• RAM-based internal structure allows for fast fall-through
time
• Asynchronous and simultaneous read and write
• Expandable by bit width
• Cascadable by word depth
• Half-Full and Almost-Full/Empty status flags
• IDT72413 is pin and functionally compatible with the
MMI67413
• High-speed data communications applications
• Bidirectional and rate buffer applications
• High-performance CMOS technology
• Available in plastic DIP, CERDIP and SOIC
• Military product compliant to MIL-STD-883, Class B
• Industrial temperature range (-40
o
C to +85oC) is avail-
able, tested to military electrical specifications
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION:
The IDT72413 is a 64 x 5, high-speed First-In/First-Out
(FIFO) that loads and empties data on a first-in-first-out basis.
It is expandable in bit width. All speed versions are cascadable in depth.
The FIFO has a Half-Full Flag, which signals when it has 32
or more words in memory. The Almost-Full/Empty Flag is
active when there are 56 or more words in memory or when
there are 8 or less words in memory.
The IDT72413 is pin and functionally compatible to the
MMI67413. It operates at a shift rate of 45MHz. This makes it
ideal for use in high-speed data buffering applications. The
IDT72413 can be used as a rate buffer, between two digital
systems of varying data rates, in high-speed tape drivers, hard
disk controllers, data communications controllers and
graphics controllers.
The IDT72413 is fabricated using IDTs high-performance
CMOS process. This process maintains the speed and high
output drive capability of TTL circuits in low-power CMOS.
Military grade product is manufactured in compliance with
the latest revision of MIL-STD-883, Class B.
OUPUT ENABLE
(OE)
DATA
IN
(D
0-4
)
(MR)
MASTER
RESET
IN
(IR)
(SI)
INPUT
READY
SHIFT
The IDT logo is a registered trademark of Integrated Device Technology,Inc.
FAST is a trademark of National Semiconductor, Inc.
FIFO
INPUT
STAGE
INPUT
CONTROL
LOGIC
64 x 5
MEMORY
ARRAY
REGISTER
CONTROL
LOGIC
FLAG
CONTROL
LOGIC
FIFO
OUTPUT
STAGE
OUTPUT
CONTROL
LOGIC
HALF-FULL (HF)
ALMOST-FULL/
EMPTY (AF/E)
(SO)
(OR)
DATA
(Q
0-4
SHIFT
OUT
OUPUT
READY
2748 drw 01
OUT
)
MILITARY AND COMMERCIAL TEMPERATURE RANGESDECEMBER 1996
For latest information contact IDT's web site at www.idt.com or fax-on-demand at 408-492-8391.
5.021
IDT72413
CMOS PARALLEL 64 x 5-BIT FIFO WITH FLAGSMILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATION
OE
HF
IR
SI
D
D
D
D
D
GND
1
2
3
4
P20-1,
C20-1,
5
0
6
1
2
3
4
7
8
9
10
SO20-2
DIP/SOIC
TOP VIEW
20
Vcc
19
AF/E
18
SO
17
OR
16
Q
&
15
14
13
12
11
0
1
Q
Q
2
Q
3
Q
4
MR
2748 drw 02
CAPACITANCE (TA = +25°C, f = 1.0MHz)
SymbolParameter
INInput CapacitanceVIN = 0V5pF
C
OUTOutput CapacitanceVOUT = 0V7pF
C
NOTE:2748 tbl 02
1. This parameter is sampled and not 100% tested.
2. Characterized values, not currently listed.
(1)
ConditionsMax.Unit
ABSOLUTE MAXIMUM RATINGS
(1)
SymbolRatingCommercialMilitaryUnit
V
TERMTerminal Voltage-0.5 to +7.0-0.5 to +7.0V
with Respect
to GND
T
AOperating0 to +70-55 to +125°C
Temperature
T
BIASTemperature-55 to +125-65 to +135°C
Under Bias
T
STGStorage-55 to +125-65 to +150°C
Temperature
OUTDC Output5050mA
I
Current
NOTE:2748 tbl 01
1. Stresses greater than those listed under ABSOLUTE MAXIMUM
RATINGS may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any other
conditions above those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
RECOMMENDED OPERATING CONDITIONS
SymbolParameterMin.Typ.Max. Unit
CCMilitary Supply4.55.05.5V
V
Voltage
CCCommercial Supply4.55.05.5V
V
Voltage
GNDSupply Voltage000V
IHInput High Voltage2.0——V
V
(1)
IL
V
NOTE:2748 tbl 03
1. 1.5V undershoots are allowed for 10ns once per cycle.
Input Low Voltage——0.8V
5.022
IDT72413
CMOS PARALLEL 64 x 5-BIT FIFO WITH FLAGSMILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS
(Commercial: VCC = 5.0V ± 10%, TA = 0°C to +70°C; Military: VCC = 5.0V ± 10%, TA = –55°C to +125°C)
OLLow-Level Output CurrentVCC = Min. IOL (Q0-4) Mil.12mA—0.4V
V
Com'l. 24mA
OL (IR, OR)
I
OL (HF, AF/E)8mA
I
OHHigh-Level Output CurrentVCC = Min. IOH (Q0-4)–4mA2.4—V
V
OH (IR, OR)–4mA
I
OH (HF, AF/E)–4mA
I
(2)
OS
I
HZOff-State Output CurrentVCC = Max. VO = 2.4V—20µA
I
LZVCC = Max. VO = 0.4V-20—
I
(3)
CC
I
Output Short-Circuit CurrentVCC = Max. VO = 0V-20-110mA
Supply CurrentVCC = Max., OE=HIGH Mil.—70mA
Inputs LOW, f=25MHz Com'l.—60
NOTES:2748 tbl 04
1. Care should be taken to minimize as much as possible the DC and capactive load on IR and OR when operating at frequencies above 25mHz.
2. Not more than one output should be shorted at a time and duration of the short circuit should not exceed one second. Guaranteed by design, but not
currently tested.
3. For frequencies greater than 25MHz, I
CC = 60mA + (1.5mA x [f - 25MHz]) commercial and ICC = 70mA + (1.5mA x [f - 25MHz]) military.
(1)
8mA
OPERATING CONDITIONS
(Commercial: VCC = 5.0V ± 10%, TA = 0°C to +70°C; Military: VCC = 5.0V ± 10%, TA = –55°C to +125°C)
1. Since the FIFO is a very high-speed device, care must be excercised in the design of the hardware and timing utilized within the design. Device grounding
and decoupling are crucial to correct operation as the FIFO will respond to very small glitches due to long reflective lines, high capacitances and/or poor
supply decoupling and grounding. A monolithic ceramic capacitor of 0.1µF directly between VCC and GND with very short lead length is recommended.
Shift in HIGH Time29—9—16—ns
(1)
Shift in LOW TIme211—17—20—ns
(1)
Shift Out HIGH Time59—9—16—ns
5.023
IDT72413
CMOS PARALLEL 64 x 5-BIT FIFO WITH FLAGSMILITARY AND COMMERCIAL TEMPERATURE RANGES
AC ELECTRICAL CHARACTERISTICS
(Commercial: VCC = 5.0V ± 10%, TA = 0°C to +70°C; Military: VCC = 5.0V ± 10%, TA = –55°C to +125°C)
1. Since the FIFO is a very high-speed device, care must be taken in the design of the hardware and the timing utilized within the design. Device grounding
and decoupling are crucial to correct operation as the FIFO will respond to very small glitches due to long reflective lines, high capacitances and/or poor
supply decoupling and grounding. A monolithic ceramic capacitor of 0.1µF directly between VCC and GND with very short lead length is recommended.
2. If the FIFO is full, (IR = HIGH),
3. Guaranteed by design but not currently tested.
Shift In ↑ to Input Ready LOW2—18—18—28ns
(1)
Shift In ↓ to Input Ready HIGH2—18—20—25ns
(1)
Shift Out ↓ to Output Ready LOW5—18—18—28ns
(1)
Shift Out ↓ to Output Ready HIGH5—19—20—25ns
(1)
Output Data Hold Previous Word55—5—5—ns
(3)
Master Reset ↑ to Input Ready HIGH8—25—28—30ns
(2)
Master Reset ↓ to Input Ready LOW8—25—28—30ns
(3)
Input Ready Pulse HIGH45—5—5—ns
(3)
Ouput Ready Pulse HIGH75—5—5—ns
(3)
Output Ready ↑ HIGH to Valid Data5—5—5—7ns
(3)
Output Disable Delay12—12—12—15ns
(3)
(3)
Output Enable Delay12—15—15—20ns
(3)
MR ↓ forces IR to go LOW, and MR ↑ causes IR to go HIGH.
12—12—12—15
12—15—15—20
5.024
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