CY2291FX Cypress Semiconductor Corp, CY2291FX Datasheet - Page 3

• Manufacturer Part Number: CY2291FX
• Description: IC 3PLL EPROM CLOCK GEN 20-SOIC
• Manufacturer: Cypress Semiconductor Corp
• Type: Clock Generator, Fanout Distributionr

Specifications of CY2291FX

• Number Of Circuits: 1
• Package / Case: 20-SOIC (7.5mm Width)
• Pll: Yes
• Input: Clock, Crystal
• Output: Clock, Crystal
• Ratio - Input:output: 1:8
• Differential - Input:output: No/No
• Frequency - Max: 66.6MHz, 90MHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3.3V, 5V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Frequency-max: 66.6MHz/90MHz
• Maximum Input Frequency: 30 MHz
• Minimum Input Frequency: 1 MHz
• Output Frequency Range: 0.076923 MHz to 90 MHz
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V, 5 V
• Clock Ic Type: PLL Clock Generator
• Frequency: 90MHz
• No. Of Outputs: 8
• Supply Current: 75mA
• Supply Voltage Range: 3V To 3.6V, 4.5V To 5.5V
• Digital Ic Case Style: SOIC
• No. Of Pins: 18
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: CY3093 - SOCKET ADAPTER FTG FOR CY2291F428-1457 - KIT DEV FTG PROGRAMMING KIT
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 428-2184-5; CY2291FX

Pinouts
Pin Definitions
Notes
Document Number: 38-07189 Rev. *E
1. For best accuracy, use a parallel-resonant crystal, C
2. Float XTALOUT pin if XTALIN is driven by reference clock (as opposed to crystal).
3. Please refer to application note “Understanding the CY2291, CY2292 and CY2295” for more information.
4. The CY2291 has weak pull downs on all outputs (except 32K). Hence, when a three-state condition is forced on the outputs, the output pins are pulled LOW.
SHUTDOWN/OE
XTALOUT
S2/SUSPEND
XTALIN
CPUCLK
32XOUT
VBATT
Name
CLKC
XBUF
CLKD
32XIN
CLKB
CLKA
CLKF
GND
VDD
32K
S0
S1
[1]
[1, 2]
Pin Number
4, 16
10
11
12
13
14
15
17
18
19
20
1
2
3
5
6
7
8
9
32.768-kHz crystal feedback.
32.768-kHz output (always active if VBATT is present).
Configurable clock output C.
Voltage supply.
Ground.
Reference crystal input or external reference clock input.
Reference crystal feedback.
Buffered reference clock output.
Configurable clock output D.
CPU frequency clock output.
Configurable clock output B.
Configurable clock output A.
Configurable clock output F.
CPU clock select input, bit 0.
CPU clock select input, bit 1.
CPU clock select input, bit 2. Optionally enables suspend feature when LOW.
Places outputs in three-state
places outputs in three-state
Battery supply for 32.768-kHz circuit.
32.768 kHz crystal input.
LOAD
 17 pF or 18 pF.
XTALOUT
Figure 1. CY2291- 20-pin SOIC
CPUCLK
32XOUT
XTALIN
CLKC
XBUF
CLKD
GND
32K
V DD
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
SHUTDOWN/OE
32XIN
V BATT
S2/SUSPEND
V DD
S1
S0
CLKF
CLKA
CLKB
[4]
[4]
condition and shuts down chip when LOW. Optionally, only
condition and does not shut down chip when LOW.
Description
CY2291
Page 3 of 17
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