CY7C464A-10JI

Manufacturer Part NumberCY7C464A-10JI
ManufacturerQP SEMICONDUCTOR
CY7C464A-10JI datasheet
 


Specifications of CY7C464A-10JI

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Asynchronous, Cascadable 8K/16K/32K/64K x9 FIFOs
Features
• High-speed, low-power, first-in first-out (FIFO)
memories
• 8K x 9 FIFO (CY7C460A)
• 16K x 9 FIFO (CY7C462A)
• 32K x 9 FIFO (CY7C464A)
• 64K x 9 FIFO (CY7C466A)
• 10-ns access times, 20-ns read/write cycle times
• High-speed 50-MHz read/write independent of
depth/width
• Low operating power
— I
= 60 mA
CC
— I
=8 mA
SB
• Asynchronous read/write
• Empty and Full flags
• Half Full flag (in standalone mode)
• Retransmit (in standalone mode)
• TTL-compatible
• Width and Depth Expansion Capability
• 5V
10% supply
• PLCC, LCC, 300-mil and 600-mil DIP packaging
• Three-state outputs
• Pin compatible density upgrade to CY7C42X/46X family
• Pin compatible and functionally equivalent to IDT7205,
IDT7206, IDT7207, IDT7208
Logic Block Diagram
DATAINPUTS
(D
0
WRITE
W
CONTROL
DUAL PORT
RAM ARRAY
8K x 9
WRITE
16K x 9
POINTER
32K x
64K x 9
THREE–
STATE
BUFFERS
DATAOUTPUTS
(Q
-Q
0
READ
R
CONTROL
FLAG
LOGIC
EXPANSION
LOGIC
XI
Cypress Semiconductor Corporation
Document #: 38-06011 Rev. *A
Functional Description
The CY7C460A, CY7C462A, CY7C464A, and CY7C466A are
respectively, 8K, 16K, 32K, and 64K words by 9-bit wide first-in
first-out (FIFO) memories. Each FIFO memory is organized
such that the data is read in the same sequential order that it
was written. Full and Empty flags are provided to prevent over-
run and underrun. Three additional pins are also provided to
facilitate unlimited expansion in width, depth, or both. The
depth expansion technique steers the control signals from one
device to another by passing tokens.
The read and write operations may be asynchronous; each
can occur at a rate of up to 50 MHz. The write operation occurs
when the Write (W) signal is LOW. Read occurs when Read
(R) goes LOW. The nine data outputs go to the high-imped-
ance state when R is HIGH.
A Half Full (HF) output flag is provided that is valid in the stan-
dalone (single device) and width expansion configurations. In
the depth expansion configuration, this pin provides the ex-
pansion out (XO) information that is used to tell the next FIFO
that it will be activated.
In the standalone and width expansion configurations, a LOW
on the Retransmit (RT) input causes the FIFOs to retransmit
the data. Read Enable (R) and Write Enable (W) must both be
HIGH during a retransmit cycle, and then R is used to access
the data.
The CY7C460A, CY7C462A, CY7C464A, and CY7C466A are
fabricated using Cypress’s advanced 0.5µ RAM3 CMOS tech-
nology. Input ESD protection is greater than 2000V and
latch-up is prevented by careful layout and the use of guard
rings.
Pin Configurations
PLCC/LCC
D
)
8
Top View
4
3
D
2
5
D
6
1
READ
D
7
0
POINTER
XI
9
8
FF
9
Q
10
0
Q
11
1
NC
12
Q
13
2
14 15 16 17 18 19 20
)
8
MR
RESET
LOGIC
FL/RT
EF
FF
XO/HF
C46XA–1
3901 North First Street
CY7C460A/CY7C462A
CY7C464A/CY7C466A
DIP
Top View
W
1
D
2
8
2
1
32 31 30
D
D
3
29
6
3
D
28
D
4
7
2
NC
27
D
5
1
7C460A
7C460A
FL/RT
26
D
6
0
7C462A
7C462A
MR
25
XI
7C464A
7
7C464A
7C466A
7C466A
EF
24
FF
8
Q
23
XO/HF
9
0
Q
22
Q
7
10
1
Q
21
6
Q
11
2
Q
12
3
Q
13
8
GND
14
C46XA–2
San Jose
CA 95134
408-943-2600
Revised December 26, 2002
V
28
CC
27
D
4
26
D
5
D
25
6
D
24
7
FL/RT
23
MR
22
21
EF
20
XO/HF
Q
19
7
Q
18
6
Q
17
5
Q
16
4
R
15
C46XA–3

CY7C464A-10JI Summary of contents

  • Page 1

    ... Read Enable (R) and Write Enable (W) must both be HIGH during a retransmit cycle, and then R is used to access the data. The CY7C460A, CY7C462A, CY7C464A, and CY7C466A are fabricated using Cypress’s advanced 0.5µ RAM3 CMOS tech- nology. Input ESD protection is greater than 2000V and latch-up is prevented by careful layout and the use of guard rings ...

  • Page 2

    ... V = Min 8 GND < V < > GND < V < Max mA, Freq MHz OUT All Inputs = V min. IH Test Conditions MHz 4.5V CC CY7C460A/CY7C462A CY7C464A/CY7C466A 7C460A-15 7C460A-25 7C462A-15 7C462A-25 7C464A-15 7C464A-25 7C466A-15 7C466A- Ambient Temperature 10% – + 10% – +125 C 5V 10% 7C460A/462A/464A/466A (-10,-15,-25) Min. Max. Unit 2.4 0.4 2 ...

  • Page 3

    ... HZR DVR Document #: 38-06011 Rev 500 333 INCLUDING JIG AND C460A–5 SCOPE (b) 2V [3, 6] 7C460A-10 7C462A-10 7C464A-10 7C466A-10 Min. Max CY7C460A/CY7C462A CY7C464A/CY7C466A ALL INPUT PULSES 3.0V 90% 90% GND 10 7C460A-15 7C460A-25 7C462A-15 7C462A-25 7C464A-15 7C464A-25 7C466A-15 7C466A-25 Min. Max. Min. Max ...

  • Page 4

    ... HIGH t Effective Write Pulse WPF Width After FF HIGH t Expansion Out LOW XOL Delay from Clock t Expansion Out HIGH XOH Delay from Clock Document #: 38-06011 Rev. *A CY7C460A/CY7C462A CY7C464A/CY7C466A [3, 6] (continued) 7C460A-10 7C460A-15 7C462A-10 7C462A-15 7C464A-10 7C464A-15 7C466A-10 7C466A-15 Min. Max. Min. Max. ...

  • Page 5

    ... MSRC PMR RMR Document #: 38-06011 Rev DVR DATA VALID DATA VALID [10] t MRSC t PMR t EFL t HFH t FFH HALF FULL+1 t WHF CY7C460A/CY7C462A CY7C464A/CY7C466A t HZR DATA VALID DATA VALID t RPW t WPW t RMR HALF FULL t RHF C460A–7 C460A–8 C460A–9 Page ...

  • Page 6

    ... CY7C46x-20 (Military), whose flags will be valid after t Document #: 38-06011 Rev. *A ADDITIONAL FIRST READ READS t RFF ADDITIONAL FIRST WRITE WRITES t WEF t RTC t PRT t RTR + 10 ns. RTC CY7C460A/CY7C462A CY7C464A/CY7C466A FIRST WRITE C460A–10 FIRST READ VALID C460A–11 C460A–12 , except for the RTC Page ...

  • Page 7

    ... Full Flag and Write Data Flow-Through Mode DATA DATA OUT DATA VALID Empty Flag and Read Data Flow-Through Mode DATA DATA OUT Document #: 38-06011 Rev WAF WPF t WFF t RFF DATA VALID RAE t RPE t REF t WEF HWZ DATA VALID CY7C460A/CY7C462A CY7C464A/CY7C466A t HD C460A–13 C460A–14 Page ...

  • Page 8

    ... The retransmit feature is beneficial when transferring packets of data. It enables the receipt of data to be acknowledged by the receiver and retransmitted if necessary. The retransmit after the rising RHF (RT) input is active in the standalone and width expansion modes. The retransmit feature is intended for use when a CY7C460A/CY7C462A CY7C464A/CY7C466A DATA VALID t HZR ...

  • Page 9

    ... FF is created by ORing the FFs together. Likewise, a composite EF is created by ORing EFs together. HF and RT functions are not available in depth expansion mode CY7C460A CY7C462A CY7C464A CY7C466A CY7C460A CY7C462A CY7C464A CY7C466A CY7C460A 9 CY7C462A CY7C464A CY7C466A FIRST DEVICE Figure 1. Depth Expansion CY7C460A/CY7C462A CY7C464A/CY7C466A 0 EMPTY C460A–17 Page ...

  • Page 10

    ... CY7C462A-10JI 15 CY7C462A-15JC CY7C462A-15PC CY7C462A-15PTC 25 CY7C462A-25JC CY7C462A-25PC CY7C462A-25PTC 32K x 9 Asynchronous FIFO Speed (ns) Ordering Code 10 CY7C464A-10JC CY7C464A-10PC CY7C464A-10PTC CY7C464A-10JI 15 CY7C464A-15JC CY7C464A-15PC CY7C464A-15PTC CY7C464A-15LMB 25 CY7C464A-25JC CY7C464A-25PC CY7C464A-25PTC Document #: 38-06011 Rev. *A Package Name Package Type J65 32-Lead Plastic Leaded Chip Carrier P15 28-Lead (600-Mil) Molded DIP ...

  • Page 11

    ... Molded DIP P21 28-Lead (300-Mil) Molded DIP L55 32-Pin Rectangular Leadless Chip Carrier J65 32-Lead Plastic Leaded Chip Carrier P15 28-Lead (600-Mil) Molded DIP P21 28-Lead (300-Mil) Molded DIP CY7C460A/CY7C462A CY7C464A/CY7C466A Operating Range Commercial Industrial Commercial Military Commercial Page ...

  • Page 12

    ... MILITARY SPECIFICATIONS Group A Subgroup Testing DC Characteristics Parameter Subgroups Max SB1 SB2 Document #: 38-06011 Rev. *A CY7C460A/CY7C462A CY7C464A/CY7C466A Switching Characteristics Parameter Subgroups 10, 11 LZR t 9, 10, 11 DVR t 9, 10, 11 HZR 10, 11 HWZ 10, 11 MRSC t 9, 10, 11 ...

  • Page 13

    ... Package Diagrams Document #: 38-06011 Rev. *A 32-Lead Plastic Leaded Chip Carrier J65 32-Pin Rectangular Leadless Chip Carrier L55 MIL-STD-1835 C-12 CY7C460A/CY7C462A CY7C464A/CY7C466A 51-85002-B 51-80068 Page ...

  • Page 14

    ... The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges. 28-Lead (600-Mil) Molded DIP P15 28-Lead (300-Mil) Molded DIP P21 CY7C460A/CY7C462A CY7C464A/CY7C466A 51-85017-A 51-85014-B Page ...

  • Page 15

    ... Document Title: CY7C460A, CY7C462A, CY7C646A, CY7C466A Asynchronous, Cascadable 8K/16K/32K/64K X 9 FIFOs Document Number: 38-06011 Issue REV. ECN NO. Date ** 106472 09/10/01 *A 122263 12/26/02 Document #: 38-06011 Rev. *A Orig. of Change Description of Change SZV Change from Spec number 38-00627 to 38-06011 RBI Power up requirements added to Maximum Ratings Information CY7C460A/CY7C462A CY7C464A/CY7C466A Page ...