CY7C4292V-15ASCT Cypress Semiconductor, CY7C4292V-15ASCT Datasheet

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CY7C4292V-15ASCT

Manufacturer Part Number
CY7C4292V-15ASCT
Description
Manufacturer
Cypress Semiconductor
Datasheet
Cypress Semiconductor Corporation
Document #: 38-06014 Rev. *B
Features
• 3.3V operation for low power consumption and easy
• High-speed, low-power, first-in first-out (FIFO)
• 64K × 9 (CY7C4282V)
• 128K × 9 (CY7C4292V)
• 0.35 micron CMOS for optimum speed/power
• High-speed, Near-Zero Latency (True Dual-Ported
• Low power
• Fully asynchronous and simultaneous read and write
• Empty, Full, and Programmable Almost Empty and
• Retransmit function
• Output Enable (OE) pin
• Independent read and write enable pins
• Supports free-running 50% duty cycle clock inputs
• Width Expansion Capability
• Depth Expansion Capability through token-passing
• 64-pin 10 × 10 STQFP
• Pin-compatible 3.3V solution for CY7C4282/92
Logic Block Diagram
integration into low-voltage systems
memories
Memory Cell), 100-MHz operation (10 ns read/write
cycle times)
operation
Almost Full status flags
scheme (no external logic required)
— I
— I
CC
SB
= 6 mA
= 25 mA
PAF/XO
FL/RT
XI/LD
RS
WCLK
EXPANSION
CONTROL
POINTER
LOGIC
RESET
WRITE
WRITE
LOGIC
WEN
64K/128K x 9 Low-Voltage Deep Sync FIFOs
3901 North First Street
OUTPUT REGISTER
with Retransmit and Depth Expansion
THREE-STATE
RAM Array
128K x 9
REGISTER
Dual Port
64K x 9
Q
INPUT
D
0
0–8
8
Functional Description
The CY7C4282V/92V are high-speed, low-power, FIFO
memories with clocked read and write interfaces. All devices
are nine bits wide. The CY7C4282V/92V can be cascaded to
increase FIFO depth. Programmable features include Almost
Full/Almost Empty flags. These FIFOs provide solutions for a
wide variety of data buffering needs, including high-speed data
acquisition, multiprocessor interfaces, video and communica-
tions buffering.
These FIFOs have 9-bit input and output ports that are
controlled by separate clock and enable signals. The input port
is controlled by a free-running clock (WCLK) and a Write
Enable pin (WEN).
Retransmit and Synchronous Almost Full/Almost Empty flag
features are available on these devices.
Depth expansion is possible using the Cascade Input (XI),
Cascade Output (XO), and First Load (FL) pins. The XO pin is
connected to the XI pin of the next device, and the XO pin of
the last device should be connected to the XI pin of the first
device. The FL pin of the first device is tied to VSS and the FL
pin of all the remaining devices should be tied to VCC
When WEN is asserted, data is written into the FIFO on the
rising edge of the WCLK signal. While WEN is held active, data
is continually written into the FIFO on each cycle. The output
port is controlled in a similar manner by a free-running Read
Clock (RCLK) and a Read Enable pin (REN). In addition, the
CY7C4282V/92V have an Output Enable pin (OE). The read
and write clocks may be tied together for single-clock
operation or the two clocks may be run independently for
asynchronous read/write applications. Clock frequencies up to
67 MHz are achievable.
OE
RCLK
PROGRAM
REGISTER
CONTROL
POINTER
FLAG
LOGIC
READ
FLAG
READ
REN
San Jose
FF
EF
PAE
PAF/XO
,
CA 95134
Revised August 22, 2003
CY7C4282V
CY7C4292V
408-943-2600
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CY7C4292V-15ASCT Summary of contents

Page 1

... High-speed, low-power, first-in first-out (FIFO) memories • 64K × 9 (CY7C4282V) • 128K × 9 (CY7C4292V) • 0.35 micron CMOS for optimum speed/power • High-speed, Near-Zero Latency (True Dual-Ported Memory Cell), 100-MHz operation (10 ns read/write cycle times) • ...

Page 2

... Empty. When LD is LOW, RCLK reads data out of the programmable flag-offset register. CY7C4282V CY7C4292V GND GND N GND FL/RT N/C 7C4282V/92V-25 Unit 66.7 40 MHz CY7C4292V Page [+] Feedback ...

Page 3

... The second, third, and fourth LOW-to-HIGH transitions of WCLK store data in the empty offset most significant bit (MSB) register, full offset LSB register, and full offset MSB register, respectively, when LD CY7C4282V CY7C4292V standard mode or width expansion, FL outputs 0-8 ...

Page 4

... LOW when the number of unread words in the FIFO (MSB) is greater than or equal to CY7C4282V (64K – m) and Default Value = 000h CY7C4292V (128K – m). PAF is set HIGH by the LOW-to- HIGH transition of WCLK when the number of available 0 memory locations is greater than m. Full Offset (LSB) Reg ...

Page 5

... Figure 2). In this configuration, the Load (LD) pin is set to LOW at Reset so that the pin operates as a control to load and read the programmable flag offsets. RESET (RS) 9 7C4282V 7C4292V FIRST LOAD (FL) EXPANSION IN (XI) Used in a Width-Expansion Configuration CY7C4282V CY7C4292V FF PAF PAE ...

Page 6

... D 7C4292V RCLK WCLK REN WEN OE RS 7C4282V D 7C4292V READ CLOCK (RCLK) XO WCLK RCLK READ ENABLE (REN) WEN REN OUTPUTENABLE (OE) RS 7C4282V OE 7C4292V CY7C4282V CY7C4292V DATA OUT (Q) EF Page [+] Feedback ...

Page 7

... Com’l 25 Ind Com’l 6 Ind Test Conditions MHz 3.3V CC [10, 11] 3.0V R2=510 GND 3 ns 2.0V CY7C4282V CY7C4292V +0.5V CC [6] Ambient Temperature +70 C 3.3V 300 +85 C 3.3V 300 mV 7C4282V/92V 7C4282V/92V -15 -25 Min. Max. Min. Max. Unit 2.4 2.4 V 0.4 0 ...

Page 8

... CY7C4282V CY7C4292V 90% 10 7C4282V/92V -15 -25 Max. Min. Max. Unit 66.7 40 MHz ...

Page 9

... NO OPERATION t REF VALID DATA t OE [15] t SKEW1 , then FF may not change state until the next WCLK rising edge. SKEW1 , then EF may not change state until the next RCLK rising edge. SKEW2 CY7C4282V CY7C4292V NO OPERATION t WFF REF t OHZ Page [+] Feedback ...

Page 10

... RSS RSR t RSF t RSF t RSF [19] t FRL t REF OLZ When t < minimum specification, t CLK SKEW2 SKEW1 CY7C4282V CY7C4292V [18] OE=1 OE [20 (maximum) = either 2 FRL CLK SKEW1 CLK SKEW1 Page [+] Feedback ...

Page 11

... Document #: 38-06014 Rev DATA WRITE 2 t ENS REF REF SKEW2 t A [14 SKEW1 DATA WRITE t WFF t ENS DATA READ CY7C4282V CY7C4292V t ENH [19] t FRL t REF DATA READ NO WRITE DATA WRITE t WFF t ENH t A NEXT DATA READ Page [+] Feedback ...

Page 12

... ENH 22 Note t PAE t ENS Note 24 t CLKL t t ENS ENH t PAF t t ENS (m 1) words of the FIFO when PAF goes LOW. CY7C4282V CY7C4292V WORDS 23 Note IN FIFO t PAE t t ENS ENH FULL M WORDS [25] IN FIFO [26] t PAF SKEW2 t t ENS ENH ...

Page 13

... CLKL t ENH t DH PAE OFFSET PAF OFFSET LSB MSB t CLKL t ENH t A UNKNOWN PAE OFFSET LSB t PRT to update these flags. RTR CY7C4282V CY7C4292V PAF OFFSET LSB MSB PAF OFFSET MSB PAF OFFSET PAE OFFSET MSB LSB t RTR . RTR Page [+] Feedback ...

Page 14

... A64 64-Lead 10x10 Thin Quad Flatpack Package Name Package Type A64 64-Lead 10x10 Thin Quad Flatpack A64 64-Lead 10x10 Thin Quad Flatpack A64 64-Lead 10x10 Thin Quad Flatpack CY7C4282V CY7C4292V Operating Range Commercial Commercial Industrial Operating Range Commercial Commercial Industrial 51-85051-*A ...

Page 15

... Document History Page Document Title: CY7C4282V/CY7C4292V 64K/128K x 9 Low-Voltage Deep Sync FIFOs with Retransmit and Depth Expansion Document Number: 38-06014 REV. ECN NO. Issue Date ** 106475 09/15/01 *A 122266 12/26/02 *B 127859 08/25/03 Document #: 38-06014 Rev. *B Orig. of Change Description of Change SZV Change from Spec number: 38-00657 to 38-06014 ...

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