CXD2457R View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

Manufacturer

CXD2457R

Timing Generator for Progressive Scan CCD Image Sensor

Sony Semiconductor 

CXD2457R

Inverter I/O Characteristics for Oscillation

(Within the recommended operating conditions)

Item

Pins

Symbol

Conditions

Min.

Typ.

Max. Unit

Logical Vth

OSCI

LVth

VDDa/2

V

VIH

Input voltage

OSCI

VIL

0.7VDDd

V

0.3VDDa V

Output voltage OSCO

VOH Feed current where IOH = –6.0mA VDDa/2

VOL Pull-in current where IOL = 6.0mA

V

VDDa/2 V

Feedback resistor OSCI, OSCO RFB VIN = VDDd or Vss

500k

2M

5M

Ω

Oscillator frequency OSCI, OSCO f

20

50 MHz

Base Oscillation Clock Input Characteristics

(Within the recommended operating conditions)

Item

Pins

Symbol

Conditions

Min.

Typ.

Max. Unit

Logical Vth

LVth

VDDa/2

V

VIH

Input voltage

CKI

VIL

0.7VDDa

V

0.3VDDa V

Input amplification

VIN fmax 50MHz sine wave

0.3

Vp-p

∗1 Input voltage is the input voltage characteristics for direct input from an external source. Input amplification

is the input amplification characteristics for input through capacitor.

Switching Characteristics

(VH = 15.0V, VM = GND, VL = –8.5V)

Item

Symbol

Conditions

Min.

Typ.

Max. Unit

TTLM VL to VM

350

550 ns

Rise time

TTMH VM to VH

450

700 ns

TTLH VL to VH

50

80

ns

TTML VM to VL

250

400 ns

Fall time

TTHM VH to VM

300

450 ns

TTHL VH to VL

50

80

ns

VCLH

1.0

V

Output noise

voltage

VCLL

VCMH

1.0

V

1.0

V

VCML

1.0

V

∗1 The MOS structure of this IC has a low tolerance for static electricity, so full care should be given for

measures to prevent electrostatic discharge.

∗2 For noise and latch-up countermeasures, be sure to connect a bypass capacitor (0.1µF or more) between

each power supply pin (VH, VL) and GND.

–7–

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