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Электронный компонент: HD74SSTV16842

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HD74SSTV16842
11bit to 22bit Buffer with SSTL_2 Inputs and Outputs
ADE-205-602A (Z)
Rev.1
May 2001
Description
The HD74SSTV16842 is a 11bit to 22bit buffer designed for 2.3 V to 2.7 V Vcc operation and SSTL_2
data (A) inputs.
Features
Supports SSTL_2 data inputs
Flow through architecture optimizes PCB layout
Function Table
Input A
Output Y
L L
H H
H :
High level
L :
Low level
HD74SSTV16842
Rev.1, May 2001, page 2 of 7
Pin Arrangement
(Top view)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
A4
25
40 A3
26
39 GND
27
38
28
37
A5
GND
NC
NC
GND
GND
A7
A6
A8
A9
GND
A11
A10
GND
V
CC
V
CC
V
DDQ
V
DDQ
V
DDQ
V
REF
V
DDQ
V
CC
V
DDQ
V
DDQ
V
DDQ
V
DDQ
V
DDQ
V
DDQ
V
DDQ
Y11A
Y10A
Y9A
Y8A
GND
GND
Y7A
Y5A
Y6A
Y4A
Y3A
Y2A
Y1A
Y11B
GND
GND
Y9B
Y10B
GND
Y8B
Y7B
Y6B
Y5B
GND
Y4B
Y3B 29
36 A2
30
35 A1
GND
Y2B 31
34 GND
32
33
Y1B
HD74SSTV16842
Rev.1, May 2001, page 3 of 7
Absolute Maximum Ratings
Item Symbol
Ratings
Unit
Conditions
Supply voltage
V
CC
or V
DDQ
0.5 to 3.6
V
Input voltage
*1
V
I
0.5 to V
DDQ
+0.5 V
Output voltage
*1, 2
V
O
0.5 to V
DDQ
+0.5 V
Input clamp current
I
IK
50 mA
V
I
< 0 or V
I
> V
CC
Output clamp current
I
OK
50 mA
V
O
< 0 or V
O
> V
DDQ
Continuous output current
I
O
50 mA
V
O
= 0 to V
DDQ
V
CC
, V
DDQ
or GND current / pin
I
CC
, I
DDQ
or I
GND
100
mA
Maximum power dissipation
at Ta = 55C (in still air)
P
T
1
W
TSSOP
Storage temperature
Tstg
65 to +150
C
Notes:
Stresses beyond those listed under "absolute maximum ratings" 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.
1. The input and output negative voltage ratings may be exceeded if the input and output clamp
current ratings are observed.
2. This current will flow only when the output is in the high state and V
O
> V
DDQ
.
Recommended Operating Conditions
Item Symbol
Min
Typ
Max
Unit
Conditions
Supply voltage
V
CC
V
DDQ
2.5
2.7 V
Output supply voltage
V
DDQ
2.3
2.5 2.7
V
Reference voltage
V
REF
1.15
1.25
1.35
V
V
REF
= 0.5
V
DDQ
Termination voltage
V
TT
V
REF
40 mV
V
REF
V
REF
+40 mV
V
Input voltage
V
I
0
--
V
CC
V
AC high level input voltage
V
IH
V
REF
+310 mV --
--
V
A
AC low level input voltage
V
IL
--
-- V
REF
310 mV V
A
DC high level input voltage
V
IH
V
REF
+150 mV --
--
V
A
DC low level input voltage
V
IL
--
-- V
REF
150 mV V
A
High level output current
I
OH
--
-- 20
mA
Low level output current
I
OL
--
-- 20
mA
Input transition rise or fall time
t / v --
--
10
ns/V
Operating temperature
Ta
0
--
70
C