TI SN74ALVCH16841DL

SN74ALVCH16841
20-BIT BUS-INTERFACE D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES043D – JULY 1995 – REVISED FEBRUARY 1999
D
D
D
D
D
D
DGG OR DL PACKAGE
(TOP VIEW)
Member of the Texas Instruments
Widebus  Family
EPIC  (Enhanced-Performance Implanted
CMOS) Submicron Process
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
1OE
1Q1
1Q2
GND
1Q3
1Q4
VCC
1Q5
1Q6
1Q7
GND
1Q8
1Q9
1Q10
2Q1
2Q2
2Q3
GND
2Q4
2Q5
2Q6
VCC
2Q7
2Q8
GND
2Q9
2Q10
2OE
Latch-Up Performance Exceeds 250 mA Per
JESD 17
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages
description
This 20-bit bus-interface D-type latch is designed
for 1.65-V to 3.6-V VCC operation.
The SN74ALVCH16841 features 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. This device is
particularly suitable for implementing buffer
registers, unidirectional bus drivers, and working
registers.
The SN74ALVCH16841 can be used as two 10-bit
latches or one 20-bit latch. The 20 latches are
transparent D-type latches. The device has
noninverting data (D) inputs and provides true
data at its outputs. While the latch-enable (1LE or
2LE) input is high, the Q outputs of the
corresponding 10-bit latch follow the D inputs.
When LE is taken low, the Q outputs are latched
at the levels set up at the D inputs.
1
56
2
55
3
54
4
53
5
52
6
51
7
50
8
49
9
48
10
47
11
46
12
45
13
44
14
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
25
32
26
31
27
30
28
29
1LE
1D1
1D2
GND
1D3
1D4
VCC
1D5
1D6
1D7
GND
1D8
1D9
1D10
2D1
2D2
2D3
GND
2D4
2D5
2D6
VCC
2D7
2D8
GND
2D9
2D10
2LE
A buffered output-enable (1OE or 2OE) input can be used to place the outputs of the corresponding 10-bit latch
in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state,
the outputs neither load nor drive the bus lines significantly.
OE does not affect the internal operation of the latches. Old data can be retained or new data can be entered
while the outputs are in the high-impedance state.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74ALVCH16841 is characterized for operation from –40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus and EPIC are trademarks of Texas Instruments Incorporated.
Copyright  1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
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1
SN74ALVCH16841
20-BIT BUS-INTERFACE D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES043D – JULY 1995 – REVISED FEBRUARY 1999
FUNCTION TABLE
(each 10-bit latch)
INPUTS
OE
LE
D
OUTPUT
Q
L
H
H
H
L
H
L
L
L
L
X
Q0
H
X
X
Z
logic symbol†
1
1OE
1LE
56
28
2OE
2LE
1D1
1D2
1D3
1D4
1D5
1D6
1D7
1D8
1D9
1D10
2D1
2D2
2D3
2D4
2D5
2D6
2D7
2D8
2D9
2D10
29
55
EN2
C1
EN4
C3
1D
54
2
2
52
5
51
6
49
8
48
9
47
10
45
12
44
13
43
14
42
15
3D
4
41
16
40
17
38
19
37
20
36
21
34
23
33
24
31
26
30
27
† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2
3
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1Q1
1Q2
1Q3
1Q4
1Q5
1Q6
1Q7
1Q8
1Q9
1Q10
2Q1
2Q2
2Q3
2Q4
2Q5
2Q6
2Q7
2Q8
2Q9
2Q10
SN74ALVCH16841
20-BIT BUS-INTERFACE D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES043D – JULY 1995 – REVISED FEBRUARY 1999
logic diagram (positive logic)
1OE
1LE
1
2OE
56
2LE
C1
1D1
55
2
1D
28
29
C1
1Q1
2D1
42
To Nine Other Channels
1D
15
2Q1
To Nine Other Channels
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 4.6 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 4.6 V
Output voltage range, VO (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA
Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous current through each VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
Package thermal impedance, θJA (see Note 3): DGG package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81°C/W
DL package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
† 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.
NOTES: 1. The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. This value is limited to 4.6 V maximum.
3. The package thermal impedance is calculated in accordance with JESD 51.
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SN74ALVCH16841
20-BIT BUS-INTERFACE D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES043D – JULY 1995 – REVISED FEBRUARY 1999
recommended operating conditions (see Note 4)
VCC
Supply voltage
VIH
High-level input voltage
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V to 3.6 V
MIN
MAX
1.65
3.6
2
0.35 × VCC
Low-level input voltage
VI
VO
Input voltage
0
Output voltage
0
0.7
VCC = 2.7 V to 3.6 V
IOL
∆t/∆v
High level output current
High-level
VCC = 2.7 V
VCC = 3 V
VCC = 1.65 V
VCC = 2.3 V
Low level output current
Low-level
VCC = 2.7 V
VCC = 3 V
Input transition rise or fall rate
V
1.7
VIL
IOH
V
0.65 × VCC
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 1.65 V
VCC = 2.3 V
UNIT
V
0.8
VCC
VCC
V
V
–4
–12
–12
mA
–24
4
12
12
mA
24
10
ns/V
TA
Operating free-air temperature
–40
85
°C
NOTE 4: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
4
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SN74ALVCH16841
20-BIT BUS-INTERFACE D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES043D – JULY 1995 – REVISED FEBRUARY 1999
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
1.65 V to 3.6 V
IOH = –100 µA
IOH = –4 mA
1.65 V
IOH = –6 mA
VOH
IOH = –12 mA
IOH = –24 mA
IOL = 100 µA
IOZ
ICC
∆ICC
Ci
Data inputs
2
2.3 V
1.7
UNIT
2.7 V
2.2
3V
2.4
3V
2
V
0.2
2.3 V
0.4
2.3 V
0.7
2.7 V
0.4
3V
0.55
±5
3.6 V
VI = 0.58 V
VI = 1.07 V
1.65 V
25
1.65 V
–25
VI = 0.7 V
VI = 1.7 V
2.3 V
45
2.3 V
–45
VI = 0.8 V
VI = 2 V
3V
75
3V
–75
V
µA
µA
VI = 0 to 3.6 V‡
3.6 V
±500
VO = VCC or GND
VI = VCC or GND,
3.6 V
±10
µA
3.6 V
40
µA
750
µA
One input at VCC – 0.6 V,
Control inputs
2.3 V
0.45
IOL = 24 mA
VI = VCC or GND
II(hold)
(
)
MAX
VCC–0.2
1.2
1.65 V
IOL = 12 mA
II
TYP†
1.65 V to 3.6 V
IOL = 4 mA
IOL = 6 mA
VOL
MIN
IO = 0
Other inputs at VCC or GND
3 V to 3.6 V
VI = VCC or GND
4.5
33V
3.3
pF
6.5
Co
Outputs
VO = VCC or GND
3.3 V
7
pF
† All typical values are at VCC = 3.3 V, TA = 25°C.
‡ This is the bus-hold maximum dynamic current. It is the minimum overdrive current required to switch the input from one state to another.
timing requirements over recommended operating free-air temperature range (unless otherwise
noted) (see Figures 1 through 3)
VCC = 1.8 V
tw
tsu
MIN
§
Pulse duration, LE high or low
Setup time, data before LE↑
th
Hold time, data after LE↑
§ This information was not available at time of publication.
MAX
VCC = 2.5 V
± 0.2 V
MIN
MAX
VCC = 2.7 V
MIN
MAX
VCC = 3.3 V
± 0.3 V
MIN
UNIT
MAX
3.3
3.3
3.3
ns
§
0.9
0.7
1.1
ns
§
1.2
1.5
1.1
ns
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SN74ALVCH16841
20-BIT BUS-INTERFACE D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES043D – JULY 1995 – REVISED FEBRUARY 1999
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figures 1 through 3)
FROM
(INPUT)
PARAMETER
TO
(OUTPUT)
D
tpd
d
Q
LE
ten
VCC = 1.8 V
Q
OE
tdis
Q
OE
† This information was not available at the time of publication.
VCC = 2.5 V
± 0.2 V
TYP
†
MIN
MAX
1
†
VCC = 2.7 V
MIN
VCC = 3.3 V
± 0.3 V
UNIT
MAX
MIN
MAX
5
4.7
1.2
3.9
1
5.6
5.1
1
4.3
†
1
6.2
6
1
4.9
ns
†
1.1
5.3
4.3
1.3
4.1
ns
ns
operating characteristics, TA = 25°C
PARAMETER
Cpd
d
Power dissipation
capacitance
TEST CONDITIONS
Outputs enabled
Outputs disabled
CL = 50 pF,
pF
VCC = 1.8 V
TYP
†
f = 10 MHz
† This information was not available at the time of publication.
6
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†
VCC = 2.5 V
TYP
VCC = 3.3 V
TYP
12
20
1
3
UNIT
pF
SN74ALVCH16841
20-BIT BUS-INTERFACE D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES043D – JULY 1995 – REVISED FEBRUARY 1999
PARAMETER MEASUREMENT INFORMATION
VCC = 1.8 V
2 × VCC
S1
1 kΩ
From Output
Under Test
Open
GND
CL = 30 pF
(see Note A)
1 kΩ
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
2 × VCC
GND
LOAD CIRCUIT
tw
VCC
Timing
Input
VCC/2
VCC/2
VCC/2
VCC/2
0V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VCC/2
VCC/2
0V
tPLH
Output
Control
(low-level
enabling)
tPLZ
VCC
VCC/2
tPZH
VOH
VCC/2
VOL
VCC/2
0V
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
tPHL
VCC/2
VCC
VCC/2
tPZL
VCC
Input
VOLTAGE WAVEFORMS
PULSE DURATION
th
VCC
Data
Input
VCC/2
0V
0V
tsu
Output
VCC
Input
Output
Waveform 2
S1 at GND
(see Note B)
VOL + 0.15 V
VOL
tPHZ
VCC/2
VOH
VOH – 0.15 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2 ns, tf ≤ 2 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
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SN74ALVCH16841
20-BIT BUS-INTERFACE D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES043D – JULY 1995 – REVISED FEBRUARY 1999
PARAMETER MEASUREMENT INFORMATION
VCC = 2.5 V ± 0.2 V
2 × VCC
S1
500 Ω
From Output
Under Test
Open
GND
CL = 30 pF
(see Note A)
500 Ω
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
2 × VCC
GND
LOAD CIRCUIT
tw
VCC
Timing
Input
VCC/2
VCC/2
VCC/2
VCC/2
0V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VCC/2
VCC/2
0V
tPLH
Output
Control
(low-level
enabling)
tPLZ
VCC
VCC/2
tPZH
VOH
VCC/2
VOL
VCC/2
0V
Output
Waveform 1
S1 at 2 × VCC
(see Note B)
tPHL
VCC/2
VCC
VCC/2
tPZL
VCC
Input
VOLTAGE WAVEFORMS
PULSE DURATION
th
VCC
Data
Input
VCC/2
0V
0V
tsu
Output
VCC
Input
Output
Waveform 2
S1 at GND
(see Note B)
VOL + 0.15 V
VOL
tPHZ
VCC/2
VOH
VOH – 0.15 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2 ns, tf ≤ 2 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 2. Load Circuit and Voltage Waveforms
8
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SN74ALVCH16841
20-BIT BUS-INTERFACE D-TYPE LATCH
WITH 3-STATE OUTPUTS
SCES043D – JULY 1995 – REVISED FEBRUARY 1999
PARAMETER MEASUREMENT INFORMATION
VCC = 2.7 V AND 3.3 V ± 0.3 V
6V
S1
500 Ω
From Output
Under Test
GND
CL = 50 pF
(see Note A)
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
6V
GND
Open
500 Ω
tw
LOAD CIRCUIT
2.7 V
2.7 V
Timing
Input
Input
1.5 V
1.5 V
1.5 V
0V
0V
tsu
VOLTAGE WAVEFORMS
PULSE DURATION
th
2.7 V
Data
Input
1.5 V
1.5 V
0V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
2.7 V
Output
Control
(low-level
enabling)
1.5 V
0V
tPZL
2.7 V
Input
1.5 V
1.5 V
0V
tPLH
1.5 V
tPLZ
3V
1.5 V
tPZH
VOH
Output
Output
Waveform 1
S1 at 6 V
(see Note B)
tPHL
1.5 V
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
1.5 V
Output
Waveform 2
S1 at GND
(see Note B)
VOL + 0.3 V
VOL
tPHZ
1.5 V
VOH
VOH – 0.3 V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 3. Load Circuit and Voltage Waveforms
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Copyright  1999, Texas Instruments Incorporated