9403ADCQR [NSC]

IC 16 X 4 OTHER FIFO, CDIP24, CERAMIC, DIP-24, FIFO;
9403ADCQR
型号: 9403ADCQR
厂家: National Semiconductor    National Semiconductor
描述:

IC 16 X 4 OTHER FIFO, CDIP24, CERAMIC, DIP-24, FIFO

先进先出芯片 CD 内存集成电路
文件: 总20页 (文件大小:334K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
April 1989  
9403A  
First-In First-Out (FIFO) Buffer Memory  
General Description  
Features  
Y
Serial or parallel input  
The 9403A is an expandable fall-through type high-speed  
First-In First-Out (FIFO) Buffer Memory optimized for high-  
speed disk or tape controllers and communication buffer  
applications. It is organized as 16-words by 4-bits and may  
be expanded to any number of words or any number of bits  
in multiples of four. Data may be entered or extracted asyn-  
chronously in serial or parallel, allowing economical imple-  
mentation of buffer memories.  
Y
Serial or parallel output  
Y
Expandable without external logic  
Y
TRI-STATE outputs  
Y
Fully compatible with all TTL families  
Y
Slim 24-pin package  
The 9403A has TRI-STATE outputs which provide added  
É
versatility and is fully compatible with all TTL families.  
Connection Diagrams  
Pin Assignment  
for DIP, SOIC and Flatpak  
Pin Assignment  
for LCC and PCC  
TL/F/10193–1  
TL/F/10193–2  
FASTÉ and TRI-STATEÉ are registered trademarks of National Semiconductor Corporation.  
C
1995 National Semiconductor Corporation  
TL/F/10193  
RRD-B30M105/Printed in U. S. A.  
Logic Symbol  
TL/F/10193–3  
Unit Loading/Fan Out  
U.L.  
Input I /I  
IH IL  
Pin Names  
Description  
HIGH/LOW  
Output I /I  
OH OL  
D D  
0
Parallel Data Inputs  
Serial Data Input  
2.0/0.667  
2.0/0.667  
2.0/0.667  
2.0/0.667  
2.0/0.667  
2.0/0.667  
2.0/0.667  
2.0/0.667  
2.0/0.667  
2.0/0.667  
2.0/0.667  
2.0/0.667  
285/26.7  
285/26.7  
20/13.3  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
40 mA/400 mA  
5.7 mA/16 mA  
5.7 mA/16 mA  
3
D
S
PL  
Parallel Load Input  
Serial Input Clock  
Serial Input Enable  
Transfer to Stack Input  
Serial Output Enable  
Transfer Out Serial  
Transfer Out Parallel  
Master Reset  
CPSI  
IES  
TTS  
OES  
TOS  
TOP  
MR  
OE  
Output Enable  
CPSO  
Q Q  
Serial Output Clock  
Parallel Data Outputs  
Serial Data Output  
Input Register Full  
Output Register Empty  
0
3
Q
S
b
IRF  
400 mA/8 mA  
400 mA/8 mA  
b
ORE  
20/13.3  
2
Block Diagram  
TL/F/10193–4  
Functional Description  
As shown in the block diagram the 9403A consists of three  
sections:  
the F flip-flop and resetting the other flip-flops. The Q out-  
3
put of the last flip-flop (FC) is brought out as the ‘Input Reg-  
ister Full’ output (IRF). After initialization this output is HIGH.  
1. An Input Register with parallel and serial data inputs as  
well as control inputs and outputs for input handshaking  
and expansion.  
Parallel EntryÐA HIGH on the PL input loads the D D  
0
3
inputs into the F F flip-flops and sets the FC flip-flop. This  
0
3
forces the IRF output LOW indicating that the input register  
is full. During parallel entry, the CPSI input must be LOW. If  
parallel expansion is not being implemented, IES must be  
LOW to establish row mastership (see Expansion section).  
2. A 4-bit wide, 14-word deep fall-through stack with self-  
contained control logic.  
3. An Output Register with parallel and serial data outputs  
as well as control inputs and outputs for output hand-  
shaking and expansion.  
Serial EntryÐData on the D input is serially entered into  
S
the F , F , F , F , FC shift register on each HIGH-to-LOW  
3
2
1
0
Since these three sections operate asynchronously and al-  
most independently, they will be described separately be-  
low.  
transition of the CPSI clock input, provided IES and PL are  
LOW.  
After the fourth clock transition, the four data bits are locat-  
ed in the four flip-flops, F F . The FC flip-flop is set, forc-  
INPUT REGISTER (DATA ENTRY)  
0
3
The Input Register can receive data in either bit-serial or in  
4-bit parallel form. It stores this data until it is sent to the fall-  
through stack and generates the necessary status and con-  
trol signals.  
ing the IRF output LOW and internally inhibiting CPSI clock  
pulses from affecting the register, Figure 2 illustrates the  
final positions in a 9403A resulting from a 64-bit serial bit  
train. B is the first bit, B the last bit.  
63  
0
Figure 1 is a conceptual logic diagram of the input section.  
As described later, this 5-bit register is initialized by setting  
3
Functional Description (Continued)  
TL/F/10193–5  
FIGURE 1. Conceptual Input Section  
through’ action. If the top location of the stack is empty,  
data is loaded into the stack and the input register is re-ini-  
tialized. Note that this initialization is postponed until PL is  
LOW again. Thus, automatic FIFO action is achieved by  
connecting the IRF output to the TTS input.  
An RS Flip-Flop (the Request Initialization Flip-Flop shown  
in Figure 10 ) in the control section records the fact that  
data has been transferred to the stack. This prevents multi-  
ple entry of the same word into the stack despite the fact  
the IRF and TTS may still be LOW. The Request Initializa-  
tion Flip-Flop is not cleared until PL goes LOW. Once in the  
stack, data falls through the stack automatically, pausing  
only when it is necessary to wait for an empty next location.  
In the 9403A as in most modern FIFO designs, the MR input  
only initializes the stack control section and does not clear  
the data.  
OUTPUT REGISTER (DATA EXTRACTION)  
The Output Register receives 4-bit data words from the bot-  
tom stack location, stores it and outputs data on a TRI-  
STATE 4-bit parallel data bus or on a TRI-STATE serial data  
bus. The output section generates and receives the neces-  
sary status and control signals. Figure 3 is a conceptual  
logic diagram of the output section.  
TL/F/10193–6  
FIGURE 2. Final Positions in a 9403A Resulting from a  
64-Bit Serial Train  
Transfer to the StackÐThe outputs of Flip-Flops F F  
0
3
feed the stack. A LOW level on the TTS input initiates a ‘fall-  
4
Functional Description (Continued)  
TL/F/10193–7  
FIGURE 3. Conceptual Output Section  
Parallel Data ExtractionÐWhen the FIFO is empty after a  
LOW pulse is applied to MR, the Output Register Empty  
(ORE) output is LOW. After data has been entered into the  
FIFO and has fallen through to the bottom stack location, it  
is transferred into the Output Register provided the ‘Trans-  
fer Out Parallel’ (TOP) input is HIGH. As a result of the data  
transfer ORE goes HIGH, indicating valid data on the data  
outputs (provided the TRI-STATE buffer is enabled). TOP  
can now be used to clock out the next word. When TOP  
goes LOW, ORE will go LOW indicating that the output data  
has been extracted, but the data itself remains on the output  
bus until the next HIGH level at TOP permits the transfer of  
the next word (if available) into the Output Register. During  
parallel data extraction CPSO should be LOW. TOS should  
be grounded for single slice operation or connected to the  
appropriate ORE for expanded operation (see Expansion  
section).  
control circuitry prevents the same data from being trans-  
ferred twice. If TOP goes HIGH and returns to LOW before  
data is available from the stack, ORE remains LOW indicat-  
ing that there is no valid data at the outputs.  
Serial Data ExtractionÐWhen the FIFO is empty after a  
LOW pulse is applied to MR, the Output Register Empty  
(ORE) output is LOW. After data has been entered into the  
FIFO and has fallen through to the bottom stack location, it  
is transferred into the Output Register provided TOS is LOW  
and TOP is HIGH. As a result of the data transfer ORE goes  
HIGH indicating valid data in the register. The TRI-STATE  
Serial Data Output, Q , is automatically enabled and puts  
S
the first data bit on the output bus. Data is serially shifted  
out on the HIGH-to-LOW transition of CPSO. To prevent  
false shifting, CPSO should be LOW when the new word is  
being loaded into the Output Register. The fourth transition  
empties the shift register, forces ORE output LOW and dis-  
TOP is not edge triggered. Therefore, if TOP goes HIGH  
before data is available from the stack, but data does be-  
come available before TOP goes LOW again, that data will  
be transferred into the Output Register. However, internal  
ables the serial output, Q (refer to Figure 3 ). For serial  
S
operation the ORE output may be tied to the TOS input,  
requesting a new word from the stack as soon as the previ-  
ous one has been shifted out.  
5
Functional Description (Continued)  
EXPANSION  
a
(15n 1)-words by 4-bits can be constructed, where n is the  
number of devices. Note that expansion does not sacrifice  
any of the 9403A’s flexibility for serial/parallel input and out-  
put.  
Vertical ExpansionÐThe 9403A may be vertically expand-  
ed to store more words without external parts. The intercon-  
nection is necessary to form a 46-word by 4-bit FIFO are  
shown in Figure 4. Using the same technique, and FIFO of  
TL/F/10193–8  
FIGURE 4. A Vertical Expansion Scheme  
6
Functional Description (Continued)  
Horizontal ExpansionÐThe 9403A can also be horizontal-  
ly expanded to store long words (in multiples of four bits)  
without external logic. The interconnections necessary to  
form a 16-word by 12-bit FIFO are shown in Figure 5. Using  
the same technique, any FIFO of 16 words by 4n bits can be  
constructed, where n is the number of devices. The IRF  
output of the right most device (most significant device) is  
connected to the TTS inputs of all devices. Similarly, the  
ORE output of the most significant device is connected to  
the TOS inputs of all devices. As in the vertical expansion  
scheme, horizontal expansion does not sacrifice any of the  
9403A’s flexibility for serial/parallel input and output.  
master in their row. No slave in a given row will initialize its  
Input Register until it has received LOW on its IES input  
from a row master or a slave of higher priority.  
In a similar fashion, the ORE outputs of slaves will not go  
HIGH until their OES inputs have gone HIGH. This interlock-  
ing scheme ensures that new input data may be accepted  
by the array when the IRF output of the final slave in that  
row goes HIGH and that output data for the array may be  
extracted when the ORE of the final slave in the output row  
goes HIGH.  
The row master is established by connecting its IES input to  
ground while a slave receives its IES input from the IRF  
output of the next higher priority device. When an array of  
9403A FIFOs is initialized with a LOW on the MR inputs of  
all devices, the IRF outputs of all devices will be HIGH.  
Thus, only the row master receives a LOW on the IES input  
during initialization. Figure 10 is a conceptual logic diagram  
of the internal circuitry which determines master/slave oper-  
ation. Whenever MR and IES are LOW, the Master Latch is  
set. Whenever TTS goes LOW the Request Initialization  
Flip-Flop will be set. If the Master Latch is HIGH, the Input  
Register will be immediately initialized and the Request Ini-  
tialization Flip-Flop reset. If the Master Latch is reset, the  
Input Register is not initialized until IES goes LOW. In array  
operation, activating the TTS initiates a ripple input register  
initialization from the row master to the last slave.  
Horizontal and Vertical ExpansionÐThe 9403A can be  
expanded in both the horizontal and vertical directions with-  
out any external parts and without sacrificing any of its FI-  
FO’s flexibility for serial/parallel input and output. The inter-  
connections necessary to form a 31-word by 16-bit FIFO are  
shown in Figure 6. Using the same technique, any FIFO of  
a
(15m 1)-words by (4n)-bits can be constructed, where m is  
the number of devices in a column and n is the number of  
devices in a row. Figures 7 and 8 show the timing diagrams  
for serial data entry and extraction for the 31-word by 16-bit  
FIFO shown in Figure 6. The final position of data after seri-  
al insertion of 496 bits into the FIFO array of Figure 6 is  
shown in Figure 9.  
Interlocking CircuitryÐMost conventional FIFO designs  
provide status signals analogous to IRF and ORE. However,  
when these devices are operated in arrays, variations in unit  
to unit operating speed require external gating to assure all  
devices have completed an operation. The 9403A incorpo-  
rates simple but effective ‘master/slave’ interlocking circuit-  
ry to eliminate the need for external gating.  
A similar operation takes place for the output register. Either  
a TOS or TOP input initiates a load-from-stack operation  
and sets the ORE Request Flip-Flop. If the Master Latch is  
set, the last Output Register Flip-Flop is set and ORE goes  
HIGH. If the Master Latch is reset, the ORE output will be  
LOW until an OES input is received.  
In the 9403A array of Figure 6 devices 1 and 5 are defined  
as ‘row masters’ and the other devices are slaves to the  
TL/F/10193–9  
FIGURE 5. A Horizontal Expansion Scheme  
7
Functional Description (Continued)  
TL/F/1019310  
FIGURE 6. A 31 x 16 FIFO Array  
8
Functional Description (Continued)  
TL/F/1019311  
FIGURE 7. Serial Data Entry for Array ofFigure 6  
TL/F/1019312  
FIGURE 8. Serial Data Extraction for Array ofFigure 6  
9
Functional Description (Continued)  
TL/F/1019313  
FIGURE 9. Final Position of a 496-Bit Serial Input  
TL/F/1019314  
FIGURE 10. Conceptual Diagram, Interlocking Circuitry  
10  
Absolute Maximum Ratings (Note 1)  
If Military/Aerospace specified devices are required,  
please contact the National Semiconductor Sales  
Office/Distributors for availability and specifications.  
Recommended Operating  
Conditions  
Free Air Ambient Temperature  
Military  
Commercial  
b
a
55 C to 125 C  
§
0 C to 70 C  
§
b
b
b
a
65 C to 150 C  
Storage Temperature  
§
§
§
§
a
§
§
a
55 C to 125 C  
Ambient Temperature under Bias  
Junction Temperature under Bias  
§
Supply Voltage  
Military  
Commercial  
a
55 C to 175 C  
a
a
a
4.5V to 5.5V  
a
4.5V to 5.5V  
§
V
Pin Potential to  
CC  
Ground Pin  
b
a
0.5V to 7.0V  
b
a
0.5V to 7.0V  
Input Voltage (Note 2)  
Input Current (Note 2)  
Voltage Applied to Output  
b
a
30 mA to 5.0 mA  
e
in HIGH State (with V  
Standard Output  
TRI-STATE Output  
0V)  
CC  
b
0.5V to 5.5V  
0.5V to V  
CC  
b
a
Current Applied to Output  
in LOW State (Max)  
twice the rated I (mA)  
OL  
Note 1: Absolute maximum ratings are values beyond which the device may  
be damaged or have its useful life impaired. Functional operation under  
these conditions is not implied.  
Note 2: Either voltage limit or current limit is sufficient to protect inputs.  
DC Electrical Characteristics  
Symbol  
Parameter  
Input HIGH Voltage  
Min  
Typ  
Max  
Units  
V
Conditions  
CC  
V
V
V
V
2.0  
V
V
V
Recognized as a HIGH Signal  
Recognized as a LOW Signal  
IH  
Input LOW Voltage  
0.8  
IL  
b
e b  
18 mA  
Input Clamp Diode Voltage  
1.5  
Min  
Min  
I
CD  
OH  
IN  
e b  
e b  
e b  
e b  
Output HIGH  
Voltage  
54F 10% V  
2.4  
2.4  
2.4  
2.4  
I
I
I
I
400 mA (IRF, ORE)  
2.0 mA (Q , Q )  
CC  
CC  
CC  
CC  
OH  
OH  
OH  
OH  
54F 10% V  
74F 10% V  
74F 10% V  
n
s
V
V
400 mA (IRF, ORE)  
5.7 mA (Q , Q )  
n
s
e
e
e
e
V
OL  
Output LOW  
Voltage  
54F 10% V  
54F 10% V  
74F 10% V  
74F 10% V  
0.4  
I
I
I
I
4 mA (IRF, ORE)  
8 mA (Q , Q )  
CC  
CC  
CC  
CC  
OL  
OL  
OL  
OL  
0.4  
0.5  
0.5  
n
s
Min  
8 mA (IRF, ORE)  
16 mA (Q , Q )  
n
s
e
e
I
I
Input HIGH Current  
40  
mA  
mA  
Max  
Max  
V
V
2.7V  
7.0V  
IH  
IN  
IN  
Input HIGH Current  
Breakdown Test  
BVI  
100  
b
e
I
I
I
I
I
I
Input LOW Current  
0.45  
mA  
mA  
mA  
mA  
mA  
mA  
Max  
Max  
Max  
Max  
Max  
Max  
V
V
V
V
V
V
0.4V  
IL  
IN  
e
Output Leakage Current  
Output Leakage Current  
Output Short-Circuit Current  
Output HIGH Leakage Current  
Power Supply Current  
100  
2.4V  
0.5V  
0V  
OZH  
OZL  
OS  
OUT  
OUT  
OUT  
OUT  
b
e
e
e
100  
130  
b
b
30  
250  
170  
V
CC  
CEX  
CCL  
e
LOW  
O
11  
AC Electrical Characteristics  
Comm  
Mil  
CC  
Comm  
e a  
T
25 C  
§
5.0V  
A
e
e
50 pF  
T
, V  
Mil  
T
A
, V  
Com  
Fig.  
No.  
A
CC  
e
e a  
Symbol  
Parameter  
V
Units  
CC  
e
C
50 pF  
C
L
L
e
C
50 pF  
L
Min  
Max  
Min  
Max  
Min  
Max  
t
t
Propagation Delay,  
Negative-Going  
PHL  
1.5  
20.0  
1.5  
29.0  
46.0  
1.5  
21.0  
38.0  
CPSI to IRF Output  
ns  
9403A-a,b  
Propagation Delay,  
Negative-Going  
TTS to IRF  
PLH  
1.5  
36.0  
1.5  
1.5  
t
t
Propagation Delay,  
Negative-Going  
1.5  
1.5  
28.0  
28.0  
1.5  
1.5  
33.0  
33.0  
1.5  
1.5  
29.0  
29.0  
PLH  
ns  
nsd  
ns  
9403A-c, d  
9403A-e  
PHL  
CPSO to Q Output  
S
t
t
Propagation Delay,  
Positive-Going  
1.5  
1.5  
46.0  
46.0  
1.5  
1.5  
53.0  
53.0  
1.5  
1.5  
48.0  
48.0  
PLH  
PHL  
TOP to Outputs Q Q  
0
3
t
t
t
t
t
t
Propagation Delay,  
Negative-Going  
CPSO to ORE  
PHL  
PHL  
PLH  
PLH  
PHL  
PLH  
1.5  
1.5  
1.5  
1.5  
1.5  
1.5  
35.0  
37.0  
47.0  
42.5  
28.0  
24.0  
1.5  
1.5  
1.5  
1.5  
1.5  
1.5  
41.0  
45.0  
53.0  
50.0  
36.0  
29.0  
1.5  
1.5  
1.5  
1.5  
1.5  
1.5  
37.0  
39.0  
49.0  
45.0  
29.0  
25.0  
9403A-c, d  
Propagation Delay,  
Negative-Going  
TOP to ORE  
ns  
9403A-e  
Propagation Delay,  
Positive-Going  
TOP to ORE  
Propagation Delay,  
Negative-Going  
ns  
ns  
9403A-c, d  
9403A-g, h  
TOS to Positive Going ORE  
Propagation Delay,  
Positive-Going  
PL to Negative-Going IRF  
Propagation Delay,  
Negative-Going  
PL to Positive-Going IRF  
12  
AC Electrical Characteristics  
74F  
54F  
74F  
e a  
T
25 C  
§
5.0V  
A
e
50 pF  
e
T
, V  
CC  
e
Mil  
T
, V  
Com  
e
50 pF  
Fig.  
No.  
A
A CC  
e a  
Symbol  
Parameter  
V
Units  
CC  
C
C
L
L
e
C
50 pF  
L
Min  
Max  
Min  
Max  
Min  
Max  
t
t
Propagation Delay,  
Positive-Going  
OES to ORE  
PLH  
PLH  
1.5  
39.5  
1.5  
38.0  
1.5  
41.0  
21.0  
ns  
ns  
Propagation Delay,  
Positive-Going  
1.5  
20.0  
1.5  
25.0  
1.5  
9403A-h  
IES to Positive-Going IRF  
t
t
Propagation Delay,  
MR to IRF  
PLH  
PHL  
1.5  
1.5  
20.0  
33.0  
1.5  
1.5  
20.0  
43.0  
1.5  
1.5  
20.0  
35.0  
ns  
ns  
Propagation Delay,  
MR to ORE  
t
t
Propagation Delay,  
1.5  
1.5  
14.0  
14.0  
1.0  
1.0  
25.0  
25.0  
1.5  
1.5  
14.0  
14.0  
PZH  
PZL  
OE to Q , Q , Q , Q  
2
0
1
3
ns  
ns  
t
t
Propagation Delay,  
OE to Q , Q , Q , Q  
1.5  
1.5  
14.0  
14.0  
1.0  
1.0  
25.0  
25.0  
1.5  
1.5  
14.0  
14.0  
PHZ  
PLZ  
0
1
2
3
t
t
Propagation Delay,  
Negative-Going  
1.5  
1.5  
16.5  
17.0  
1.0  
1.0  
30.0  
30.0  
1.5  
1.5  
17.0  
17.0  
PZH  
PZL  
OES to Q  
S
t
t
Propagation Delay,  
Negative-Going  
1.5  
1.5  
14.0  
14.0  
1.0  
1.0  
30.0  
30.0  
1.5  
1.5  
14.0  
14.0  
PHZ  
PLZ  
OES to Q  
S
t
t
Turn On Time  
TOS to Q  
1.5  
1.5  
60.0  
60.0  
1.5  
1.5  
60.0  
60.0  
1.5  
1.5  
60.0  
60.0  
PZH  
PZL  
ns  
ns  
s
t
t
Fall Through Time  
Parallel Appearance Time,  
ORE to Q Q  
500  
6.5  
500  
500  
7.0  
9403A-f  
DFT  
AP  
b
b
b
19.0  
20.0  
20.0  
10.0  
20.0  
10.0  
0
3
ns  
ns  
t
t
Serial Appearance Time,  
ORE to Q  
AS  
b
b
b
9.5  
14.5  
470  
25.0  
500  
15.0  
500  
S
Bubble-Up Time  
DBU  
13  
AC Operating Requirements  
74F  
54F  
74F  
e a  
T
A
25 C  
Fig.  
No.  
§
5.0V  
e
e
Symbol  
Parameter  
T
, V  
CC  
Mil  
T
, V  
A CC  
Com  
Max  
Units  
A
e a  
V
CC  
Min  
Max  
Min  
Max  
Min  
t (H)  
s
Set-up Time HIGH or LOW  
15.5  
15.5  
30.0  
30.0  
16.0  
16.0  
t (L)  
s
D to Negative CPSI  
s
ns  
9403A-a, b  
t (H)  
h
Hold Time, HIGH or LOW  
D to CPSI  
s
2.0  
2.0  
8.0  
8.0  
2.0  
2.0  
t (L)  
h
t (L)  
s
Set-up Time, LOW  
18.0  
65.0  
50.0  
18.0  
70.0  
ns  
ns  
9403A-b  
9403A-b  
Negative-Going IES to CPSI  
t (L)  
s
Set-up Time, LOW  
110.0  
Negative-Going TTS to CPSI  
t (H)  
s
Set-up Time, HIGH or LOW  
Parallel Inputs to PL  
0
0
1.0  
1.0  
0
0
t (L)  
s
ns  
t (H)  
h
Hold Time, HIGH or LOW  
Parallel Inputs to PL  
0
0
6.0  
6.0  
0
0
t (L)  
h
t
t
(H)  
(L)  
CPSI Pulse Width  
HIGH or LOW  
30  
20  
52.0  
25.0  
32  
20  
w
ns  
ns  
ns  
ns  
ns  
9403A-a, b  
9403A-g, h  
w
t
(H)  
PL Pulse Width, HIGH  
16.5  
16.0  
15.0  
20.0  
20.0  
20.0  
17.0  
17.0  
15.0  
w
w
t
(L)  
TTS Pulse Width, LOW  
Serial or Parallel Mode  
9403A-a, b,  
c, d  
t
w
(L)  
MR Pulse Width, LOW  
9403A-f  
9403A-e  
t
t
(H)  
(L)  
TOP Pulse Width  
HIGH or LOW  
15.0  
15.0  
22.0  
20.0  
17.0  
15.0  
w
w
t
t
(H)  
(L)  
CPSO Pulse Width  
HIGH or LOW  
17.0  
17.0  
20.0  
20.0  
17.0  
18.0  
w
ns  
ns  
9403A-c, d  
9403A-f  
w
t
Recovery Time  
MR to Any Input  
rec  
16.5  
25.0  
19.0  
14  
Timing Waveforms  
TL/F/1019315  
Conditions: stack not full, IES, PL LOW  
FIGURE 9403A-a. Serial Input, Unexpanded or Master Operation  
TL/F/1019316  
Conditions: stack not full, IES HIGH when initiated, PL LOW  
FIGURE 9403A-b. Serial Input, Expanded Slave Operation  
TL/F/1019317  
Conditions: data in stack, TOP HIGH, IES LOW when initiated, OES LOW  
FIGURE 9403A-c. Serial Output, Unexpanded or Master Operation  
15  
Timing Waveforms (Continued)  
TL/F/1019318  
Conditions: data in stack, TOP HIGH, IES HIGH when initiated  
FIGURE 9403A-d. Serial Output, Slave Operation  
TL/F/1019319  
Conditions: IES LOW when initiated, OE, CPSO LOW; data available in stack  
FIGURE 9403A-e. Parallel Output, 4-Bit Word or Master in Parallel Expansion  
TL/F/1019320  
Conditions: TTS connected to IRF, TOS connected to ORE, IES, OES, OE, CPSO LOW, TOP HIGH  
FIGURE 9403A-f. Fall Through Time  
16  
Timing Waveforms (Continued)  
TL/F/1019321  
Conditions: stack not full, IES LOW when initialized  
FIGURE 9403A-g. Parallel Load Mode, 4-Bit Word (Unexpanded) or Master in Parallel Expansion  
TL/F/1019322  
Conditions: stack not full, device initialized (Note 1) with IES HIGH  
FIGURE 9403A-h. Parallel Load, Slave Mode  
Note 1: Initialization requires a master reset to occur after power has been applied.  
Note 2: TTS normally connected to IRF.  
Note 3: If stack is full, IRF will stay LOW.  
17  
Order Information  
The device number is used to form part of a simplified purchasing code where the package type and temperature range are  
defined as follows:  
TL/F/1019323  
18  
Physical Dimensions inches (millimeters)  
28 Terminal Ceramic Leadless Chip Carrier (L)  
NS Package Number E28A  
24-Lead Ceramic Dual-In-Line Package (D)  
NS Package Number J24A  
19  
Ý
Lit. 103753  
Physical Dimensions inches (millimeters) (Continued)  
24-Lead Slim (0.300 Wide) Ceramic Dual-In-Line Package (SD)  
×
NS Package Number J24F  
LIFE SUPPORT POLICY  
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT  
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL  
SEMICONDUCTOR CORPORATION. As used herein:  
1. Life support devices or systems are devices or  
systems which, (a) are intended for surgical implant  
into the body, or (b) support or sustain life, and whose  
failure to perform, when properly used in accordance  
with instructions for use provided in the labeling, can  
be reasonably expected to result in a significant injury  
to the user.  
2. A critical component is any component of a life  
support device or system whose failure to perform can  
be reasonably expected to cause the failure of the life  
support device or system, or to affect its safety or  
effectiveness.  
National Semiconductor  
Corporation  
National Semiconductor  
Europe  
National Semiconductor  
Hong Kong Ltd.  
National Semiconductor  
Japan Ltd.  
a
1111 West Bardin Road  
Arlington, TX 76017  
Tel: 1(800) 272-9959  
Fax: 1(800) 737-7018  
Fax:  
(
49) 0-180-530 85 86  
@
13th Floor, Straight Block,  
Ocean Centre, 5 Canton Rd.  
Tsimshatsui, Kowloon  
Hong Kong  
Tel: (852) 2737-1600  
Fax: (852) 2736-9960  
Tel: 81-043-299-2309  
Fax: 81-043-299-2408  
Email: cnjwge tevm2.nsc.com  
a
a
a
a
Deutsch Tel:  
English Tel:  
Fran3ais Tel:  
Italiano Tel:  
(
(
(
(
49) 0-180-530 85 85  
49) 0-180-532 78 32  
49) 0-180-532 93 58  
49) 0-180-534 16 80  
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.  

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