INPUTS
nOEXX
H
L
L
INTERNAL
Q
X
L
H
nAx or nBx
OUTPUTS
Z
L
H
OPERATING
MODE
Disable outputs
Enable outputs
H = High voltage level
L = Low voltage level
↑
= Low-to-High transition
X = Don’t care
XX = AB or BA
NC= No change
H = High voltage level
L = Low voltage level
X = Don’t care
XX = AB or BA
Z = High impedance ”off” state
LOGIC DIAGRAM
nCEAB
nCPAB
nOEAB
DETAIL A
CE
nA0
D
CP
Q
Q
CE
D
nB0
CP
nA1
nA2
nA3
nA4
nA5
nA6
nA7
DETAIL A X 7
nB1
nB2
nB3
nB4
nB5
nB6
nB7
nCEBA
nCPBA
nOEBA
SH00072
1998 Mar 19
4
Philips Semiconductors
Product specification
2.5V/3.3V 16-bit registered transceiver (3-State)
74ALVT16952
ABSOLUTE MAXIMUM RATINGS
1, 2
SYMBOL
V
CC
I
IK
V
I
I
OK
V
OUT
I
OUT
T
stg
PARAMETER
DC supply voltage
DC input diode current
DC input voltage
3
DC output diode current
DC output voltage
3
DC output current
Storage temperature range
V
O
< 0
output in Off or High state
output in Low state
output in High state
V
I
< 0
CONDITIONS
RATING
–0.5 to +4.6
–50
–0.5 to +7.0
–50
–0.5 to +7.0
128
–64
–65 to +150
UNIT
V
mA
V
mA
V
mA
°C
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 performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
SYMBOL
V
CC
V
I
V
IH
V
IL
I
OH
I
OL
∆t/∆v
T
amb
DC supply voltage
Input voltage
High-level input voltage
Input voltage
High-level output current
Low-level output current
Low-level output current; current duty cycle
≤
50%; f
≥
1kHz
Input transition rise or fall rate; Outputs enabled
Operating free-air temperature range
–40
PARAMETER
2.5V RANGE LIMITS
MIN
2.3
0
1.7
0.7
–8
8
24
10
+85
–40
MAX
2.7
5.5
3.3V RANGE LIMITS
MIN
3.0
0
2.0
0.8
–32
32
64
10
+85
MAX
3.6
5.5
UNIT
V
V
V
V
mA
mA
ns/V
°C
1998 Mar 19
5
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