HD74SSTV16859
1:2 13-bit SSTL_2 Registered Buffer
ADE-205-337G (Z)
Rev.7
June 2001
Description
The HD74SSTV16859 is a 1:2 13-bit registered buffer designed for 2.3 V to 2.7 V Vcc operation and
LVCMOS reset (RESET) input / SSTL_2 data (D) inputs and CLK input.
Data flow from D to QA, QB is controlled by differential clock pins (CLK, CLK) and the RESET. Data is
triggered on the positive edge of the positive clock (CLK), and the negative clock (CLK) must be used to
maintain noise margins. When RESET is low, all registers are reset and all outputs are low.
To ensure defined outputs from the register before a stable clock has been supplied, RESET must be held in
the low state during power up.
Features
• Supports LVCMOS reset (RESET) input / SSTL_2 data (D) inputs and CLK input
• Differential SSTL_2 (Stub series terminated logic) CLK signal
• Flow through architecture optimizes PCB layout
Function Table
Inputs
Outputs
RESET
CLK
CLK
D
QA
QB
L
X
X
X
L
L
H
↓
↑
H
H
H
H
↓
↑
L
L
H
H:
L:
X:
↑:
↓:
Note:
L or H
H or L
X
Q0
L
*1
High level
Low level
Immaterial
Low to high transition
High to low transition
1. Output level before the indicated steady state input conditions were established.
Q0
*1
HD74SSTV16859
Pin Arrangement
Q12A 1
64 VDDQ
Q11A 2
63 GND
Q10A 3
62 D12
Q09A 4
61 D11
Q08A 5
60 VCC
VDDQ 6
59 VDDQ
GND 7
58 GND
Q07A 8
57 D10
Q06A 9
56 D9
Q05A 10
55 D8
Q04A 11
54 GND
Q03A 12
53 D7
Q02A 13
Q01A 14
52 D6
51 RESET
GND 15
50 GND
Q00A 16
49 CLK
Q12B 17
48 CLK
VDDQ 18
47 VDDQ
Q11B 19
46 VCC
Q10B 20
45 VREF
Q09B 21
44 D5
Q08B 22
43 GND
Q07B 23
42 D4
Q06B 24
41 D3
Q05B 25
40 D2
GND 26
39 GND
VDDQ 27
38 VDDQ
Q04B 28
37 VCC
Q03B 29
36 D1
Q02B 30
35 D0
Q01B 31
34 GND
Q00B 32
33 VDDQ
(Top view)
Rev.7, June. 2001, page 2 of 14
HD74SSTV16859
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
VCC or VDDQ
–0.5 to 3.6
V
VI
–0.5 to VDDQ+0.5
V
VO
–0.5 to VDDQ+0.5
V
Input clamp current
IIK
±50
mA
VI < 0 or VI > VCC
Output clamp current
IOK
±50
mA
VO < 0 or VO > VDDQ
Continuous output current
IO
±50
mA
VO = 0 to VDDQ
VCC, VDDQ or GND current / pin
ICC, IDDQ or IGND ±100
mA
Maximum power dissipation
at Ta = 55°C (in still air)
PT
1
W
Storage temperature
Tstg
–65 to +150
°C
Supply voltage
Input voltage
*1
Output voltage
Notes:
*1
Conditions
TSSOP
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.
Rev.7, June. 2001, page 3 of 14
HD74SSTV16859
Recommended Operating Conditions
Item
Symbol Min
Typ
Max
Unit Conditions
Supply voltage
VCC
VDDQ
2.5
2.7
V
Output supply voltage
VDDQ
2.3
2.5
2.7
V
Reference voltage
VREF
1.15
1.25
1.35
V
Termination voltage
VTT
VREF–40 mV
VREF
VREF+40 mV
V
Input voltage
VI
0
—
VCC
V
AC high level input voltage
VIH
VREF+310 mV —
—
V
D
AC low level input voltage
VIL
—
VREF–310 mV V
D
DC high level input voltage
VIH
VREF+150 mV —
—
V
D
DC low level input voltage
VIL
—
—
VREF–150 mV V
D
High level input voltage
VIH
1.7
—
VDDQ+0.3
V
RESET
Low level input voltage
VIL
–0.3
—
0.7
V
RESET
0.97
—
1.53
V
CLK, CLK
VPP
360
—
—
mV
CLK, CLK
High level output current
IOH
—
—
–20
mA
Low level output current
IOL
—
—
20
mA
Operating temperature
Ta
0
—
70
°C
Differential
(Common mode range) VCMR
input voltage (Minimum peak to
—
VREF = 0.5
× VDDQ
peak input)
Note: The RESET input of the device must be held at VDDQ or GND to ensure proper device operation.
The differential inputs must not be floating, unless RESET is low.
Rev.7, June. 2001, page 4 of 14
HD74SSTV16859
Logic Diagram
*1
RESET
51
CLK
CLK
48
49
D0
VREF
35
45
1D
C1
R
16
32
Q00A
Q00B
To twelve other channels
Note:
1.
RESET input gate is connected to VDDQ.
Rev.7, June. 2001, page 5 of 14
HD74SSTV16859
Electrical Characteristics
Item
Symbol VCC (V)
Input diode voltage
VIK
2.3
Output voltage
VOH
VOL
Input current
(All inputs)
IIN
*2
Min
Typ
Max
Unit Test Conditions
—
—
–1.2
V
IIN = –18 mA
2.3 to 2.7 VCC–0.2 —
—
V
IOH = –100 µA
2.3
—
VDDQ
IOH = –16 mA
2.3 to 2.7 —
—
0.2
IOL = 100 µA
2.3
0
—
0.35
IOL = 16 mA
2.7
—
—
±5
µA
VIN = 2.7 V or 0
1.95
Quiescent supply current
ICC
2.7
—
—
45
mA
VIN = VIH(AC) or VIL(AC), IO =
0
Standby current
ICC (stdy) 2.7
—
—
10
µA
RESET = GND
Dynamic operating clock
only
ICCD
*2
2.7
—
—
90
µA/ RESET = VCC,
clock VI = VIH(AC) or VIL(AC),
MHz CLK and CLK switching 50%
duty cycle
Dynamic operating per each ICCD
data input
*2
2.7
—
—
20
µA/
clock
MHz/
data
input
RESET = VCC,
VI = VIH(AC) or VIL(AC),
Output high
Output low
*3
rOH
*3
rOH – rOL each
*3
separate bit
2.3 to 2.7 7
—
CLK and CLK switching 50%
duty cycle. One data input
switching at half clock
frequency, 50% duty cycle.
22
*4
Ω
IOH = –20 mA
*4
Ω
IOL = 20 mA
rOL
2.3 to 2.7 7
—
22
rO(∆)
2.5
—
—
4
Ω
IO = 20 mA, Ta = 25°C
2.5
—
3.5
pF
VI = VREF±310 mV
Data inputs CIN
capacitance
CLK and CLK
2.5
—
3.5
VCMR = 1.25 V, VPP = 360
mV
RESET
—
3.0
—
VI = VCC or GND
Notes: 1.
2.
3.
4.
2.5
*1
Input
All typical values are at VCC = 2.5 V, Ta = 25°C.
Total ICC (max) = ICC + {ICCD (clock)×f(clock)} + {ICCD (Data)×1/2f(clock)×13}
This is effective in the case that it did terminate by resistance.
See figure. 1, 2
Rev.7, June. 2001, page 6 of 14
HD74SSTV16859
Switching Characteristics
Item
Symbol
VCC = 2.5 ± 0.2 V
Min
Clock frequency
*1
Setup time
Hold time
Fast slew rate
*4, 6
Slow slew rate
*5, 6
Fast slew rate
*4, 6
Slow slew rate
*5, 6
Unit
Test Condition
Max
fclock
—
200
MHz
tsu
0.75
—
ns
Data before CLK↑, CLK↓
0.9
—
0.75
—
ns
Data after CLK↑, CLK↓
0.9
—
th
Differential inputs
active time
tact
22
—
ns
Data inputs must be low
after RESET high.
Differential inputs
inactive time
tinact
22
—
ns
Data and clock inputs
must be held at valid
levels (not floating) after
RESET low.
Pulse width
tw
2.5
—
ns
CLK, CLK “H” or “L”
tSL
1
4
volt/ns
Output slew
*3
(CL = 30 pF, RL = 50 Ω, VREF = VTT = VDDQ × 0.5)
Item
Symbol
Maximum clock frequency
Propagation delay time
*2
VCC = 2.5 ± 0.2 V
Unit
Min
Typ
Max
fmax
200
—
—
MHz
tPLH, tPHL
1.1
—
2.8
ns
tPHL
—
—
5.0
FROM
TO
(Input)
(Output)
CLK, CLK QA, QB
RESET
QA, QB
Notes: 1. Although the clock is differential, all timing is relative to CLK going high and CLK going low.
2. This timing relationship is specified into test load (see waveforms – 3, 4) with all of the outputs
switching.
3. Assumes into an equivalent, distributed load to the address net structure defined in the
application information provided in this specification.
4. For data signal input slew rate ≥ 1 V/ns.
5. For data signal input slew rate ≥ 0.5 V/ns and < 1 V/ns.
6. CLK, CLK signals input slew rates are ≥ 1 V/ns.
Rev.7, June. 2001, page 7 of 14
HD74SSTV16859
Test Circuit
VTT
*2
50 Ω
Test point
*1
C L = 30 pF
Notes:
1.
2.
CL includes probe and jig capacitance.
VTT = VREF = VDDQ × 0.5
Waveforms – 1
LVCMOS
RESET
Input
VCC
VCC /2
VCC /2
0V
tinact
tact
*1
I CC
90 %
10 %
Rev.7, June. 2001, page 8 of 14
I CCH
I CCL
HD74SSTV16859
Waveforms – 2
tw
VIH
Input
VREF
VREF
VIL
Timing input
VCMR
tsu
VPP
th
VIH
Input
VREF
VREF
VIL
Waveforms – 3
Timing input
VCMR
VCMR
tPLH
VPP
tPHL
V OH
Output
VTT
VTT
VOL
Rev.7, June. 2001, page 9 of 14
HD74SSTV16859
Waveforms – 4
VIH
LVCMOS
RESET
Input
VCC /2
VIL
tPHL
VOH
Output
VTT
VOL
Notes:
1.
2.
3.
4.
5.
6.
7.
ICC tested with clock and data inputs held at VCC or GND, and IO = 0 mA.
All input pulses are supplied by generators having the following characteristics :
PRR ≤ 10 MHz, Zo = 50 Ω, input slew rate = 1 V/ns ±20% (unless otherwise specified).
The outputs are measured one at a time with one transition per measurement.
VTT = VREF = VDDQ/2
VIH = VREF+310 mV (AC voltage levels) for differential inputs. VIH = VCC for LVCMOS input.
VIL = VREF–310 mV (AC voltage levels) for differential inputs. VIL = GND for LVCMOS input.
tPLH and tPHL are the same as tpd
Rev.7, June. 2001, page 10 of 14
HD74SSTV16859
Application Data
• Pull-down
100
Current (Amps)
80
60
40
Min
Max
20
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
2.0
2.5
3.0
Voltage (V)
Figure . 1
• Pull-up
Voltage (V)
0.0
0
0.5
1.0
1.5
Min
Max
Current (Amps)
-20
-40
-60
-80
-100
Figure . 2
Rev.7, June. 2001, page 11 of 14
HD74SSTV16859
Curve Data
Voltage (V)
Pull-down
Pull-up
I (mA)
I (mA)
I (mA)
I (mA)
Min
Max
Min
Max
0.0
0
0
0
0
0.1
6
7
–5
–7
0.2
10
15
–10
–13
0.3
15
22
–15
–19
0.4
19
29
–19
–25
0.5
23
35.5
–23.5
–31
0.6
27
41.5
–28
–37
0.7
30.5
48
–31.5
–42
0.8
34
54
–35
–47
0.9
36.5
59
–38
–53
1.0
38.5
65
–41
–58
1.1
40
70
–44
–62
1.2
42
75
–46
–66
1.3
43
79
–48
–71
1.4
44
82
–50
–74
1.5
44
84.5
–51
–77
1.6
45
87
–52
–81
1.7
45
89
–52
–84
1.8
45
90
–52.5
–86
1.9
45
90
–53
–89
2.0
45
91
–53
–91
2.1
46
91
–53.5
–92
2.2
46
91
–54
–93
2.3
46
91
–54
–94
2.4
46
91.5
–54
–95
2.5
46
92
–54.5
–96.5
2.6
46
92
–55
–98
2.7
46
92
–55
–99
Rev.7, June. 2001, page 12 of 14
HD74SSTV16859
Package Dimensions
Unit : mm
17.0
17.2 Max
33
6.10
64
1
32
0.50
*0.20 ± 0.05
0.08 M
1.0
8.10 ± 0.20
0.90 Max
*Pd plating
0.05 ± 0.05
0.08
*0.15 ± 0.05
1.20 Max
0˚ - 8˚
0.5 ± 0.1
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
TTP-64D
Conforms
0.47 g
Rev.7, June. 2001, page 13 of 14
HD74SSTV16859
Disclaimer
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable failure
rates or failure modes in semiconductor devices and employ systemic measures such as fail-safes, so that
the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential
damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
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products.
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Copyright © Hitachi, Ltd., 2001. All rights reserved. Printed in Japan.
Colophon 4.0
Rev.7, June. 2001, page 14 of 14