Datasheet AV9148F-20, ICS9148F-20 Datasheet (ICST)

Integrated
Circuit
Systems, Inc.

General Description Features

ICS9148-20

Block Diagram

Pentium/ProTM System Clock Chip

9148-20 Rev C 03/28/98

Pin Configuration

48-Pin SSOP

Pentium is a trademark on Intel Corporation.

 Generates system clocks for CPU, IOAPIC, PCI, plus

14.314 MHz REF (0:2), USB, and Super I/O
 Supports single or dual processor systems
 Supports Spread Spectrum modulation for CPU & PCI

clocks, down spread -0.5%

 Skew from CPU (earlier) to PCI clock (rising edges for

100/33.3MHz) 1.5 to 4ns
 Two fixed outputs at 48MHz.
 Separate 2.5V and 3.3V supply pins
 2.5V or 3.3V output: CPU, IOAPIC
 3.3V outputs: PCI, REF, 48MHz
 No power supply sequence requirements
 Uses external 14.318MHz crystal, no external load cap

required for CL=18pF crystal
 48 pin 300 mil SSOP

The ICS9148-20 is a Clock Synthesizer chip for Pentium and
PentiumPro CPU based Desktop/Notebook systems that will
provide all necessary clock timing.

Features include four CPU and eight PCI clocks. Three
reference outputs are available equal to the crystal frequency.
Additionally, the device meets the Pentium power-up
stabilization requirement, assuring that CPU and PCI clocks
are stable within 2ms after power-up.

PD# pin enables low power mode by stopping crystal OSC
and PLL stages. Other power management features include
CPU_STOP#, which stops CPU (0:3) clocks, and PCI_STOP#,
which stops PCICLK (0:6) clocks.

High drive CPUCLK outputs typically provide greater than 1
V/ns slew rate into 20pF loads. PCICLK outputs typically
provide better than 1V/ns slew rate into 30pF loads while
maintaining 50±5% duty cycle. The REF clock outputs
typically provide better than 0.5V/ns slew rates.

The ICS9148-20 accepts a 14.318MHz reference crystal or
clock as its input and runs on a 3.3V core supply.

Power Groups

VDD = Supply for PLL core
VDD1 = REF (0:2), X1, X2
VDD2 = PCICLK_F, PCICLK (0:6)
VDD3 = 48MHz0, 48MHz1
VDDL1 = IOAPIC (0:1)
VDDL2 = CPUCLK (0:3)

Ground Groups

GND = Ground for PLL core
GND1 = REF (0:2), X1, X2
GND2 = PCICLK_F, PCICLK (0:6)
GND3 = 48MHz0, 48MHz1
GNDL1 = IOAPIC (0:1)
GNDL2 = CPUCLK (0:3)

ICS reserves the right to make changes in the device data identified in this
publication without further notice. ICS advises its customers to obtain the latest
version of all device data to verify that any information being relied upon by the
customer is current and accurate.

2

ICS9148-20

Pin Descriptions

Select Functions

Notes:

1. TCLK is a test clock driven on the X1 (crystal in
pin) input during test mode.

2. -0.5% modulation down spread from the selected
frequency.

Functionality CPU

PCI,

PCI_F

REF IOAPIC

48 MHz

Selection

Tristate HI - Z HI - Z HI - Z HI - Z HI - Z

Testmode T CLK/2

1

TCLK/6

1

TCLK

1

TCLK

1

TCLK/2

1

Spread Spectrum Modulated2Modulated214.318MHz 14.318MHz 48.0MHz

SEL 100/66# FS1 FS0 Function

0 0 0 Tri-State
001 (Reserved)
010 (Reserved)
0 1 1 Active 66.6MHz CPU, 33.3 PCI
100 Test Mode
101 (Reserved)
110 (Reserved)
1 1 1 Active 100MHz CPU, 3 3.3 PCI

PIN NUMBER PIN NAME TYPE DESCRIPTION

1, 2, 47 REF (0:2) OUT 14.318MHz clock output

3 GND1 PWR Ground for REF outputs
4X1IN

XTAL_IN 14.318MH z Crystal input, has internal 33pF
load cap and feed back resistor from X 2

5 X2 OUT XTAL_OUT Crystal output, has internal load cap 33pF

6, 12, 18 GND2 PWR Ground for PCI outputs

7 PCICLK_F OUT Free Running PCI output

8, 10, 11, 13, 14, 16,

17

PCICLK (0:6) OUT PCI clock outputs. TTL compatible 3.3V

9, 15 VDD 2 PW R Power for PCICLK outputs, nominally 3.3V
19, 33 VDD PW R Isolated power for core, nominally 3.3V
20, 32 GN D PWR Isolated ground for core

21 VDD3 PWR Power for 48MHz outputs, nominally 3.3V

22, 23 48MH z (0:1) OUT 48MH z outputs

24 GND3 PWR Ground for 48MHz outputs

25 SEL100/66.6# IN

Select pin for enabling 100MHz or 66.6MH z
H=100M Hz, L=66.6M Hz (PCI always synchronous

33.3MH z)

26, 27 FS (0:1) IN Frequency Select pins

28 SPRE AD # IN Enables Spread Spectrum feature when LOW
29 PD # IN P ow ers dow n c hip , active low
30 CPU_STOP# IN Halts CPU clocks at logic "0" level when low

31 PC I_S TO P# IN Ha lts PCI B us at lo gic "0" leve l whe n low
37, 41 VDDL2 PWR Power for CPU outputs, nominally 2.5V
34, 38 G NDL2 PW R Ground for CPU outputs.

35, 36, 39, 40 CPUC LK (3:0) OU T CPU and Host clock outputs @ 2.5V

42 N /C - N ot in tern ally con nec ted

43 GNDL1 PWR Ground for IOAPIC outputs
44, 45 IOA PIC (0:1) O UT IOA PIC outpu ts (14.31 8M Hz ) @ 2.5V

46 VDDL1 PWR Power for IOAPIC outputs, nominally 2.5V

48 VDD1 PWR Supply for REF (0:1), X1, X2, nominal 3.3V

3

ICS9148-20

T echnical Pin Function Descriptions

VDD(1,2,3)

This is the power supply to the internal core logic of the
device as well as the clock output buffers for REF(0:2),
PCICLK_F, PCICLK (0:6), 48MHz0, 48MHz1.

This pin operates at 3.3V volts. Clocks from the listed buffers
that it supplies will have a voltage swing from Ground to this
level. For the actual guaranteed high and low voltage levels
for the Clocks, please consult the DC parameter table in this
data sheet.

VDDL1,2

This is the power supply for the CPUCLK (0:3) and IOAPIC
output buffers. The voltage level for these outputs may be

2.5 or 3.3volts. Clocks from the buffers that each supplies will
have a voltage swing from Ground to this level. For the actual
Guaranteed high and low voltage levels of these Clocks,
please consult the DC parameter table in this Data Sheet.

GND (1,2,3)

This is the ground to the internal core logic of the device as
well as the clock output buffers for REF(0:2), PCICLK_F,
PCICLK (0:6), 48MHz 0, 48MHz1.

GNDL (1,2)

This is the ground for the CPUCLK (0:3) and IOAPIC output
buffers.

X1

This input pin serves one of two functions. When the device
is used with a Crystal, X1 acts as the input pin for the
reference signal that comes from the discrete crystal. When
the device is driven by an external clock signal, X1 is the
device input pin for that reference clock. This pin also
implements an internal Crystal loading capacitor that is
connected to ground. With a nominal value of 33pF no
external load cap is needed for a CL=17 to 18pF crystal.

X2

This Output pin is used only when the device uses a Crystal
as the reference frequency source. In this mode of operation,
X2 is an output signal that drives (or excites) the discrete
Crystal. The X2 pin will also implement an internal Crystal
loading capacitor nominally 33pF.

CPUCLK (0:3)

These Output pins are the Clock Outputs that drive processor
and other CPU related circuitry that requires clocks which are
in tight skew tolerance with the CPU clock. The voltage
swing of these Clocks is controlled by the Voltage level
applied to the VDDL2 pin of the device. See the Functionality
Table for a list of the specific frequencies that are available
for these Clocks and the selection codes to produce them.

48MHz (0:1)

This is a fixed frequency Clock output that is typically used
to drive Super I/O devices. Outputs 0 and 1 are defined as
48MHz.

IOAPIC (0:1)

This Output is a fixed frequency Output Clock that runs at
the Reference Input (typically 14.31818MHz) . Its voltage
level swing is controlled by VDDL1 and may operate at 2.5 or

3.3volts.

REF(0:2)

The REF Outputs are fixed frequency Clocks that run at the
same frequency as the Input Reference Clock X1 or the
Crystal (typically 14.31818MHz) attached across X1 and X2.

PCICLK_F

This Output is equal to PCICLK(0:6) and is FREE RUNNING,
and will not be stopped by PCI_STOP#.

PCICLK (0:6)

These Output Clocks generate all the PCI timing requirements
for a Pentium/Pro based system. They conform to the current
PCI specification. They run at 33.3 MHz.

SELECT 100/66.6MHz#

This Input pin controls the frequency of the Clocks at the
CPUCLK, PCICLK and SDRAM output pins. If a logic 1
value is present on this pin, the 100MHz Clock will be selected.
If a logic 0 is used, the 66.6MHz frequency will be selected.
The PCI clock is multiplexed to be 33.3MHz for both select
cases. PCI is synchronous at the rising edge of PCI to the
CPU rising edge (with the skew making CPU early).

PWR_DWN#

This is an asynchronous active Low Input pin used to Power
Down the device into a Low Power state by not removing the
power supply. The internal Clocks are disabled and the VCO
and Crystal are stopped. Powered Down will also place all
the Outputs in a low state at the end of their current cycle.
The latency of Power Down will not be greater than 3ms.

CPU_STOP#

This is a synchronous active Low Input pin used to stop the
CPUCLK clocks in an active low state. All other Clocks
including SDRAM clocks will continue to run while this
function is enabled. The CPUCLKs will have a turn ON
latency of at least 3 CPU clocks.

PCI_STOP#

This is a synchronous active Low Input pin used to stop the
PCICLK clocks in an active low state. It will not affect
PCICLK_F nor any other outputs.

4

ICS9148-20

Power Management

ICS9148-20 Power Management Requirements

Clock Enable Configuration

Full clock cycle timing is guaranteed at all times after the system has initially powered up except where noted. During power
up and power down operations using the PD# select pin will not cause clocks of a shorter or longer pulse than that of the
running clock. The first clock pulse coming out of a stopped clock condition may be slightly distorted due to clock network
charging circuitry. Board routing and signal loading may have a large impact on the initial clock distortion also.

Notes.

1. Clock on latency is defined from when the clock enable goes active to when the first valid clock comes out of the device.

2. Clock off latency is defined from when the clock enable goes inactive to when the last clock is driven low out of the device.

3. Power up latency is when PD# goes inactive (high) to when the first valid clocks are output by the device.

4. Power down has controlled clock counts applicable to CPUCLK, PCICLK only.
The REF and IOAPIC will be stopped independent of these.

SIGNAL SIGNAL STATE

Latency

No. of rising edges of free

running PCICLK

CPU_ STOP# 0 (Disabled)

2

1

1 (Enabled)

1

1

PCI_STOP# 0 (Disabled)

2

1

1 (Enabled)

1

1

PD# 1 (N ormal Op eration )

3

3ms

0 (Power Down)

4

2max

CPU_STOP# PCI_STOP# PWR_DWN# CPUCLK PCICL K

Other Clocks,

REF,

IOAPICs,
48 MHz 0
48 MHz 1

Crystal VCOs

X X 0 Low Low Stopped Off Off

0 0 1 L ow Low Run ning Running Running
0 1 1 L ow 33.3 MHz Run ning Running Running
1 0 1 100/66. 6MHz Low Running Running Running
1 1 1 100/66. 6MHz 33.3 MHz Running Running R unning

5

ICS9148-20

PCI_STOP# Timing Diagram

PCI_STOP# is an asynchronous input to the ICS9148-20. It is used to turn off the PCICLK (0:6) clocks for low power operation.
PCI_STOP# is synchronized by the ICS9148-20 internally. The minimum that the PCICLK (0:6) clocks are enabled (PCI_STOP#
high pulse) is at least 10 PCICLK (0:6) clocks. PCICLK (0:6) clocks are stopped in a low state and started with a full high pulse
width guaranteed. PCICLK (0:6) clock on latency cycles are only one rising PCICLK. Clock off latency is one PCICLK clock.

CPU_STOP# Timing Diagram

CPUSTOP# is an asychronous input to the clock synthesizer. It is used to turn off the CPUCLKs for low power operation.
CPU_STOP# is synchronized by the ICS9148-20. The minimum that the CPUCLK is enabled (CPU_STOP# high pulse) is 100
CPUCLKs. All other clocks will continue to run while the CPUCLKs are disabled. The CPUCLKs will always be stopped in a low
state and start in such a manner that guarantees the high pulse width is a full pulse. CPUCLK on latency is less than 4 CPUCLKs
and CPUCLK off latency is less than 4 CPUCLKs.

Notes:

1. All timing is referenced to the internal CPUCLK.

2. CPU_STOP# is an asynchronous input and metastable conditions may exist.
This signal is synchronized to the CPUCLKs inside the ICS9148-20.

3. All other clocks continue to run undisturbed.

4. PD# and PCI_STOP# are shown in a high (true) state.

Notes:

1. All timing is referenced to the Internal CPUCLK (defined as inside the ICS9148 device.)

2. PCI_STOP# is an asynchronous input, and metastable conditions may exist. This signal is required to be synchronized
inside the ICS9148-20.

3. All other clocks continue to run undisturbed.

4. PD# and CPU_STOP# are shown in a high (true) state.

6

ICS9148-20

PD# Timing Diagram

The power down selection is used to put the part into a very low power state without turning off the power to the part. PD# is
an asynchronous active low input. This signal is synchronized internally by the ICS9148-20 prior to its control action of
powering down the clock synthesizer. Internal clocks will not be running after the device is put in power down state. When PD#
is active (low) all clocks are driven to a low state and held prior to turning off the VCOs and the Crystal oscillator. The power
on latency is guaranteed to be less than 3ms. The power down latency is less than three CPUCLK cycles. PCI_STOP# and
CPU_STOP# are dont care signals during the power down operations.

Notes:

1. All timing is referenced to the Internal CPUCLK (defined as inside the ICS9148 device).

2. PD# is an asynchronous input and metastable conditions may exist. This signal is synchronized inside the ICS9148.

3. The shaded sections on the VCO and the Crystal signals indicate an active clock is being generated.

7

ICS9148-20

Electrical Characterist ics - Input /Suppl y/Comm on Output Parameters

TA = 0 - 70C; Supply Voltage VDD = V

DDL

= 3.3 V +/-5% (unless otherwise stated)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input High Vol tage V

IH

2V

DD

+0.3 V

In put Low Voltage V

IL

VSS-0.3 0 .8 V

Input High Curr e nt I

IH

VIN = V

DD

0.1 5

µ

A

Input Low Current I

IL1

VIN = 0 V; Inputs with no pul l-up re si stor s -5 2. 0

µ

A

Input Low Current I

IL2

VIN = 0 V; Inputs with pull-up resistors -20 0 -100

µ

A

Operating I

DD3.3OP66CL

= 0 pF; Select @ 66MHz 60 170 mA

Supply Current I

DD3.3OP100CL

= 0 pF; Select @ 100MHz 66 170

Power Down I

DD3.3PDCL

= 0 pF; With i nput a dd ress to Vdd or GND 3 600

µ

A

Supply Current

Input frequen cy F

i

VDD = 3.3 V; 14.318 MHz

Input Capacitance

1

C

IN

Logic Inputs 5 pF

C

INX

X1 & X2 pins 27 36 45 pF

Transiti on Time

1

T

trans

To 1st crossing of target F req. 3 ms

Settling Tim e

1

T

s

From 1st crossing to 1 % ta rget Freq. 5 ms

Clk Stabilization

1

T

STAB

From VDD = 3.3 V to 1% target Freq. 3 ms

Skew

1

T

CPU-P CI1VT

= 1.5 V;

1.5 3 4 ns

1

Guar a nt e ed by design, not 100% tested in product ion.

Absolute Maximum Ratings

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 V

Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND 0.5 V to VDD +0.5 V

Ambient Operating Temperature. . . . . . . . . . . . 0°C to +70°C

Storage Temperature . . . . . . . . . . . . . . . . . . . . . 65°C to +150°C

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are
stress specifications only and functional operation of the device at these or any other conditions above those listed in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect product reliability.

Electrical Characteristics - Input/Supply/Common Output Parameters

TA = 0 - 70C; Supply Voltage VDD = 3.3 V +/-5%, V

DDL

= 2.5 V +/-5% (unless otherwise state d)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating I

DD2.5OP66

CL = 0 pF; Select @ 66.8 MHz 16 72 mA

Supply Current I

DD2.5OP100CL

= 0 pF; Select @ 100 MHz 23 100 mA

Skew

1

t

CPU-PCI2

VT = 1.5 V; VTL = 1.25 V

1.5 3 4 ns

1

Guar a nt e ed by design, not 100% tested in product ion.

8

ICS9148-20

Ele ctrical Characteristics - CP UCLK

TA = 0 - 70C; VDD = 3.3 V +/-5%, V

DDL

= 2.5 V +/-5%; CL = 10 - 20 pF ( unless otherwise stated)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

O utp ut Impedanc e R

DSP2B

1

VO = VDD*(0.5) 13.5 45

Ω

O utp ut Impedanc e R

DSN2B

1

VO = VDD*(0.5) 13.5 45

Ω

O utput High Voltage V

OH2BIOH

= -12.0 mA 2 2.3 V

Output Low Voltage V

OL2BIOL

= 12 mA 0.2 0.4 V

Ou tput High Current I

OH2B

VOH = 1.7 V -41 -19 mA

Output Low Current I

OL2B

VOL = 0.7 V 19 37 mA

Rise Time t

r2B

1

VOL = 0.4 V, VOH = 2.0 V 1.25 1.6 ns

Fall Time t

f2B

1

VOH = 2.0 V , VOL = 0.4 V 1 1.6 ns

Duty Cycle d

t2B

1

VT = 1.25 V 45 48 55 %

Skew t

sk2B

1

VT = 1.25 V 30 175 ps

Jitter, Cycle-to-cyc le t

jcyc-cyc2B

1

VT = 1.25 V 150 200 ps

Jitter, One Si gma t

j1s2B

1

VT = 1.25 V 40 150 ps

Jitter, Absolute

t

jabs2B

1

VT = 1.25 V

-250 140 +250 ps

1

Guar a nt eed by design, not 100% tested in production.

Ele ctrical Ch aracteristics - IO APIC

TA = 0 - 70C; VDD = 3.3 V +/-5%, V

DDL

= 2.5 V +/-5%; CL = 20 pF

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Output Impedance

1

R

DSP4B

VO = VDD*(0.5) 13.5 45 Ohm

Output Impedance

1

R

DSN4B

VO = VDD*(0.5) 13.5 45 Ohm

Output High Voltage V

OH4BIOH

= -18 mA 2 2.2 V

Output Low Voltage V

OL4B

IOL = 18 mA 0.33 0.4 V

Ou tput High Current I

OH4B

VOH = 1.7 V -41 -28 mA

O ut put Low Current I

OL4B

VOL = 0.7 V 29 37 mA

Rise Time

1

T

r4B

VOL = 0.4 V , VOH = 2.0 V 1.3 1.6 ns

Fall Time

1

T

f4B

VOH = 2.0 V, VOL = 0.4 V 1.1 1.6 ns

Duty Cycle

1

D

t4B

VT = 1.25 V 45 54 55 %

Skew

1

t

sk4B

1

VT = 1.25 V 60 250 ps

Jitter, One Si gma

1

T

j1s4B

VT = 1.25 V 1 3 %

Jitter, Absolute

1

T

jabs4B

VT = 1.25 V

-5 5 %

1

Guar a n te ed by design, not 100% tested in produc t ion.

9

ICS9148-20

Electrical Characteristics - PCICLK

TA = 0 - 70C; VDD = V

DDL

= 3.3 V +/-5%; CL = 30 pF

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

O utput Im pe da nc e

1

R

DSP1

VO = VDD*(0.5) 12 55 Ohm

O utput Im pe da nc e

1

R

DSN1

VO = VDD*(0.5) 12 55 Ohm

O utput High Voltage V

OH1

IOH = -11 mA 2.4 3.1 V

Output Low Voltage V

OL1

IOL = 9.4 mA 0.1 0.4 V

Ou tput High Current I

OH1

VOH = 2.0 V -62 -22 mA

Output Low Current I

OL1

VOL = 0.8 V 16 57 mA

Rise Time

1

t

r1

VOL = 0.4 V, VOH = 2.4 V 1.5 2 ns

Fall Time

1

t

f1

VOH = 2.4 V , VOL = 0.4 V 1.1 2 ns

Duty Cycle

1

d

t1

VT = 1.5 V 45 50 55 %

Skew

1

t

sk1

VT = 1.5 V 140 500 ps

Jitter, O ne S igm a

1

t

j1s1

VT = 1.5 V 17 150 ps

Jitter, Absolute

1

t

jabs1

VT = 1.5 V

-500 70 500 ps

1

Guar a nt eed by design, not 100% tested in production.

Ele ctrica l Characteri stics - REF

TA = 0 - 70C; VDD = V

DDL

= 3.3 V +/-5%; CL = 10 - 20 pF (unless otherwise stated)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

O utput Im pe da nc e

1

R

DSP5

VO = VDD*(0.5) 13.5 45 Ohm

O utput Im pe da nc e

1

R

DSN5

VO = VDD*(0.5) 13.5 45 Ohm

O utput High Voltage V

OH5

IOH = -12 mA 2.6 3.1 V

Output Low Voltage V

OL5

IOL = 9 mA 0.17 0.4 V

Ou tput High Current I

OH5

VOH = 2.0 V -44 -22 mA

Output Low Current I

OL5

VOL = 0.8 V 29 42 mA

Rise Time

1

t

r5

VOL = 0.4 V, VOH = 2.4 V 1.4 2 ns

Fall Time

1

t

f5

VOH = 2.4 V , VOL = 0.4 V 1.1 2 ns

Duty Cycle

1

d

t5

VT = 1.5 V 45 53 55 %

Jitter, O ne S igm a

1

t

j1s5

VT = 1.5 V 1 3 %

Jitter, Absolute

1

t

jabs5

VT = 1.5 V

35%

1

Guar a nt e ed by design, not 100% tested in product ion.

10

ICS9148-20

Ele ctrica l Characteri stics - 48 MHz

TA = 0 - 70C; VDD = V

DDL

= 3.3 V +/-5%; CL = 10 - 20 pF (unless otherwise stated)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Fr equency Accuracy

1

F

ACC48m

167 ppm

O utput Im pe da nc e

1

R

DSP5

VO = VDD*(0.5) 20 60 Ohm

O utput Im pe da nc e

1

R

DSN5

VO = VDD*(0.5) 20 60 Ohm

O utput High Voltage V

OH5

IOH = -12 mA 2.6 3 V

Output Low Voltage V

OL5

IOL = 9 mA 0.14 0.4 V

Ou tput High Current I

OH5

VOH = 2.0 V -44 -22 mA

Output Low Current I

OL5

VOL = 0.8 V 16 42 mA

Rise Time

1

t

r5

VOL = 0.4 V, VOH = 2.4 V 1.2 4 ns

Fall Time

1

t

f5

VOH = 2.4 V , VOL = 0.4 V 1.2 4 ns

Duty Cycle

1

d

t5

VT = 1.5 V 45 52 55 %

Jitter, O ne S igm a

1

t

j1s5

VT = 1.5 V 1 3 %

Jitter, Absolute

1

t

jabs5

VT = 1.5 V

35%

1

Guar a nt eed by design, not 100% tested in production.

11

ICS9148-20

Ordering Information

ICS9148F-20

Pattern Number (2 or 3 digit number for parts with ROM code patterns)

Package Type

F=SSOP

Device Type (consists of 3 or 4 digit numbers)

Prefix

ICS, AV = Standard Device

Example:

ICS XXXX F - PPP

This table in inches

SSOP Package

SYMBOL COMMON DIMENSIONS VARIATIONS D N

MIN. NOM. MAX. MIN. NOM. MAX.

A .095 .101 .110 AC .620 .625 .630 48
A1 .008 .012 .016 AD .720 .725 .730 56
A2 .088 .090 .092

B .008 .010 .0135

C .005 .006 .0085

D See Variations

E .292 . 296 .29 9

e0.025 BSC

H .400 .406 .410

h .010 .013 .016

L .024 .032 .040

N See Variations

∝

0° 5° 8°

X .085 .093 .100

ICS reserves the right to make changes in the device data identified in this
publication without further notice. ICS advises its customers to obtain the latest
version of all device data to verify that any information being relied upon by the
customer is current and accurate.