72605L20 데이터 시트보기 (PDF) - Integrated Device Technology
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72605L20 Datasheet PDF : 20 Pages
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IDT72605/IDT72615 CMOS SyncBiFIFO
256 x 18 x 2 and 512 x 18 x 2
COMMERCIAL TEMPERATURE RANGE
PIN DESCRIPTION (Continued)
Symbol
Name
FFBA
B→A Full Flag
BYPB
RS
VCC
GND
Port B Bypass
Flag
Reset
Power
Ground
I/O
Description
O When FFBA is LOW, the B→A FIFO is full and further data writes into Port B are inhibited.
When FFBA is HIGH, the FIFO is not full. FFBA is synchronized to CLKB. In bypass mode,
FFBA tells Port B that a message is waiting in Port A’s output register. If FFBA is LOW, a
bypass message is in the register. If FFBA is HIGH, Port A has read the message and another
message can be written into Port B.
O This flag informs Port B that the Synchronous BiFIFO is in bypass mode. When BYPB is
LOW, Port A has placed the FIFO into bypass mode. If BYPB is HIGH, the Synchronous
BiFIFO passes data into memory. BYPB is synchronized to CLKB.
I A LOW on this pin will perform a reset of all Synchronous BiFIFO functions.
There are three +5V power pins for the PLCC and PGA packages and two for the TQFP.
There are seven ground pins for the PLCC and PGA packages and four for the TQFP.
ABSOLUTE MAXIMUM RATINGS(1)
RECOMMENDED DC
OPERATING CONDITIONS
2704 tbl 02
Symbol
Rating
Com’l.
VTERM Terminal Voltage
with Respect
to Ground
–0.5 to +7.0
TA
Operating
Temperature
0 to +70
TBIAS Temperature
Under Bias
–55 to +125
TSTG Storage
Temperature
–55 to +125
IOUT DC Output Current
50
Mil.
Unit
–0.5 to +7.0 V
–55 to +125 °C
–65 to +135 °C
–65 to +150 °C
50
mA
Symbol
Parameter
Min. Typ. Max. Unit
VCC
Supply Voltage
4.5 5.0 5.5 V
GND
Supply Voltage
00 0V
VIH
Input High Voltage
2.0 — — V
VIL(1)
Input Low Voltage
— — 0.8 V
NOTE:
1. 1.5V undershoots are allowed for 10ns once per cycle.
2704 tbl 04
CAPACITANCE (TA = +25°C, F = 1.0MHz)
NOTE:
2704 tbl 03
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS 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.
Symbol
Parameter
Conditions
CIN(2)
Input Capacitance VIN = 0V
COUT(1,2) Output Capacitance VOUT = 0V
NOTES:
1. With output deselected.
2. Characterized values, not currently tested.
Max. Unit
10 pF
10 pF
2704 tbl 05
DC ELECTRICAL CHARACTERISTICS
(Commercial: VCC = 5V ± 10%, TA = 0°C to +70°C)
Symbol
Parameter
IIL(1)
IOL(2)
VOH
VOL
ICC(3)
Input Leakage Current (Any Input)
Output Leakage Current
Output Logic "1" Voltage IOUT = –2mA
Output Logic "0" Voltage IOUT = 8mA
Average VCC Power Supply Current
NOTES:
1. Measurements with 0.4V ≤ VIN ≤ VCC.
2. OEA, OEB ≥ VIH; 0.4 ≤ VOUT ≤ VCC.
3. Tested with outputs open. Testing frequency f=20MHz
Min.
–1
–10
2.4
—
—
IDT72615L
IDT72605L
Commercial
tCLK = 20, 25, 35, 50ns
Typ.
—
—
—
—
—
Max.
1
10
—
0.4
230
Unit
µA
µA
V
V
mA
2704 tbl 06
5.18
5
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