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Commercial/ Industrial
PEELTM 22CV10AZ -25 CMOS Programmable Electrically Erasable Logic Device
Features
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Ultra Low Power Operation - VCC = 5 Volts 10% - Icc = 10 A (typical) at standby - Icc = 2 mA (typical) at 1 MHz - tPD = 25ns. CMOS Electrically Erasable Technology - Superior factory testing - Reprogrammable in plastic package - Reduces retrofit and development costs Development/Programmer Support - Third party software and programmers - ICT PLACE Development Software and PDS-3 programmer
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Architectural Flexibility - 133 product terms x 44 input AND array - Up to 22 inputs and 10 I/O pins - 12 possible macrocell configurations - Synchronous preset, asynchronous clear - Independent output enables - Programmable clock source and polarity - 24-pin DIP/SOIC/TSSOP and 28-pin PLCC Application Versatility - Replaces random logic - Pin and JEDEC compatible with 22V10 - Ideal for power-sensitive systems
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General Description
The PEELTM22CV10AZ is a Programmable Electrically Erasable Logic (PEELTM) device that provides a low power alternative to ordinary PLDs. The PEELTM22CV10AZ is available in 24-pin DIP SOIC, TSSOP and 28-pin PLCC , packages (see Figure 19). A "zero-power" (100A max. ICC) standby mode makes the PEELTM22CV10AZ ideal for power sensitive applications such as handheld meters, portable communication equipment and laptop computers/ peripherals. EE-reprogrammability provides the convenience of instant reprogramming for development and a reusable production inventory minimizing the impact of programming changes or errors. EEreprogrammability also improves factory testability, thus ensuring the highest quality possible. The PEELTM22CV10AZ is JEDEC file compatible with standard 22V10 PLDs. Eight additional configurations per macrocell (a total of 12) are also available by using the "+" software/programming option (i.e., 22CV10AZ+). The additional macrocell configurations allow more logic to be put into every device, potentially reducing the design's component count and lowering the power requirements even further. Development and programming support for the PEELTM22CV10AZ is provided by popular third-party programmers and development software. ICT also offers free PLACE development software and a low-cost development system (PDS-3).
Figure 19 Pin Configuration
I/CLK I I I I I I I I I I GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I
Figure 19 Block Diagram
DIP
TSSOP
PLCC
SOIC
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PEELTM 22CV10AZ
(OPTIONAL)
132 0
ASYNCHRONOUS CLEAR (TO ALL MACROCELLS)
2
9
MACRO CELL
I/O
(27)
I/CLK
(2)
10
20
MACRO CELL
I/O
(26)
I
(3)
21
MACRO CELL
33
I/O
(25)
I
(4)
34
MACRO CELL
48
I/O
(24)
I
49
(5)
MACRO CELL
65
I/O
(23)
I
(6)
66
MACRO CELL
82
I/O
(21)
I
(7)
83
MACRO CELL
97
I/O
(20)
I
(9)
98
MACRO CELL
110
I/O
(19)
I
(10)
111
121
MACRO CELL
I/O
(18)
I
(11)
124
130
I
(12)
131
MACRO CELL
SYNCHRONOUS PRESET (TO ALL MACROCELLS)
I/O
(17)
I
(13) (16)
I
Figure 21 PEELTM22CV10AZ Logic Array Diagram
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PEELTM 22CV10AZ
Function Description
The implements logic functions as sum-of-products expressions in a programmable-AND/fixed-OR logic array. Userdefined functions are created by programming the connections of input signals into the array. User-configurable output structures in the form of I/O macrocells further increase logic flexibility. When programming the PEELTM22CV10AZ, the device programmer first performs a bulk erase to remove the previous pattern. The erase cycle opens every logical connection in the array. The device is configured to perform the user-defined function by programming selected connections in the AND array. (Note that PEELTM device programmers automatically program all of the connections on unused product terms so that they will have no effect on the output function).
Architecture Overview
The architecture is illustrated in the block diagram of Figure 19. Twelve dedicated inputs and 10 I/Os provide up to 22 inputs and 10 outputs for creating logic functions (see Figure 21). At the core of the device is a programmable electrically-erasable AND array that drives a fixed OR array. With this structure, the PEELTM22CV10AZ can implement up to 10 sum-of-products logic expressions. Associated with each of the ten OR functions is an I/O macrocell that can be independently programmed to one of four different configurations in standard 22V10 mode, or any one of 12 configurations using the special "Plus" mode. The programmable macrocells allow each I/O to be used to create sequential or combinatorial logic functions of activehigh or active-low polarity, while providing three different feedback paths into the AND array.
Variable Product Term Distribution
The PEELTM22CV10AZ provides 120 product terms to drive the 10 OR functions. These product terms are distributed among the outputs in groups of 8, 10, 12, 14, and 16 to form logical sums (see Figure 21). This distribution allows optimum use of the device resources.
Programmable I/O Macrocell
The unique twelve-configuration output macrocell provides complete control over the architecture of each output. The ability to configure each output independently lets you to tailor the configuration of the PEELTM22CV10AZ to the precise requirements of your design.
Macrocell Architecture
Each I/O macrocell, as shown in Figure 20, consists of a Dtype flip-flop and two signal-select multiplexers. The configuration of the macrocell is determined by four EEPROM bits that control the multiplexers. These bits determine the output polarity, output type (registered or non-registered) and input-feedback path (bidirectional I/O, combinatorial feedback). Refer to Table 1. for details. Four of these macrocells duplicate the functionality of the industry-standard PAL22V10. (See Figure 21 and Table 1.)
AND/OR Logic Array
The programmable AND array of the PEELTM22CV10AZ (shown in Figure 21) is formed by input lines intersecting product terms. The input lines and product terms are used as follows:
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44 Input Lines: - 24 input lines carry the true and complement of the signals applied to the 12 input pins - 20 additional lines carry the true and complement values of feedback or input signals from the 10 I/Os
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133 Product Terms: - 120 product terms (arranged in 2 groups of 8, 10, 12, 14, and 16) are used to form sum of product functions - 10 output enable terms (one for each I/O) - 1 global synchronous preset term - 1 global asynchronous clear term - 1 programmable clock term
Figure 20 Block Diagram of the PEELTM22CV10A I/O Macrocell
At each input-line/product-term intersection, there is an EEPROM memory cell that determines whether or not there is a logical connection at that intersection. Each product term is essentially a 44-input AND gate. A product term that is connected to both the true and complement of an input signal will always be FALSE and therefore will not affect the OR function that it drives. When all the connections on a product term are opened, a "don't care" state exists and that term will always be TRUE.
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PEELTM 22CV10AZ
In addition to emulating the four PAL-type output structures (configurations 3, 4, 9, and 10), The macrocell provides eight additional configurations. Equivalent circuits for the twelve macrocell configurations are illustrated in Figure 22. These structures are accessed by specifying the PEELTM22CV10A+ or PEELTM22CV10A++ option when assembling the equations.
Output Polarity
Each macrocell can be configured to implement active-high or active-low logic. Programmable polarity eliminates the need for external inverters.
Output Enable
The output of each I/O macrocell can be enabled or disabled under the control of its associated programmable output enable product term. When the logical conditions programmed on the output enable term are satisfied, the output signal is propagated to the I/O pin. Otherwise, the output buffer is switched into the high-impedance state. Under the control of the output enable term, the I/O pin can function as a dedicated input, a dedicated output, or a bidirectional I/O. Opening every connection on the output enable term will permanently enable the output buffer and yield a dedicated output. Conversely, if every connection is intact, the enable term will always be logically false and the I/O will function as a dedicated input.
Figure 21 Equivalent Circuits for the Four Configurations of the I/O Macrocell
Input/Feedback Select
When configuring an I/O macrocell to implement a registered function (configurations 1 and 2 in Figure 21), the Q output of the flip-flop drives the feedback term. When configuring an I/O macrocell to implement a combinatorial output (configurations 3 and 4 in Figure 21), the feedback term is taken from the I/O pin. In this case, the pin can be used as a dedicated input or a bi-directional I/O (Refer also to Table 1.)
Table 1. PEELTM22CV10A Macrocell Configuration Bits
Configuration #
1 2 3 4
A
0 1 0
B
0 0 1
Input/Feedback Select
Register Feedback Bi-Directional I/O
Output Select
Programmable Clock Options
Active Low Register Active High Active Low Combinatorial Active High
A unique feature of the PEELTM22CV10AZ is a programmable clock multiplexer that allows you to select true or complement forms of either the input pin or a product-term clock source. This feature can be accessed by specifying the PEELTM22CV10A++ option when assembling the equations.
When creating a PEELTM device design, the desired macrocell configuration is generally specified explicitly in the design file. When the design is assembled or compiled, the macrocell configuration bits are defined in the last lines of the JEDEC programming file.
Output Type
The signal from the OR array can be fed directly to the output pin (combinatorial function) or latched in the D-type flipflop (registered function). The D-type flip-flop latches data on the rising edge of the clock and is controlled by the global preset and clear terms. When the synchronous preset term is satisfied, the Q output of the register is set HIGH at the next rising edge of the clock input. Satisfying the asynchronous clear sets Q LOW, regardless of the clock state. If both terms are satisfied simultaneously, the clear will override the preset.
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PEELTM 22CV10AZ
Figure 22 Equivalent Circuits for the Twelve Configurations of the PEELTM22CV10AZ+ I/O Macrocell
Table 1. I/O Macrocell Equivalent Circuits
Configuration #
1 2 3 4 5 6 7 8 9 10 11 12
A
0 1 0 1 0 1 0 1 0 1 0 1
B
0 0 1 1 0 0 1 1 0 0 1 1
C
1 1 0 0 1 1 1 1 0 0 1 1
D
0 0 0 0 1 1 1 1 0 0 0 0
Input/Feedback Select
Register Bi-directional I/O
Output Select
Active Low Active High Active Low Active High Active Low Active High Active Low Active High Active Low Active High Active Low Active High
Combinatorial Register Combinatorial Feedback Combinatorial Register Register Feedback Combinatorial
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PEELTM 22CV10AZ
Zero Power Feature
The CMOS PEELTM22CV10AZ features "Zero-Power" standby operation for ultra-low power consumption. With the "Zero-Power" feature, transition-detection circuitry monitors the inputs, I/Os (including CLK) and feedbacks. If these signals do not change for a period of time greater than approximately two tPDs, the outputs are latched in their current state and the device automatically powers down. When the next signal transition is detected, the device will "wake up" for active operation until the signals stop switching long enough to trigger the next power-down. As a result of the "Zero-Power" feature, significant power savings can be realized for combinatorial or sequential operations when the inputs or clock change at a modest rate (see Figure 23).
Design Security
The PEELTM22CV10AZ provides a special EEPROM security bit that prevents unauthorized reading or copying of designs programmed into the device. The security bit is set by the PLD programmer, either at the conclusion of the programming cycle or as a separate step, after the device has been programmed. Once the security bit is set it is impossible to verify (read) or program the PEELTM until the entire device has first been erased with the bulk-erase function.
Signature Word
The signature word feature allows a 64-bit code to be programmed into the PEELTM22CV10AZ if the PEELTM22CV10AZ+ software option is used. The code can be read back even after the security bit has been set. The signature word can be used to identify the pattern programmed into the device or to record the design revision, etc.
Figure 23 Typical ICC vs. Input Clock Frequency for the 22CV10AZ.
22CV10AZ Frequency vs. ICC
100
Programming Support
ICT's JEDEC file translator allows easy conversion of existing 24 pin PLD designs to the PEELTM22CV10AZ, without the need for redesign. ICT supports a broad range of popular third party design entry systems, including Data I/O Synario and Abel, Logical Devices CUPL and others. ICT also offers (for free) its proprietary PLACE software, an easy-to-use entry level PC-based software development system. Programming support includes all the popular third party programmers; Data I/O, Logical Devices, and numerous others. ICT also provides a low cost development programmer system, the PDS-3.
10
ICC in mA.
1
0.1
0.01
0.001 0.001
0.01
0.1
1
10
Frequency in MHz
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PEELTM 22CV10AZ
This device has been designed and tested for the specified operating ranges. Proper operation outside of these levels is not guaranteed. Exposure to absolute maximum ratings may cause permanent damage.
Table 1. Absolute Maximum Ratings Symbol
VCC VI, VO IO TST TLT
Parameter
Supply Voltage Voltage Applied to Any Output Current Storage Temperature Lead Temperature Pin2 Relative to
Conditions
Relative to Ground Ground1
Rating
-0.5 to + 7.0 -0.5 to VCC + 0.6 25 -65 to +150 +300
Unit
V V mA C C
Per Pin (IOL, IOH) Soldering 10 Seconds
Table 2. Operating Range Symbol
Vcc TA TR TF TRVCC
Parameter
Supply Voltage Ambient Temperature Clock Rise Time Clock Fall TIme VCC Rise Time Commercial Industrial Commercial Industrial See Note 3. See Note 3. See Note 3.
Conditions
Min
4.75 4.5 0 -40
Max
5.25 5.5 +70 +85 20 20 250
Unit
V V C C ns ns ms
Table 3. D.C. Electrical Characteristics Over the operating range (Unless otherwise specified) Symbol
VOH VOHC VOL VOLC VIH VIL IIL ISC ICCS ICC10 CIN7 COUT7
Parameter
Output HIGH Voltage - TTL Output HIGH Voltage - CMOS Output LOW Voltage - TTL Output LOW Voltage - CMOS Input HIGH Voltage Input LOW Voltage Input and I/O Leakage Current Output Short Circuit Current VCC Current, Standby VCC Current, f=1MHz Input Capacitance Output Capacitance
Conditions
VCC = Min, IOH = -4.0 mA VCC = Min, IOH = -10.0 A VCC = Min, IOL = 16.0 mA VCC = Min, IOL = 10.0 A
Min
2.4 VCC - 0.3
Max
Unit
V V
0.5 0.15 2.0 -0.3 VCC + 0.3 0.8 10 -30 10 (typ) 2 (typ) -135 100 5 6 12
V V V V A mA A mA pF pF
VCC = Max, GND VIN VCC, I/O = High Z VCC = Max, VO = 0.5V, TA = 25C VIN = 0V or VCC, All Outputs disabled4 VIN = 0V or VCC, All Outputs disabled4 TA = 25C, VCC = 5.0V @ f = 1 MHz
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PEELTM 22CV10AZ
Table 10. Symbol
tPD tOE tOD tCO1 tCO2
tCF tSC tHC tCL, tCH tCP fMAX1 fMAX2 fMAX3 tAW tAP tAR tRESET
Over the operating range 8
Parameter
Input5 to non-registered output Input5 to output enable6
-25 Min Max
25 25 25 15 35 9 15 0 13 30 41.6 33.3 38.4 25 25 25 5
Units
ns ns ns ns ns ns ns ns ns ns MHz MHz MHz ns ns ns s
Input5 to output disable6 Clock to Output Clock to comb. output delay via internal registered feedback Clock to Feedback Input5 or feedback setup to clock Input hold after clock Clock low time, clock high time8 Min clock period Ext (tSC + tCO1) Internal feedback (1/tSC+tCF) 11
5
External Feedback (1/tCP)11 No Feedback (1/tCL+tCH)11
Asynchronous Reset Pulse Width Input to Asynchronous Reset Asynchronous Reset recovery time Power-on reset time for registers in clear state12
Switching Waveforms
Inputs, I/O, Registered Feedback, Synchronous Preset Clock Asynchronous Reset Registered Outputs Combinatorial Outputs
Notes:
1. Minimum DC input is -0.5V, however, inputs may undershoot to -2.0V for periods less than 20 ns. 2. VI and VO are not specified for program/verify operation. 3. Test Points for Clock and VCC in tR and tF are referenced at the 10% and 90% levels. 4. I/O pins are 0V and VCC. 5. "Input" refers to an input pin signal. 6. tOE is measured from input transition to VREF0.1V, TOD is measured from input transition to VOH-0.1V or VOL+0.1V; VREF=VL. 7. Capacitances are tested on a sample basis. 8. Test conditions assume: signal transition times of 3ns or less from the 10% and 90% points, timing reference levels of 1.5V (Unless otherwise specified). 9. Test one output at a time for a duration of less than 1 second. 10. ICC for a typical application: This parameter is tested with the device programmed as a 10-bit Counter. 11. Parameters are not 100% tested. Specifications are based on initial characterization and are tested after any design process modification that might affect operational frequency. 12. All inputs at GND.
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PEELTM 22CV10AZ
PEELTM Device and Array Test Loads
Standard Load 5V Thevenin Equivalent VL
R1 Output Output
RL
CL
R2
CL
Technology
CMOS TTL
R1
480k 235
R2
480k 159
RL
228k 95
VL
2.375V 2.02V
CL
33 pF 33 pF
Ordering Information Part Number
PEEL22CV10AZP-25 PEEL22CV10AZJ-25 PEEL22CV10AZS-25 PEEL22CV10AZT-25 PEEL22CV10AZPI-25 PEEL22CV10AZJI-25 PEEL22CV10AZSI-25 PEEL22CV10AZTI-25
Speed
25ns 25ns 25ns 25ns 25ns 25ns 25ns 25ns
Temperature
Commercial Commercial Commercial Commercial Industrial Industrial Industrial Industrial
Package
24-pin Plastic DIP 28-pin PLCC 24-pin SOIC 24-pin TSSOP 24-pin Plastic DIP 28-pin PLCC 24-pin SOIC 24-pin TSSOP
Part Number
Suffix Device PEELTM 22CV10AZ PI-25 Speed -25 = 25ns tpd Package P = 24-pin Plastic 300mil DIP J = 28-pin Plastic (J) Leaded Chip Carrier (PLCC) S = 24-pin SOIC 300 mil Gullwing T = 24-pin TSSOP 170 mil Temperature Range (Blank) = Commercial 0 to +70C I = Industrial -40 to +85C
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PEELTM 22CV10AZ
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