    





    Figure 11~ CCITT V.23 Handehake Timing
    
    1
    
       h.~ I    &       ~ I I +~t I    ~ :1 -'   ~'
    
    l L 1 1 . "~
    
    ú~
    
             '-~U 1 1   1
    
    1W
    
    !' _
    
    1/1--1- ~- I ~ ~ ~ /illf / / / Al/ / / / /
    ~ 1
    
     1 1     11  1  1 '      ~t        ~.
    
           ~ _=,TtÄ"-,I _,,~,,c,~,_ IJ __-
    A..~
    
    ~/ / / / / / / / / Y ~ / / i1t ~ / Ž~-1 ~-tú~__; 1 / / ~ / 7
    
           ~ r~ ~
    
    0 2 - c 3
    
    MAXIMUM RATINGS
    
    Ambiont Ten~peranlre under Bias
    Vc~ Wi~t Respact tO VDBhD
    
                                                      0 10 +70 C
                 ~                                              ~+6VJÄ.4V
    
                 V88 w~th Respact lo VDGND                           -6V/~.4V
                  . .                                 .  _
    
    411 Signal VotIages with Respect to VDGND ~ 5V
                                                  . .
    
    The prodacts described b~v ~is specificabon include internal cirevitry designsd to protecl input aevices from damaging accumulaborts or
    charge 11 is suggested. never~teless, that conventional pn?c~.utons be obserwed during storage. handling and uss in order to avo~d
    exposure lo excassiva voltages.
    SVasses above those listed under ' Absdute Ma~imum Rabngs" may causa permanenl damege lo ~e devicn This is a slrass rating
    only and functional operabon ot ~te device al ~esa or any other cond~bons above ~osa indcaled in tha operabonal secions ot ~is
    specif~'lion is not implied Exposure to absolute maximum rating cond~hons tor extended periods rnay aftect devic. reliability.
    
                               OPERATING RANGE
                               AmblenlT mperatut~t vcc V~n VAGND          VDOND
                               O.C.TA. +70'C ~ +SOV-5~4 1 -50V+57. 1 OV '50rV  1    OV
    
    DC CHARACIERISnCS
    Digital Inpub: TD, RTS, MCo-MC4, DTR, RING, HTD, BRTS
    Digital Outputs: RD, CTS. CD, BRD, BCTS, BCD
    
         Pantmetere     Dcacriptlon
    
        VOH
        VO'
        VIH  -
        V'r
        VIHC
        VILC
        VIHR
        VILR
        llL
        kc
        es
        CaJT
    
      CIN
    
                     Outpul HIGH Voltage
    

    





    .-
    
                      Oulpul LOW Vohage
    
    Input HIGH Vottage
    Input LOW Volla9e
    
    .
    
              External Cbdl Ir~pul HIGH (XTAL1)
              Extemell Clock trpul LOW (XTALt)
    
    ._
    Extenul Resel Inpul HIBH (RESET)
    
    Exiemsl Rese'lnpul LOW (RESET)
    
    Digital Inpul LoaMage Cunent
    
    vcc Suw~ Curenl
    
    ._
    
    VOB Supply Cunenl
    
    Outpul Capaatar~
    Inpul Caparj~
    
                       Test Gonditions
    
                   IOFt - - 50 - A, CLDÄ50pF
                    IOL - t 2n~ CLD = 50pf
    
                             Uln
                             24
    
    Typ
    
                              .
                            1 1'
    
                      -~_   r:
    
                           1 o.s 1
                           1 -0.5 ~
                           1 3.e 1
    
    1 -1o 1
       '1
    
               O ~ YIN ~ VCC I
    
    Ic~ 1.0M~z
    
    .
    
    ~c ~ 1 0MHz
    
                             04
                           i vco 1
                            1 ~ 1
                          1 ~ol' 1
                          1 vet- 1.
                          16 06t 1
                           1- vcc 1
                           1 .08 1
                             1 1
                           I ~lo L
                          1 125..1.
                            r25 1
                            ~ ---- - 1
                           1 15 1
                           1 15 1
    
      ~bx  Unit
             i
           vOn'    ,
        |  Vdls    j
        |  Vr~s    j
        1
           VraRs   j
    
    vOns---l
    

    





    Volls
    Volls I
    vOnS :
    
    ~ !
    
    n'A |
    
                             n~
                             pF
                             pF
    
       RIN            Tlnput Re61st ~|  -1 6V c VRC ~ + 1 6V    I    -    1    -    |    |    Kohms     j
       VRc            | qwrabnr~t Input Sgnal
                      I ~
       Vorr~c         | Aklw0<t DC tnput Ollsel    |   REF VAG
    
     1  -16  1   1~,.6 1     Vofts     it
        -30  1   1~ 30 1     mV   ~
    
                        1
        VTCOS         | Outpul DC Ons~t     ~
    
    